Modules
	Connections with C++

Classes
struct	CvAttrList
	List of attributes. : More...

struct	CvBox2D

struct	CvChain

struct	CvContour

struct	CvFileNode

struct	CvGraph

struct	CvGraphEdge

struct	CvGraphScanner

struct	CvGraphVtx

struct	CvGraphVtx2D

struct	CvHistogram

struct	CvLineIterator

struct	CvMat

struct	CvMatND

struct	CvMemBlock

struct	CvMemStorage

struct	CvMemStoragePos

struct	CvModuleInfo

struct	CvNArrayIterator

struct	CvPluginFuncInfo

struct	CvPoint

struct	CvPoint2D32f

struct	CvPoint2D64f

struct	CvPoint3D32f

struct	CvPoint3D64f

struct	CvRect

struct	CvScalar

struct	CvSeq

struct	CvSeqBlock

struct	CvSeqReader

struct	CvSeqWriter

struct	CvSet

struct	CvSetElem

struct	CvSize

struct	CvSize2D32f

struct	CvSlice

struct	CvSparseMat

struct	CvSparseMatIterator

struct	CvSparseNode

struct	CvString

struct	CvStringHashNode

struct	CvTermCriteria

struct	CvTreeNodeIterator

struct	CvTypeInfo
	Type information. More...

struct	IplConvKernel

struct	IplConvKernelFP

struct	IplImage

struct	IplROI

Macros
#define	__CV_BEGIN__ {

#define	__CV_END__ goto exit; exit: ; }

#define	__CV_EXIT__ goto exit

#define	CV_ARE_CNS_EQ(mat1, mat2) ((((mat1)->type ^ (mat2)->type) & CV_MAT_CN_MASK) == 0)

#define	CV_ARE_DEPTHS_EQ(mat1, mat2) ((((mat1)->type ^ (mat2)->type) & CV_MAT_DEPTH_MASK) == 0)

#define	CV_ARE_SIZES_EQ(mat1, mat2) ((mat1)->rows == (mat2)->rows && (mat1)->cols == (mat2)->cols)

#define	CV_ARE_TYPES_EQ(mat1, mat2) ((((mat1)->type ^ (mat2)->type) & CV_MAT_TYPE_MASK) == 0)

#define	CV_ASSERT(Condition)

#define	CV_AUTO_STEP 0x7fffffff

#define	CV_AUTOSTEP 0x7fffffff

#define	CV_BACK 0

#define	CV_CALL(Func)

#define	CV_CHECK()

#define	CV_CHECK_QUIET 2

#define	CV_CHECK_RANGE 1

#define	CV_CHOLESKY 3

#define	CV_CMP(a, b) (((a) > (b)) - ((a) < (b)))

#define	CV_CMP_EQ 0

#define	CV_CMP_GE 2

#define	CV_CMP_GT 1

#define	CV_CMP_LE 4

#define	CV_CMP_LT 3

#define	CV_CMP_NE 5

#define	CV_CONTOUR_FIELDS()

#define	CV_CURRENT_POINT(reader) (((CvPoint)((reader).ptr)))

#define	CV_ErrModeLeaf 0 /* Print error and exit program */

#define	CV_ErrModeParent 1 /* Print error and continue */

#define	CV_ErrModeSilent 2 /* Don't print and continue */

#define	CV_ERROR(Code, Msg)

#define	CV_FRONT 1

#define	CV_FUNCNAME(Name) static char cvFuncName[] = Name

#define	CV_GEMM_A_T 1

#define	CV_GEMM_B_T 2

#define	CV_GEMM_C_T 4

#define	CV_GET_SEQ_ELEM(elem_type, seq, index) CV_SEQ_ELEM( (seq), elem_type, (index) )

#define	CV_GRAPH CV_SEQ_KIND_GRAPH

#define	CV_GRAPH_ALL_ITEMS -1

#define	CV_GRAPH_ANY_EDGE 30

#define	CV_GRAPH_BACK_EDGE 4

#define	CV_GRAPH_BACKTRACKING 64

#define	CV_GRAPH_CROSS_EDGE 16

#define	CV_GRAPH_FLAG_ORIENTED (1 << CV_SEQ_FLAG_SHIFT)

#define	CV_GRAPH_FORWARD_EDGE 8

#define	CV_GRAPH_FORWARD_EDGE_FLAG (1 << 28)

#define	CV_GRAPH_ITEM_VISITED_FLAG (1 << 30)

#define	CV_GRAPH_NEW_TREE 32

#define	CV_GRAPH_OVER -1

#define	CV_GRAPH_SEARCH_TREE_NODE_FLAG (1 << 29)

#define	CV_GRAPH_TREE_EDGE 2

#define	CV_GRAPH_VERTEX 1

#define	CV_HIST_ARRAY 0

#define	CV_HIST_HAS_RANGES(hist) (((hist)->type & CV_HIST_RANGES_FLAG) != 0)

#define	CV_HIST_MAGIC_VAL 0x42450000

#define	CV_HIST_RANGES_FLAG (1 << 11)

#define	CV_HIST_SPARSE 1

#define	CV_HIST_TREE CV_HIST_SPARSE

#define	CV_HIST_UNIFORM 1

#define	CV_HIST_UNIFORM_FLAG (1 << 10)

#define	CV_IABS(a) abs(a)

#define	CV_IMAGE_ELEM(image, elemtype, row, col) (((elemtype)((image)->imageData + (image)->widthStep(row)))[(col)])

#define	CV_IMAX(a, b) ((a) ^ (((a)^(b)) & (((a) > (b)) - 1)))

#define	CV_IMIN(a, b) ((a) ^ (((a)^(b)) & (((a) < (b)) - 1)))

#define	CV_IS_GRAPH(seq) (CV_IS_SET(seq) && CV_SEQ_KIND((CvSet*)(seq)) == CV_SEQ_KIND_GRAPH)

#define	CV_IS_GRAPH_EDGE_VISITED(edge) (((CvGraphEdge*)(edge))->flags & CV_GRAPH_ITEM_VISITED_FLAG)

#define	CV_IS_GRAPH_ORIENTED(seq) (((seq)->flags & CV_GRAPH_FLAG_ORIENTED) != 0)

#define	CV_IS_GRAPH_VERTEX_VISITED(vtx) (((CvGraphVtx*)(vtx))->flags & CV_GRAPH_ITEM_VISITED_FLAG)

#define	CV_IS_HIST(hist)

#define	CV_IS_IMAGE(img) (CV_IS_IMAGE_HDR(img) && ((IplImage*)img)->imageData != NULL)

#define	CV_IS_IMAGE_HDR(img) ((img) != NULL && ((const IplImage*)(img))->nSize == sizeof(IplImage))

#define	CV_IS_MASK_ARR(mat) (((mat)->type & (CV_MAT_TYPE_MASK & ~CV_8SC1)) == 0)

#define	CV_IS_MAT(mat) (CV_IS_MAT_HDR(mat) && ((const CvMat*)(mat))->data.ptr != NULL)

#define	CV_IS_MAT_CONST(mat) (((mat)->rows\|(mat)->cols) == 1)

#define	CV_IS_MAT_HDR(mat)

#define	CV_IS_MAT_HDR_Z(mat)

#define	CV_IS_MATND(mat) (CV_IS_MATND_HDR(mat) && ((const CvMatND*)(mat))->data.ptr != NULL)

#define	CV_IS_MATND_HDR(mat) ((mat) != NULL && (((const CvMatND*)(mat))->type & CV_MAGIC_MASK) == CV_MATND_MAGIC_VAL)

#define	CV_IS_SEQ(seq) ((seq) != NULL && (((CvSeq*)(seq))->flags & CV_MAGIC_MASK) == CV_SEQ_MAGIC_VAL)

#define	CV_IS_SEQ_CHAIN(seq) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE && (seq)->elem_size == 1)

#define	CV_IS_SEQ_CHAIN_CONTOUR(seq) (CV_IS_SEQ_CHAIN( seq ) && CV_IS_SEQ_CLOSED( seq ))

#define	CV_IS_SEQ_CLOSED(seq) (((seq)->flags & CV_SEQ_FLAG_CLOSED) != 0)

#define	CV_IS_SEQ_CONTOUR(seq) (CV_IS_SEQ_CLOSED(seq) && (CV_IS_SEQ_POLYLINE(seq) \|\| CV_IS_SEQ_CHAIN(seq)))

#define	CV_IS_SEQ_CONVEX(seq) 0

#define	CV_IS_SEQ_CURVE(seq) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE)

#define	CV_IS_SEQ_HOLE(seq) (((seq)->flags & CV_SEQ_FLAG_HOLE) != 0)

#define	CV_IS_SEQ_INDEX(seq)

#define	CV_IS_SEQ_POINT_SET(seq) ((CV_SEQ_ELTYPE(seq) == CV_32SC2 \|\| CV_SEQ_ELTYPE(seq) == CV_32FC2))

#define	CV_IS_SEQ_POINT_SUBSET(seq) (CV_IS_SEQ_INDEX( seq ) \|\| CV_SEQ_ELTYPE(seq) == CV_SEQ_ELTYPE_PPOINT)

#define	CV_IS_SEQ_POLYGON(seq) (CV_IS_SEQ_POLYLINE(seq) && CV_IS_SEQ_CLOSED(seq))

#define	CV_IS_SEQ_POLYGON_TREE(seq)

#define	CV_IS_SEQ_POLYLINE(seq) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE && CV_IS_SEQ_POINT_SET(seq))

#define	CV_IS_SEQ_SIMPLE(seq) 1

#define	CV_IS_SET(set) ((set) != NULL && (((CvSeq*)(set))->flags & CV_MAGIC_MASK) == CV_SET_MAGIC_VAL)

#define	CV_IS_SET_ELEM(ptr) (((CvSetElem*)(ptr))->flags >= 0)

#define	CV_IS_SPARSE_HIST(hist) CV_IS_SPARSE_MAT((hist)->bins)

#define	CV_IS_SPARSE_MAT(mat) CV_IS_SPARSE_MAT_HDR(mat)

#define	CV_IS_SPARSE_MAT_HDR(mat)

#define	CV_IS_STORAGE(storage)

#define	CV_IS_SUBDIV2D(seq) (CV_IS_SET(seq) && CV_SEQ_KIND((CvSet*)(seq)) == CV_SEQ_KIND_SUBDIV2D)

#define	CV_IS_UNIFORM_HIST(hist) (((hist)->type & CV_HIST_UNIFORM_FLAG) != 0)

#define	CV_KMEANS_USE_INITIAL_LABELS 1

#define	CV_LU 0

#define	CV_MAGIC_MASK 0xFFFF0000

#define	CV_MAT_ELEM(mat, elemtype, row, col) ((elemtype)CV_MAT_ELEM_PTR_FAST( mat, row, col, sizeof(elemtype)))

#define	CV_MAT_ELEM_PTR(mat, row, col) CV_MAT_ELEM_PTR_FAST( mat, row, col, CV_ELEM_SIZE((mat).type) )

#define	CV_MAT_ELEM_PTR_FAST(mat, row, col, pix_size)

#define	CV_MAT_MAGIC_VAL 0x42420000

#define	CV_MATND_MAGIC_VAL 0x42430000

#define	CV_MAX_ARR 10

#define	CV_MAX_DIM 32

#define	CV_MAX_DIM_HEAP 1024

#define	CV_NEXT_GRAPH_EDGE(edge, vertex)

#define	CV_NEXT_SEQ_ELEM(elem_size, reader)

#define	CV_NO_CN_CHECK 2

#define	CV_NO_DEPTH_CHECK 1

#define	CV_NO_SIZE_CHECK 4

#define	CV_NODE_EMPTY 32

#define	CV_NODE_FLOAT CV_NODE_REAL

#define	CV_NODE_FLOW 8

#define	CV_NODE_HAS_NAME(flags) (((flags) & CV_NODE_NAMED) != 0)

#define	CV_NODE_IDX(mat, node) ((int)((uchar)(node) + (mat)->idxoffset))

#define	CV_NODE_INT 1

#define	CV_NODE_INTEGER CV_NODE_INT

#define	CV_NODE_IS_COLLECTION(flags) (CV_NODE_TYPE(flags) >= CV_NODE_SEQ)

#define	CV_NODE_IS_EMPTY(flags) (((flags) & CV_NODE_EMPTY) != 0)

#define	CV_NODE_IS_FLOW(flags) (((flags) & CV_NODE_FLOW) != 0)

#define	CV_NODE_IS_INT(flags) (CV_NODE_TYPE(flags) == CV_NODE_INT)

#define	CV_NODE_IS_MAP(flags) (CV_NODE_TYPE(flags) == CV_NODE_MAP)

#define	CV_NODE_IS_REAL(flags) (CV_NODE_TYPE(flags) == CV_NODE_REAL)

#define	CV_NODE_IS_SEQ(flags) (CV_NODE_TYPE(flags) == CV_NODE_SEQ)

#define	CV_NODE_IS_STRING(flags) (CV_NODE_TYPE(flags) == CV_NODE_STRING)

#define	CV_NODE_IS_USER(flags) (((flags) & CV_NODE_USER) != 0)

#define	CV_NODE_MAP 6

#define	CV_NODE_NAMED 64

#define	CV_NODE_NONE 0

#define	CV_NODE_REAL 2

#define	CV_NODE_REF 4

#define	CV_NODE_SEQ 5

#define	CV_NODE_SEQ_IS_SIMPLE(seq) (((seq)->flags & CV_NODE_SEQ_SIMPLE) != 0)

#define	CV_NODE_SEQ_SIMPLE 256

#define	CV_NODE_STR 3

#define	CV_NODE_STRING CV_NODE_STR

#define	CV_NODE_TYPE(flags) ((flags) & CV_NODE_TYPE_MASK)

#define	CV_NODE_TYPE_MASK 7

#define	CV_NODE_USER 16

#define	CV_NODE_VAL(mat, node) ((void)((uchar)(node) + (mat)->valoffset))

#define	CV_NORMAL 16

#define	CV_ORIENTED_GRAPH (CV_SEQ_KIND_GRAPH\|CV_GRAPH_FLAG_ORIENTED)

#define	CV_PCA_DATA_AS_COL 1

#define	CV_PCA_DATA_AS_ROW 0

#define	CV_PCA_USE_AVG 2

#define	CV_PREV_POINT(reader) (((CvPoint)((reader).prev_elem)))

#define	CV_PREV_SEQ_ELEM(elem_size, reader)

#define	CV_QR 4

#define	CV_RAND_NORMAL 1

#define	CV_RAND_UNI 0

#define	CV_READ_CHAIN_POINT(_pt, reader)

#define	CV_READ_EDGE(pt1, pt2, reader)

#define	CV_READ_SEQ_ELEM(elem, reader)

#define	CV_REV_READ_SEQ_ELEM(elem, reader)

#define	CV_RNG_COEFF 4164903690U

#define	CV_SEQ_CHAIN (CV_SEQ_KIND_CURVE \| CV_SEQ_ELTYPE_CODE)

#define	CV_SEQ_CHAIN_CONTOUR (CV_SEQ_FLAG_CLOSED \| CV_SEQ_CHAIN)

#define	CV_SEQ_CONNECTED_COMP (CV_SEQ_KIND_GENERIC \| CV_SEQ_ELTYPE_CONNECTED_COMP)

#define	CV_SEQ_CONTOUR CV_SEQ_POLYGON

#define	CV_SEQ_ELEM(seq, elem_type, index)

#define	CV_SEQ_ELTYPE(seq) ((seq)->flags & CV_SEQ_ELTYPE_MASK)

#define	CV_SEQ_ELTYPE_BITS 12

#define	CV_SEQ_ELTYPE_CODE CV_8UC1

#define	CV_SEQ_ELTYPE_CONNECTED_COMP 0

#define	CV_SEQ_ELTYPE_GENERIC 0

#define	CV_SEQ_ELTYPE_GRAPH_EDGE 0

#define	CV_SEQ_ELTYPE_GRAPH_VERTEX 0

#define	CV_SEQ_ELTYPE_INDEX CV_32SC1

#define	CV_SEQ_ELTYPE_MASK ((1 << CV_SEQ_ELTYPE_BITS) - 1)

#define	CV_SEQ_ELTYPE_POINT CV_32SC2

#define	CV_SEQ_ELTYPE_POINT3D CV_32FC3

#define	CV_SEQ_ELTYPE_PPOINT CV_SEQ_ELTYPE_PTR

#define	CV_SEQ_ELTYPE_PTR CV_USRTYPE1

#define	CV_SEQ_ELTYPE_TRIAN_ATR 0

#define	CV_SEQ_FLAG_CLOSED (1 << CV_SEQ_FLAG_SHIFT)

#define	CV_SEQ_FLAG_CONVEX (0 << CV_SEQ_FLAG_SHIFT)

#define	CV_SEQ_FLAG_HOLE (2 << CV_SEQ_FLAG_SHIFT)

#define	CV_SEQ_FLAG_SHIFT (CV_SEQ_KIND_BITS + CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_FLAG_SIMPLE (0 << CV_SEQ_FLAG_SHIFT)

#define	CV_SEQ_INDEX (CV_SEQ_KIND_GENERIC \| CV_SEQ_ELTYPE_INDEX)

#define	CV_SEQ_KIND(seq) ((seq)->flags & CV_SEQ_KIND_MASK )

#define	CV_SEQ_KIND_BIN_TREE (2 << CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_KIND_BITS 2

#define	CV_SEQ_KIND_CURVE (1 << CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_KIND_GENERIC (0 << CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_KIND_GRAPH (1 << CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_KIND_MASK (((1 << CV_SEQ_KIND_BITS) - 1)<<CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_KIND_SUBDIV2D (2 << CV_SEQ_ELTYPE_BITS)

#define	CV_SEQ_MAGIC_VAL 0x42990000

#define	CV_SEQ_POINT3D_SET (CV_SEQ_KIND_GENERIC\| CV_SEQ_ELTYPE_POINT3D)

#define	CV_SEQ_POINT_SET (CV_SEQ_KIND_GENERIC\| CV_SEQ_ELTYPE_POINT)

#define	CV_SEQ_POLYGON (CV_SEQ_FLAG_CLOSED \| CV_SEQ_POLYLINE )

#define	CV_SEQ_POLYGON_TREE (CV_SEQ_KIND_BIN_TREE \| CV_SEQ_ELTYPE_TRIAN_ATR)

#define	CV_SEQ_POLYLINE (CV_SEQ_KIND_CURVE \| CV_SEQ_ELTYPE_POINT)

#define	CV_SEQ_READER_FIELDS()

#define	CV_SEQ_SIMPLE_POLYGON (CV_SEQ_FLAG_SIMPLE \| CV_SEQ_POLYGON )

#define	CV_SEQ_WRITER_FIELDS()

#define	CV_SEQUENCE_FIELDS()

#define	CV_SET_ELEM_FIELDS(elem_type)
	Set Order is not preserved. There can be gaps between sequence elements. After the element has been inserted it stays in the same place all the time. The MSB(most-significant or sign bit) of the first field (flags) is 0 iff the element exists. More...

#define	CV_SET_ELEM_FREE_FLAG (1 << (sizeof(int)*8-1))

#define	CV_SET_ELEM_IDX_MASK ((1 << 26) - 1)

#define	CV_SET_FIELDS()

#define	CV_SET_MAGIC_VAL 0x42980000

#define	CV_SIGN(a) CV_CMP((a),0)

#define	CV_SORT_ASCENDING 0

#define	CV_SORT_DESCENDING 16

#define	CV_SORT_EVERY_COLUMN 1

#define	CV_SORT_EVERY_ROW 0

#define	CV_SPARSE_MAT_MAGIC_VAL 0x42440000

#define	CV_STORAGE_APPEND 2

#define	CV_STORAGE_BASE64 64

#define	CV_STORAGE_FORMAT_AUTO 0

#define	CV_STORAGE_FORMAT_JSON 24

#define	CV_STORAGE_FORMAT_MASK (7<<3)

#define	CV_STORAGE_FORMAT_XML 8

#define	CV_STORAGE_FORMAT_YAML 16

#define	CV_STORAGE_MAGIC_VAL 0x42890000

#define	CV_STORAGE_MEMORY 4

#define	CV_STORAGE_READ 0

#define	CV_STORAGE_WRITE 1

#define	CV_STORAGE_WRITE_BASE64 (CV_STORAGE_BASE64 \| CV_STORAGE_WRITE)

#define	CV_STORAGE_WRITE_BINARY CV_STORAGE_WRITE

#define	CV_STORAGE_WRITE_TEXT CV_STORAGE_WRITE

#define	CV_SVD 1

#define	CV_SVD_MODIFY_A 1

#define	CV_SVD_SYM 2

#define	CV_SVD_U_T 2

#define	CV_SVD_V_T 4

#define	CV_SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t))

#define	CV_TERMCRIT_EPS 2

#define	CV_TERMCRIT_ITER 1

#define	CV_TERMCRIT_NUMBER CV_TERMCRIT_ITER

#define	CV_TREE_NODE_FIELDS(node_type)

#define	CV_TURN_ON_IPL_COMPATIBILITY()

#define	CV_TYPE_NAME_IMAGE "opencv-image"

#define	CV_TYPE_NAME_MAT "opencv-matrix"

#define	CV_TYPE_NAME_MATND "opencv-nd-matrix"

#define	CV_TYPE_NAME_SEQ "opencv-sequence"

#define	CV_TYPE_NAME_SEQ_TREE "opencv-sequence-tree"

#define	CV_TYPE_NAME_SPARSE_MAT "opencv-sparse-matrix"

#define	CV_WHOLE_ARR cvSlice( 0, 0x3fffffff )

#define	CV_WHOLE_SEQ cvSlice(0, CV_WHOLE_SEQ_END_INDEX)

#define	CV_WHOLE_SEQ_END_INDEX 0x3fffffff

#define	CV_WRITE_SEQ_ELEM(elem, writer)

#define	CV_WRITE_SEQ_ELEM_VAR(elem_ptr, writer)

#define	cvAbs(src, dst) cvAbsDiffS( (src), (dst), cvScalarAll(0))

#define	cvAXPY(A, real_scalar, B, C) cvScaleAdd(A, cvRealScalar(real_scalar), B, C)

#define	cvCheckArray cvCheckArr

#define	cvConvert(src, dst) cvConvertScale( (src), (dst), 1, 0 )

#define	cvCvtScale cvConvertScale

#define	cvCvtScaleAbs cvConvertScaleAbs

#define	cvFFT cvDFT

#define	cvFree(ptr) (cvFree_((ptr)), (ptr)=0)

#define	cvGetGraphVtx(graph, idx) (CvGraphVtx)cvGetSetElem((CvSet)(graph), (idx))

#define	cvGetSubArr cvGetSubRect

#define	cvGraphEdgeIdx(graph, edge) ((edge)->flags & CV_SET_ELEM_IDX_MASK)

#define	cvGraphFindEdge cvFindGraphEdge

#define	cvGraphFindEdgeByPtr cvFindGraphEdgeByPtr

#define	cvGraphGetEdgeCount(graph) ((graph)->edges->active_count)

#define	cvGraphGetVtxCount(graph) ((graph)->active_count)

#define	cvGraphVtxIdx(graph, vtx) ((vtx)->flags & CV_SET_ELEM_IDX_MASK)

#define	cvInv cvInvert

#define	cvInvSqrt(value) ((float)(1./sqrt(value)))

#define	cvMahalonobis cvMahalanobis

#define	cvMatMul(src1, src2, dst) cvMatMulAdd( (src1), (src2), NULL, (dst))

#define	cvMatMulAdd(src1, src2, src3, dst) cvGEMM( (src1), (src2), 1., (src3), 1., (dst), 0 )

#define	cvMatMulAddEx cvGEMM

#define	cvMatMulAddS cvTransform

#define	cvMirror cvFlip

#define	cvReshapeND(arr, header, new_cn, new_dims, new_sizes)

#define	cvScale cvConvertScale

#define	cvSqrt(value) ((float)sqrt(value))

#define	cvT cvTranspose

#define	cvZero cvSetZero

#define	IPL2CV_DEPTH(depth)

#define	IPL_ALIGN_16BYTES 16

#define	IPL_ALIGN_32BYTES 32

#define	IPL_ALIGN_4BYTES 4

#define	IPL_ALIGN_8BYTES 8

#define	IPL_ALIGN_DWORD IPL_ALIGN_4BYTES

#define	IPL_ALIGN_QWORD IPL_ALIGN_8BYTES

#define	IPL_BORDER_CONSTANT 0

#define	IPL_BORDER_REFLECT 2

#define	IPL_BORDER_REFLECT_101 4

#define	IPL_BORDER_REPLICATE 1

#define	IPL_BORDER_TRANSPARENT 5

#define	IPL_BORDER_WRAP 3

#define	IPL_DATA_ORDER_PIXEL 0

#define	IPL_DATA_ORDER_PLANE 1

#define	IPL_DEPTH_16S (IPL_DEPTH_SIGN\|16)

#define	IPL_DEPTH_16U 16

#define	IPL_DEPTH_1U 1

#define	IPL_DEPTH_32F 32

#define	IPL_DEPTH_32S (IPL_DEPTH_SIGN\|32)

#define	IPL_DEPTH_64F 64

#define	IPL_DEPTH_8S (IPL_DEPTH_SIGN\| 8)

#define	IPL_DEPTH_8U 8

#define	IPL_DEPTH_SIGN 0x80000000

#define	IPL_IMAGE_DATA 2

#define	IPL_IMAGE_HEADER 1

#define	IPL_IMAGE_MAGIC_VAL ((int)sizeof(IplImage))

#define	IPL_IMAGE_ROI 4

#define	IPL_ORIGIN_BL 1

#define	IPL_ORIGIN_TL 0

#define	OPENCV_ASSERT(expr, func, context)

#define	OPENCV_CALL(Func)

#define	OPENCV_ERROR(status, func, context) cvError((status),(func),(context),__FILE__,__LINE__)

Typedefs
typedef void(CV_STDCALL *	Cv_iplAllocateImageData) (IplImage *, int, int)

typedef IplImage (CV_STDCALL	Cv_iplCloneImage) (const IplImage *)

typedef IplImage (CV_STDCALL	Cv_iplCreateImageHeader) (int, int, int, char , char , int, int, int, int, int, IplROI , IplImage , void , IplTileInfo )

typedef IplROI (CV_STDCALL	Cv_iplCreateROI) (int, int, int, int, int)

typedef void(CV_STDCALL *	Cv_iplDeallocate) (IplImage *, int)

typedef void	CvArr
	This is the "metatype" used only as a function parameter. More...

typedef void (	CvCloneFunc) (const void *struct_ptr)

typedef int(*	CvCmpFunc) (const void a, const void b, void *userdata)

typedef int(*	CvErrorCallback) (int status, const char func_name, const char err_msg, const char file_name, int line, void userdata)

typedef struct CvGenericHash	CvFileNodeHash

typedef struct CvFileStorage	CvFileStorage
	"black box" representation of the file storage associated with a file on disk. More...

typedef struct CvFileStorage	CvFileStorage

typedef int	CvHistType

typedef int(*	CvIsInstanceFunc) (const void *struct_ptr)

typedef CvContour	CvPoint2DSeq

typedef void (	CvReadFunc) (CvFileStorage storage, CvFileNode node)

typedef void(*	CvReleaseFunc) (void **struct_dblptr)

typedef uint64	CvRNG

typedef int	CVStatus

typedef void(*	CvWriteFunc) (CvFileStorage storage, const char name, const void *struct_ptr, CvAttrList attributes)

typedef struct _IplTileInfo	IplTileInfo

Enumerations
enum	{ CV_StsOk = 0, CV_StsBackTrace = -1, CV_StsError = -2, CV_StsInternal = -3, CV_StsNoMem = -4, CV_StsBadArg = -5, CV_StsBadFunc = -6, CV_StsNoConv = -7, CV_StsAutoTrace = -8, CV_HeaderIsNull = -9, CV_BadImageSize = -10, CV_BadOffset = -11, CV_BadDataPtr = -12, CV_BadStep = -13, CV_BadModelOrChSeq = -14, CV_BadNumChannels = -15, CV_BadNumChannel1U = -16, CV_BadDepth = -17, CV_BadAlphaChannel = -18, CV_BadOrder = -19, CV_BadOrigin = -20, CV_BadAlign = -21, CV_BadCallBack = -22, CV_BadTileSize = -23, CV_BadCOI = -24, CV_BadROISize = -25, CV_MaskIsTiled = -26, CV_StsNullPtr = -27, CV_StsVecLengthErr = -28, CV_StsFilterStructContentErr = -29, CV_StsKernelStructContentErr = -30, CV_StsFilterOffsetErr = -31, CV_StsBadSize = -201, CV_StsDivByZero = -202, CV_StsInplaceNotSupported = -203, CV_StsObjectNotFound = -204, CV_StsUnmatchedFormats = -205, CV_StsBadFlag = -206, CV_StsBadPoint = -207, CV_StsBadMask = -208, CV_StsUnmatchedSizes = -209, CV_StsUnsupportedFormat = -210, CV_StsOutOfRange = -211, CV_StsParseError = -212, CV_StsNotImplemented = -213, CV_StsBadMemBlock = -214, CV_StsAssert = -215, CV_GpuNotSupported = -216, CV_GpuApiCallError = -217, CV_OpenGlNotSupported = -218, CV_OpenGlApiCallError = -219, CV_OpenCLApiCallError = -220, CV_OpenCLDoubleNotSupported = -221, CV_OpenCLInitError = -222, CV_OpenCLNoAMDBlasFft = -223 }

Functions
	CvMat::CvMat (const cv::Mat &m)

void	cvAbsDiff (const CvArr src1, const CvArr src2, CvArr *dst)

void	cvAbsDiffS (const CvArr src, CvArr dst, CvScalar value)

void	cvAdd (const CvArr src1, const CvArr src2, CvArr dst, const CvArr mask=NULL)

void	cvAddS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

void	cvAddWeighted (const CvArr src1, double alpha, const CvArr src2, double beta, double gamma, CvArr *dst)

void *	cvAlloc (size_t size)

void	cvAnd (const CvArr src1, const CvArr src2, CvArr dst, const CvArr mask=NULL)

void	cvAndS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

CvAttrList	cvAttrList (const char *attr=NULL, CvAttrList next=NULL)

const char *	cvAttrValue (const CvAttrList attr, const char attr_name)

CvScalar	cvAvg (const CvArr arr, const CvArr mask=NULL)

void	cvAvgSdv (const CvArr arr, CvScalar mean, CvScalar std_dev, const CvArr mask=NULL)

void	cvBackProjectPCA (const CvArr proj, const CvArr mean, const CvArr eigenvects, CvArr result)

void	cvCalcCovarMatrix (const CvArr *vects, int count, CvArr cov_mat, CvArr *avg, int flags)

void	cvCalcPCA (const CvArr data, CvArr mean, CvArr eigenvals, CvArr eigenvects, int flags)

void	cvCartToPolar (const CvArr x, const CvArr y, CvArr magnitude, CvArr angle=NULL, int angle_in_degrees=0)

float	cvCbrt (float value)

void	cvChangeSeqBlock (void *reader, int direction)

int	cvCheckArr (const CvArr *arr, int flags=0, double min_val=0, double max_val=0)

int	cvCheckHardwareSupport (int feature)

CvTermCriteria	cvCheckTermCriteria (CvTermCriteria criteria, double default_eps, int default_max_iters)

void	cvClearGraph (CvGraph *graph)

void	cvClearMemStorage (CvMemStorage *storage)

void	cvClearND (CvArr arr, const int idx)

void	cvClearSeq (CvSeq *seq)

void	cvClearSet (CvSet *set_header)

void *	cvClone (const void *struct_ptr)
	Makes a clone of an object. More...

CvGraph *	cvCloneGraph (const CvGraph graph, CvMemStorage storage)

IplImage *	cvCloneImage (const IplImage *image)

CvMat *	cvCloneMat (const CvMat *mat)

CvMatND *	cvCloneMatND (const CvMatND *mat)

CvSeq *	cvCloneSeq (const CvSeq seq, CvMemStorage storage=NULL)

CvSparseMat *	cvCloneSparseMat (const CvSparseMat *mat)

void	cvCmp (const CvArr src1, const CvArr src2, CvArr *dst, int cmp_op)

void	cvCmpS (const CvArr src, double value, CvArr dst, int cmp_op)

void	cvCompleteSymm (CvMat *matrix, int LtoR=0)

void	cvConvertScale (const CvArr src, CvArr dst, double scale=1, double shift=0)
	Converts one array to another with optional linear transformation. More...

void	cvConvertScaleAbs (const CvArr src, CvArr dst, double scale=1, double shift=0)

void	cvCopy (const CvArr src, CvArr dst, const CvArr *mask=NULL)
	Copies one array to another. More...

int	cvCountNonZero (const CvArr *arr)

CvMemStorage *	cvCreateChildMemStorage (CvMemStorage *parent)

void	cvCreateData (CvArr *arr)
	Allocates array data. More...

CvGraph *	cvCreateGraph (int graph_flags, int header_size, int vtx_size, int edge_size, CvMemStorage *storage)

CvGraphScanner *	cvCreateGraphScanner (CvGraph graph, CvGraphVtx vtx=NULL, int mask=-1)

IplImage *	cvCreateImage (CvSize size, int depth, int channels)
	Creates an image header and allocates the image data. More...

IplImage *	cvCreateImageHeader (CvSize size, int depth, int channels)
	Creates an image header but does not allocate the image data. More...

CvMat *	cvCreateMat (int rows, int cols, int type)
	Creates a matrix header and allocates the matrix data. More...

CvMat *	cvCreateMatHeader (int rows, int cols, int type)
	Creates a matrix header but does not allocate the matrix data. More...

CvMatND *	cvCreateMatND (int dims, const int *sizes, int type)
	Creates the header and allocates the data for a multi-dimensional dense array. More...

CvMatND *	cvCreateMatNDHeader (int dims, const int *sizes, int type)
	Creates a new matrix header but does not allocate the matrix data. More...

CvMemStorage *	cvCreateMemStorage (int block_size=0)

CvSeq *	cvCreateSeq (int seq_flags, size_t header_size, size_t elem_size, CvMemStorage *storage)

void	cvCreateSeqBlock (CvSeqWriter *writer)

CvSet *	cvCreateSet (int set_flags, int header_size, int elem_size, CvMemStorage *storage)

CvSparseMat *	cvCreateSparseMat (int dims, const int *sizes, int type)
	Creates sparse array. More...

CvSparseMat *	cvCreateSparseMat (const cv::SparseMat &m)

void	cvCrossProduct (const CvArr src1, const CvArr src2, CvArr *dst)
	Calculates the cross product of two 3D vectors. More...

void *	cvCvtSeqToArray (const CvSeq seq, void elements, CvSlice slice=CV_WHOLE_SEQ)

void	cvDCT (const CvArr src, CvArr dst, int flags)

void	cvDecRefData (CvArr *arr)
	Decrements an array data reference counter. More...

double	cvDet (const CvArr *mat)

void	cvDFT (const CvArr src, CvArr dst, int flags, int nonzero_rows=0)

void	cvDiv (const CvArr src1, const CvArr src2, CvArr *dst, double scale=1)

double	cvDotProduct (const CvArr src1, const CvArr src2)
	Calculates the dot product of two arrays in Euclidean metrics. More...

void	cvEigenVV (CvArr mat, CvArr evects, CvArr *evals, double eps=0, int lowindex=-1, int highindex=-1)

CvSeq *	cvEndWriteSeq (CvSeqWriter *writer)

void	cvEndWriteStruct (CvFileStorage *fs)
	Finishes writing to a file node collection. More...

void	cvError (int status, const char func_name, const char err_msg, const char *file_name, int line)

int	cvErrorFromIppStatus (int ipp_status)

const char *	cvErrorStr (int status)

void	cvExp (const CvArr src, CvArr dst)

float	cvFastArctan (float y, float x)

CvGraphEdge *	cvFindGraphEdge (const CvGraph *graph, int start_idx, int end_idx)

CvGraphEdge *	cvFindGraphEdgeByPtr (const CvGraph graph, const CvGraphVtx start_vtx, const CvGraphVtx *end_vtx)

CvTypeInfo *	cvFindType (const char *type_name)
	Finds a type by its name. More...

CvTypeInfo *	cvFirstType (void)
	Returns the beginning of a type list. More...

void	cvFlip (const CvArr src, CvArr dst=NULL, int flip_mode=0)

void	cvFlushSeqWriter (CvSeqWriter *writer)

void	cvFree_ (void *ptr)

void	cvGEMM (const CvArr src1, const CvArr src2, double alpha, const CvArr src3, double beta, CvArr dst, int tABC=0)

CvScalar	cvGet1D (const CvArr *arr, int idx0)
	Return a specific array element. More...

CvScalar	cvGet2D (const CvArr *arr, int idx0, int idx1)

CvScalar	cvGet3D (const CvArr *arr, int idx0, int idx1, int idx2)

CvMat *	cvGetCol (const CvArr arr, CvMat submat, int col)

CvMat *	cvGetCols (const CvArr arr, CvMat submat, int start_col, int end_col)
	Returns one of more array columns. More...

CvMat *	cvGetDiag (const CvArr arr, CvMat submat, int diag=0)
	Returns one of array diagonals. More...

int	cvGetDims (const CvArr arr, int sizes=NULL)
	Return number of array dimensions. More...

int	cvGetDimSize (const CvArr *arr, int index)
	Returns array size along the specified dimension. More...

int	cvGetElemType (const CvArr *arr)
	Returns type of array elements. More...

int	cvGetErrInfo (const char errcode_desc, const char description, const char *filename, int line)

int	cvGetErrMode (void)

int	cvGetErrStatus (void)

CvFileNode *	cvGetFileNode (CvFileStorage fs, CvFileNode map, const CvStringHashNode *key, int create_missing=0)
	Finds a node in a map or file storage. More...

CvFileNode *	cvGetFileNodeByName (const CvFileStorage fs, const CvFileNode map, const char *name)
	Finds a node in a map or file storage. More...

const char *	cvGetFileNodeName (const CvFileNode *node)
	Returns the name of a file node. More...

CvStringHashNode *	cvGetHashedKey (CvFileStorage fs, const char name, int len=-1, int create_missing=0)
	Returns a unique pointer for a given name. More...

IplImage *	cvGetImage (const CvArr arr, IplImage image_header)
	Returns image header for arbitrary array. More...

int	cvGetImageCOI (const IplImage *image)
	Returns the index of the channel of interest. More...

CvRect	cvGetImageROI (const IplImage *image)
	Returns the image ROI. More...

CvMat *	cvGetMat (const CvArr arr, CvMat header, int *coi=NULL, int allowND=0)
	Returns matrix header for arbitrary array. More...

CvScalar	cvGetND (const CvArr arr, const int idx)

CvSparseNode *	cvGetNextSparseNode (CvSparseMatIterator *mat_iterator)
	Returns the next sparse matrix element. More...

int	cvGetNumThreads (void)

int	cvGetOptimalDFTSize (int size0)

void	cvGetRawData (const CvArr arr, uchar data, int step=NULL, CvSize *roi_size=NULL)
	Retrieves low-level information about the array. More...

double	cvGetReal1D (const CvArr *arr, int idx0)
	Return a specific element of single-channel 1D, 2D, 3D or nD array. More...

double	cvGetReal2D (const CvArr *arr, int idx0, int idx1)

double	cvGetReal3D (const CvArr *arr, int idx0, int idx1, int idx2)

double	cvGetRealND (const CvArr arr, const int idx)

CvFileNode *	cvGetRootFileNode (const CvFileStorage *fs, int stream_index=0)
	Retrieves one of the top-level nodes of the file storage. More...

CvMat *	cvGetRow (const CvArr arr, CvMat submat, int row)

CvMat *	cvGetRows (const CvArr arr, CvMat submat, int start_row, int end_row, int delta_row=1)
	Returns array row or row span. More...

schar *	cvGetSeqElem (const CvSeq *seq, int index)

int	cvGetSeqReaderPos (CvSeqReader *reader)

CvSetElem *	cvGetSetElem (const CvSet *set_header, int idx)

CvSize	cvGetSize (const CvArr *arr)
	Returns size of matrix or image ROI. More...

CvMat *	cvGetSubRect (const CvArr arr, CvMat submat, CvRect rect)
	Returns matrix header corresponding to the rectangular sub-array of input image or matrix. More...

int	cvGetThreadNum (void)

int64	cvGetTickCount (void)

double	cvGetTickFrequency (void)

int	cvGraphAddEdge (CvGraph graph, int start_idx, int end_idx, const CvGraphEdge edge=NULL, CvGraphEdge **inserted_edge=NULL)

int	cvGraphAddEdgeByPtr (CvGraph graph, CvGraphVtx start_vtx, CvGraphVtx end_vtx, const CvGraphEdge edge=NULL, CvGraphEdge **inserted_edge=NULL)

int	cvGraphAddVtx (CvGraph graph, const CvGraphVtx vtx=NULL, CvGraphVtx **inserted_vtx=NULL)

void	cvGraphRemoveEdge (CvGraph *graph, int start_idx, int end_idx)

void	cvGraphRemoveEdgeByPtr (CvGraph graph, CvGraphVtx start_vtx, CvGraphVtx *end_vtx)

int	cvGraphRemoveVtx (CvGraph *graph, int index)

int	cvGraphRemoveVtxByPtr (CvGraph graph, CvGraphVtx vtx)

int	cvGraphVtxDegree (const CvGraph *graph, int vtx_idx)

int	cvGraphVtxDegreeByPtr (const CvGraph graph, const CvGraphVtx vtx)

int	cvGuiBoxReport (int status, const char func_name, const char err_msg, const char file_name, int line, void userdata)

int	cvIncRefData (CvArr *arr)
	Increments array data reference counter. More...

IplImage *	cvInitImageHeader (IplImage *image, CvSize size, int depth, int channels, int origin=0, int align=4)
	Initializes an image header that was previously allocated. More...

CvMat *	cvInitMatHeader (CvMat mat, int rows, int cols, int type, void data=NULL, int step=0x7fffffff)
	Initializes a pre-allocated matrix header. More...

CvMatND *	cvInitMatNDHeader (CvMatND mat, int dims, const int sizes, int type, void *data=NULL)
	Initializes a pre-allocated multi-dimensional array header. More...

int	cvInitNArrayIterator (int count, CvArr *arrs, const CvArr mask, CvMatND stubs, CvNArrayIterator array_iterator, int flags=0)

CvSparseNode *	cvInitSparseMatIterator (const CvSparseMat mat, CvSparseMatIterator mat_iterator)
	Initializes sparse array elements iterator. More...

void	cvInitTreeNodeIterator (CvTreeNodeIterator tree_iterator, const void first, int max_level)

void	cvInRange (const CvArr src, const CvArr lower, const CvArr upper, CvArr dst)

void	cvInRangeS (const CvArr src, CvScalar lower, CvScalar upper, CvArr dst)

void	cvInsertNodeIntoTree (void node, void parent, void *frame)

double	cvInvert (const CvArr src, CvArr dst, int method=0)

int	cvIplDepth (int type)

int	cvKMeans2 (const CvArr samples, int cluster_count, CvArr labels, CvTermCriteria termcrit, int attempts=1, CvRNG rng=0, int flags=0, CvArr _centers=0, double *compactness=0)

void *	cvLoad (const char filename, CvMemStorage memstorage=NULL, const char name=NULL, const char *real_name=NULL)
	Loads an object from a file. More...

void	cvLog (const CvArr src, CvArr dst)

void	cvLUT (const CvArr src, CvArr dst, const CvArr *lut)

double	cvMahalanobis (const CvArr vec1, const CvArr vec2, const CvArr *mat)

CvSeq *	cvMakeSeqHeaderForArray (int seq_type, int header_size, int elem_size, void elements, int total, CvSeq seq, CvSeqBlock *block)

CvMat	cvMat (int rows, int cols, int type, void *data=NULL)

void	cvMax (const CvArr src1, const CvArr src2, CvArr *dst)

void	cvMaxS (const CvArr src, double value, CvArr dst)

void *	cvMemStorageAlloc (CvMemStorage *storage, size_t size)

CvString	cvMemStorageAllocString (CvMemStorage storage, const char ptr, int len=-1)

void	cvMerge (const CvArr src0, const CvArr src1, const CvArr src2, const CvArr src3, CvArr *dst)

double	cvmGet (const CvMat *mat, int row, int col)
	Returns the particular element of single-channel floating-point matrix. More...

void	cvMin (const CvArr src1, const CvArr src2, CvArr *dst)

void	cvMinMaxLoc (const CvArr arr, double min_val, double max_val, CvPoint min_loc=NULL, CvPoint max_loc=NULL, const CvArr mask=NULL)

void	cvMinS (const CvArr src, double value, CvArr dst)

void	cvMixChannels (const CvArr src, int src_count, CvArr dst, int dst_count, const int *from_to, int pair_count)

void	cvmSet (CvMat *mat, int row, int col, double value)
	Sets a specific element of a single-channel floating-point matrix. More...

void	cvMul (const CvArr src1, const CvArr src2, CvArr *dst, double scale=1)

void	cvMulSpectrums (const CvArr src1, const CvArr src2, CvArr *dst, int flags)

void	cvMulTransposed (const CvArr src, CvArr dst, int order, const CvArr *delta=NULL, double scale=1.)

int	cvNextGraphItem (CvGraphScanner *scanner)

int	cvNextNArraySlice (CvNArrayIterator *array_iterator)

void *	cvNextTreeNode (CvTreeNodeIterator *tree_iterator)

double	cvNorm (const CvArr arr1, const CvArr arr2=NULL, int norm_type=4, const CvArr *mask=NULL)

void	cvNormalize (const CvArr src, CvArr dst, double a=1., double b=0., int norm_type=4, const CvArr *mask=NULL)

void	cvNot (const CvArr src, CvArr dst)

int	cvNulDevReport (int status, const char func_name, const char err_msg, const char file_name, int line, void userdata)

CvFileStorage *	cvOpenFileStorage (const char filename, CvMemStorage memstorage, int flags, const char *encoding=NULL)
	Opens file storage for reading or writing data. More...

void	cvOr (const CvArr src1, const CvArr src2, CvArr dst, const CvArr mask=NULL)

void	cvOrS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

void	cvPerspectiveTransform (const CvArr src, CvArr dst, const CvMat *mat)

CvPoint	cvPoint (int x, int y)

CvPoint2D32f	cvPoint2D32f (double x, double y)

CvPoint2D64f	cvPoint2D64f (double x, double y)

CvPoint3D32f	cvPoint3D32f (double x, double y, double z)

CvPoint3D64f	cvPoint3D64f (double x, double y, double z)

CvPoint	cvPointFrom32f (CvPoint2D32f point)

CvPoint2D32f	cvPointTo32f (CvPoint point)

void	cvPolarToCart (const CvArr magnitude, const CvArr angle, CvArr x, CvArr y, int angle_in_degrees=0)

void	cvPow (const CvArr src, CvArr dst, double power)

void *	cvPrevTreeNode (CvTreeNodeIterator *tree_iterator)

void	cvProjectPCA (const CvArr data, const CvArr mean, const CvArr eigenvects, CvArr result)

uchar *	cvPtr1D (const CvArr arr, int idx0, int type=NULL)
	Return pointer to a particular array element. More...

uchar *	cvPtr2D (const CvArr arr, int idx0, int idx1, int type=NULL)

uchar *	cvPtr3D (const CvArr arr, int idx0, int idx1, int idx2, int type=NULL)

uchar *	cvPtrND (const CvArr arr, const int idx, int type=NULL, int create_node=1, unsigned precalc_hashval=NULL)

void	cvRandArr (CvRNG rng, CvArr arr, int dist_type, CvScalar param1, CvScalar param2)
	Fills an array with random numbers and updates the RNG state. More...

unsigned	cvRandInt (CvRNG *rng)
	Returns a 32-bit unsigned integer and updates RNG. More...

double	cvRandReal (CvRNG *rng)
	Returns a floating-point random number and updates RNG. More...

void	cvRandShuffle (CvArr mat, CvRNG rng, double iter_factor=1.)

CvArr *	cvRange (CvArr *mat, double start, double end)

void	cvRawDataToScalar (const void data, int type, CvScalar scalar)

void *	cvRead (CvFileStorage fs, CvFileNode node, CvAttrList *attributes=NULL)
	Decodes an object and returns a pointer to it. More...

void *	cvReadByName (CvFileStorage fs, const CvFileNode map, const char name, CvAttrList attributes=NULL)
	Finds an object by name and decodes it. More...

int	cvReadInt (const CvFileNode *node, int default_value=0)
	Retrieves an integer value from a file node. More...

int	cvReadIntByName (const CvFileStorage fs, const CvFileNode map, const char *name, int default_value=0)
	Finds a file node and returns its value. More...

void	cvReadRawData (const CvFileStorage fs, const CvFileNode src, void dst, const char dt)
	Reads multiple numbers. More...

void	cvReadRawDataSlice (const CvFileStorage fs, CvSeqReader reader, int count, void dst, const char dt)
	Initializes file node sequence reader. More...

double	cvReadReal (const CvFileNode *node, double default_value=0.)
	Retrieves a floating-point value from a file node. More...

double	cvReadRealByName (const CvFileStorage fs, const CvFileNode map, const char *name, double default_value=0.)
	Finds a file node and returns its value. More...

const char *	cvReadString (const CvFileNode node, const char default_value=NULL)
	Retrieves a text string from a file node. More...

const char *	cvReadStringByName (const CvFileStorage fs, const CvFileNode map, const char name, const char default_value=NULL)
	Finds a file node by its name and returns its value. More...

CvScalar	cvRealScalar (double val0)

CvRect	cvRect (int x, int y, int width, int height)

IplROI	cvRectToROI (CvRect rect, int coi)

CvErrorCallback	cvRedirectError (CvErrorCallback error_handler, void userdata=NULL, void *prev_userdata=NULL)

void	cvReduce (const CvArr src, CvArr dst, int dim=-1, int op=0)

void	cvRegisterType (const CvTypeInfo *info)
	Registers a new type. More...

void	cvRelease (void **struct_ptr)
	Releases an object. More...

void	cvReleaseData (CvArr *arr)
	Releases array data. More...

void	cvReleaseFileStorage (CvFileStorage **fs)
	Releases file storage. More...

void	cvReleaseGraphScanner (CvGraphScanner **scanner)

void	cvReleaseImage (IplImage **image)
	Deallocates the image header and the image data. More...

void	cvReleaseImageHeader (IplImage **image)
	Deallocates an image header. More...

void	cvReleaseMat (CvMat **mat)
	Deallocates a matrix. More...

void	cvReleaseMatND (CvMatND **mat)
	Deallocates a multi-dimensional array. More...

void	cvReleaseMemStorage (CvMemStorage **storage)

void	cvReleaseSparseMat (CvSparseMat **mat)
	Deallocates sparse array. More...

void	cvRemoveNodeFromTree (void node, void frame)

void	cvRepeat (const CvArr src, CvArr dst)

void	cvResetImageROI (IplImage *image)
	Resets the image ROI to include the entire image and releases the ROI structure. More...

CvMat *	cvReshape (const CvArr arr, CvMat header, int new_cn, int new_rows=0)
	Changes shape of matrix/image without copying data. More...

CvArr *	cvReshapeMatND (const CvArr arr, int sizeof_header, CvArr header, int new_cn, int new_dims, int *new_sizes)
	Changes the shape of a multi-dimensional array without copying the data. More...

void	cvRestoreMemStoragePos (CvMemStorage storage, CvMemStoragePos pos)

CvRNG	cvRNG (int64 seed=-1)
	Initializes a random number generator state. More...

CvRect	cvROIToRect (IplROI roi)

void	cvSave (const char filename, const void struct_ptr, const char name=NULL, const char comment=NULL, CvAttrList attributes=cvAttrList())
	Saves an object to a file. More...

void	cvSaveMemStoragePos (const CvMemStorage storage, CvMemStoragePos pos)

CvScalar	cvScalar (double val0, double val1=0, double val2=0, double val3=0)

CvScalar	cvScalarAll (double val0123)

void	cvScalarToRawData (const CvScalar scalar, void data, int type, int extend_to_12=0)

void	cvScaleAdd (const CvArr src1, CvScalar scale, const CvArr src2, CvArr *dst)

int	cvSeqElemIdx (const CvSeq seq, const void element, CvSeqBlock **block=NULL)

schar *	cvSeqInsert (CvSeq seq, int before_index, const void element=NULL)

void	cvSeqInsertSlice (CvSeq seq, int before_index, const CvArr from_arr)

void	cvSeqInvert (CvSeq *seq)

int	cvSeqPartition (const CvSeq seq, CvMemStorage storage, CvSeq *labels, CvCmpFunc is_equal, void userdata)

void	cvSeqPop (CvSeq seq, void element=NULL)

void	cvSeqPopFront (CvSeq seq, void element=NULL)

void	cvSeqPopMulti (CvSeq seq, void elements, int count, int in_front=0)

schar *	cvSeqPush (CvSeq seq, const void element=NULL)

schar *	cvSeqPushFront (CvSeq seq, const void element=NULL)

void	cvSeqPushMulti (CvSeq seq, const void elements, int count, int in_front=0)

void	cvSeqRemove (CvSeq *seq, int index)

void	cvSeqRemoveSlice (CvSeq *seq, CvSlice slice)

schar *	cvSeqSearch (CvSeq seq, const void elem, CvCmpFunc func, int is_sorted, int elem_idx, void userdata=NULL)

CvSeq *	cvSeqSlice (const CvSeq seq, CvSlice slice, CvMemStorage storage=NULL, int copy_data=0)

void	cvSeqSort (CvSeq seq, CvCmpFunc func, void userdata=NULL)

void	cvSet (CvArr arr, CvScalar value, const CvArr mask=NULL)
	Sets every element of an array to a given value. More...

void	cvSet1D (CvArr *arr, int idx0, CvScalar value)
	Change the particular array element. More...

void	cvSet2D (CvArr *arr, int idx0, int idx1, CvScalar value)

void	cvSet3D (CvArr *arr, int idx0, int idx1, int idx2, CvScalar value)

int	cvSetAdd (CvSet set_header, CvSetElem elem=NULL, CvSetElem **inserted_elem=NULL)

void	cvSetData (CvArr arr, void data, int step)
	Assigns user data to the array header. More...

int	cvSetErrMode (int mode)

void	cvSetErrStatus (int status)

void	cvSetIdentity (CvArr *mat, CvScalar value=cvRealScalar(1))

void	cvSetImageCOI (IplImage *image, int coi)
	Sets the channel of interest in an IplImage. More...

void	cvSetImageROI (IplImage *image, CvRect rect)
	Sets an image Region Of Interest (ROI) for a given rectangle. More...

void	cvSetIPLAllocators (Cv_iplCreateImageHeader create_header, Cv_iplAllocateImageData allocate_data, Cv_iplDeallocate deallocate, Cv_iplCreateROI create_roi, Cv_iplCloneImage clone_image)
	Makes OpenCV use IPL functions for allocating IplImage and IplROI structures. More...

void	cvSetND (CvArr arr, const int idx, CvScalar value)

CvSetElem *	cvSetNew (CvSet *set_header)

void	cvSetNumThreads (int threads=0)

void	cvSetReal1D (CvArr *arr, int idx0, double value)
	Change a specific array element. More...

void	cvSetReal2D (CvArr *arr, int idx0, int idx1, double value)

void	cvSetReal3D (CvArr *arr, int idx0, int idx1, int idx2, double value)

void	cvSetRealND (CvArr arr, const int idx, double value)

void	cvSetRemove (CvSet *set_header, int index)

void	cvSetRemoveByPtr (CvSet set_header, void elem)

void	cvSetSeqBlockSize (CvSeq *seq, int delta_elems)

void	cvSetSeqReaderPos (CvSeqReader *reader, int index, int is_relative=0)

void	cvSetZero (CvArr *arr)
	Clears the array. More...

CvSize	cvSize (int width, int height)

CvSize2D32f	cvSize2D32f (double width, double height)

CvSlice	cvSlice (int start, int end)

int	cvSliceLength (CvSlice slice, const CvSeq *seq)

int	cvSolve (const CvArr src1, const CvArr src2, CvArr *dst, int method=0)

int	cvSolveCubic (const CvMat coeffs, CvMat roots)

void	cvSolvePoly (const CvMat coeffs, CvMat roots2, int maxiter=20, int fig=100)

void	cvSort (const CvArr src, CvArr dst=NULL, CvArr *idxmat=NULL, int flags=0)

void	cvSplit (const CvArr src, CvArr dst0, CvArr dst1, CvArr dst2, CvArr *dst3)

void	cvStartAppendToSeq (CvSeq seq, CvSeqWriter writer)

void	cvStartNextStream (CvFileStorage *fs)
	Starts the next stream. More...

void	cvStartReadRawData (const CvFileStorage fs, const CvFileNode src, CvSeqReader *reader)
	Initializes the file node sequence reader. More...

void	cvStartReadSeq (const CvSeq seq, CvSeqReader reader, int reverse=0)

void	cvStartWriteSeq (int seq_flags, int header_size, int elem_size, CvMemStorage storage, CvSeqWriter writer)

void	cvStartWriteStruct (CvFileStorage fs, const char name, int struct_flags, const char *type_name=NULL, CvAttrList attributes=cvAttrList())
	Starts writing a new structure. More...

int	cvStdErrReport (int status, const char func_name, const char err_msg, const char file_name, int line, void userdata)

void	cvSub (const CvArr src1, const CvArr src2, CvArr dst, const CvArr mask=NULL)

void	cvSubRS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

void	cvSubS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

CvScalar	cvSum (const CvArr *arr)

void	cvSVBkSb (const CvArr W, const CvArr U, const CvArr V, const CvArr B, CvArr *X, int flags)

void	cvSVD (CvArr A, CvArr W, CvArr U=NULL, CvArr V=NULL, int flags=0)

CvTermCriteria	cvTermCriteria (int type, int max_iter, double epsilon)

CvScalar	cvTrace (const CvArr *mat)

void	cvTransform (const CvArr src, CvArr dst, const CvMat transmat, const CvMat shiftvec=NULL)

void	cvTranspose (const CvArr src, CvArr dst)

CvSeq *	cvTreeToNodeSeq (const void first, int header_size, CvMemStorage storage)

CvTypeInfo *	cvTypeOf (const void *struct_ptr)
	Returns the type of an object. More...

void	cvUnregisterType (const char *type_name)
	Unregisters the type. More...

int	cvUseOptimized (int on_off)

void	cvWrite (CvFileStorage fs, const char name, const void *ptr, CvAttrList attributes=cvAttrList())
	Writes an object to file storage. More...

void	cvWriteComment (CvFileStorage fs, const char comment, int eol_comment)
	Writes a comment. More...

void	cvWriteFileNode (CvFileStorage fs, const char new_node_name, const CvFileNode *node, int embed)
	Writes a file node to another file storage. More...

void	cvWriteInt (CvFileStorage fs, const char name, int value)
	Writes an integer value. More...

void	cvWriteRawData (CvFileStorage fs, const void src, int len, const char *dt)
	Writes multiple numbers. More...

void	cvWriteRawDataBase64 (CvFileStorage fs, const void src, int len, const char *dt)
	Writes multiple numbers in Base64. More...

void	cvWriteReal (CvFileStorage fs, const char name, double value)
	Writes a floating-point value. More...

void	cvWriteString (CvFileStorage fs, const char name, const char *str, int quote=0)
	Writes a text string. More...

void	cvXor (const CvArr src1, const CvArr src2, CvArr dst, const CvArr mask=NULL)

void	cvXorS (const CvArr src, CvScalar value, CvArr dst, const CvArr *mask=NULL)

Flags for cvCalcCovarMatrix
See also cvCalcCovarMatrix
#define	CV_COVAR_SCRAMBLED 0

#define	CV_COVAR_NORMAL 1

#define	CV_COVAR_USE_AVG 2

#define	CV_COVAR_SCALE 4

#define	CV_COVAR_ROWS 8

#define	CV_COVAR_COLS 16

Flags for cvNorm and cvNormalize

#define	CV_C 1

#define	CV_L1 2

#define	CV_L2 4

#define	CV_NORM_MASK 7

#define	CV_RELATIVE 8

#define	CV_DIFF 16

#define	CV_MINMAX 32

#define	CV_DIFF_C (CV_DIFF \| CV_C)

#define	CV_DIFF_L1 (CV_DIFF \| CV_L1)

#define	CV_DIFF_L2 (CV_DIFF \| CV_L2)

#define	CV_RELATIVE_C (CV_RELATIVE \| CV_C)

#define	CV_RELATIVE_L1 (CV_RELATIVE \| CV_L1)

#define	CV_RELATIVE_L2 (CV_RELATIVE \| CV_L2)

Flags for cvReduce

#define	CV_REDUCE_SUM 0

#define	CV_REDUCE_AVG 1

#define	CV_REDUCE_MAX 2

#define	CV_REDUCE_MIN 3

Flags for cvDFT, cvDCT and cvMulSpectrums

#define	CV_DXT_FORWARD 0

#define	CV_DXT_INVERSE 1

#define	CV_DXT_SCALE 2

#define	CV_DXT_INV_SCALE (CV_DXT_INVERSE + CV_DXT_SCALE)

#define	CV_DXT_INVERSE_SCALE CV_DXT_INV_SCALE

#define	CV_DXT_ROWS 4

#define	CV_DXT_MUL_CONJ 8

Graph
We represent a graph as a set of vertices. Vertices contain their adjacency lists (more exactly, pointers to first incoming or outcoming edge (or 0 if isolated vertex)). Edges are stored in another set. There is a singly-linked list of incoming/outcoming edges for each vertex. Each edge consists of: Two pointers to the starting and ending vertices (vtx[0] and vtx[1] respectively). A graph may be oriented or not. In the latter case, edges between vertex i to vertex j are not distinguished during search operations. Two pointers to next edges for the starting and ending vertices, where next[0] points to the next edge in the vtx[0] adjacency list and next[1] points to the next edge in the vtx[1] adjacency list. See also CvGraphEdge, CvGraphVtx, CvGraphVtx2D, CvGraph
#define	CV_GRAPH_EDGE_FIELDS()

#define	CV_GRAPH_VERTEX_FIELDS()

#define	CV_GRAPH_FIELDS()

#define	CV_TYPE_NAME_GRAPH "opencv-graph"

Detailed Description

Macro Definition Documentation

§ __CV_BEGIN__

#define __CV_BEGIN__ {

§ __CV_END__

#define __CV_END__ goto exit; exit: ; }

§ __CV_EXIT__

#define __CV_EXIT__ goto exit

§ CV_ARE_CNS_EQ

#define CV_ARE_CNS_EQ	(	mat1,
		mat2
	)	((((mat1)->type ^ (mat2)->type) & CV_MAT_CN_MASK) == 0)

§ CV_ARE_DEPTHS_EQ

#define CV_ARE_DEPTHS_EQ	(	mat1,
		mat2
	)	((((mat1)->type ^ (mat2)->type) & CV_MAT_DEPTH_MASK) == 0)

§ CV_ARE_SIZES_EQ

#define CV_ARE_SIZES_EQ	(	mat1,
		mat2
	)	((mat1)->rows == (mat2)->rows && (mat1)->cols == (mat2)->cols)

§ CV_ARE_TYPES_EQ

#define CV_ARE_TYPES_EQ	(	mat1,
		mat2
	)	((((mat1)->type ^ (mat2)->type) & CV_MAT_TYPE_MASK) == 0)

§ CV_ASSERT

#define CV_ASSERT ( Condition )

Value:

{                                                                       \
    if( !(Condition) )                                                  \
        CV_ERROR( CV_StsInternal, "Assertion: " #Condition " failed" ); \
}

Runtime assertion macro

§ CV_AUTO_STEP

#define CV_AUTO_STEP 0x7fffffff

§ CV_AUTOSTEP

#define CV_AUTOSTEP 0x7fffffff

§ CV_BACK

#define CV_BACK 0

§ CV_C

#define CV_C 1

§ CV_CALL

#define CV_CALL ( Func )

Value:

{                                                                   \
    Func;                                                           \
    CV_CHECK();                                                     \
}

CV_CALL macro calls CV (or IPL) function, checks error status and signals a error if the function failed. Useful in "parent node" error procesing mode

§ CV_CHECK

#define CV_CHECK ( )

Value:

{                                                                   \
    if( cvGetErrStatus() < 0 )                                      \
        CV_ERROR( CV_StsBackTrace, "Inner function failed." );      \
}

CV_CHECK macro checks error status after CV (or IPL) function call. If error detected, control will be transferred to the exit label.

§ CV_CHECK_QUIET

#define CV_CHECK_QUIET 2

§ CV_CHECK_RANGE

#define CV_CHECK_RANGE 1

§ CV_CHOLESKY

#define CV_CHOLESKY 3

§ CV_CMP

#define CV_CMP	(	a,
		b
	)	(((a) > (b)) - ((a) < (b)))

§ CV_CMP_EQ

#define CV_CMP_EQ 0

§ CV_CMP_GE

#define CV_CMP_GE 2

§ CV_CMP_GT

#define CV_CMP_GT 1

§ CV_CMP_LE

#define CV_CMP_LE 4

§ CV_CMP_LT

#define CV_CMP_LT 3

§ CV_CMP_NE

#define CV_CMP_NE 5

§ CV_CONTOUR_FIELDS

#define CV_CONTOUR_FIELDS ( )

Value:

CV_SEQUENCE_FIELDS()     \
    CvRect rect;             \
    int color;               \
    int reserved[3];

§ CV_COVAR_COLS

#define CV_COVAR_COLS 16

flag for cvCalcCovarMatrix, all the input vectors are stored in a single matrix, as its columns

§ CV_COVAR_NORMAL

#define CV_COVAR_NORMAL 1

flag for cvCalcCovarMatrix, [v1-avg, v2-avg,...] * transpose([v1-avg,v2-avg,...])

§ CV_COVAR_ROWS

#define CV_COVAR_ROWS 8

flag for cvCalcCovarMatrix, all the input vectors are stored in a single matrix, as its rows

§ CV_COVAR_SCALE

#define CV_COVAR_SCALE 4

flag for cvCalcCovarMatrix, scale the covariance matrix coefficients by number of the vectors

§ CV_COVAR_SCRAMBLED

#define CV_COVAR_SCRAMBLED 0

flag for cvCalcCovarMatrix, transpose([v1-avg, v2-avg,...]) * [v1-avg,v2-avg,...]

§ CV_COVAR_USE_AVG

#define CV_COVAR_USE_AVG 2

flag for cvCalcCovarMatrix, do not calc average (i.e. mean vector) - use the input vector instead (useful for calculating covariance matrix by parts)

§ CV_CURRENT_POINT

#define CV_CURRENT_POINT ( reader ) (*((CvPoint*)((reader).ptr)))

§ CV_DIFF

#define CV_DIFF 16

§ CV_DIFF_C

#define CV_DIFF_C (CV_DIFF | CV_C)

§ CV_DIFF_L1

#define CV_DIFF_L1 (CV_DIFF | CV_L1)

§ CV_DIFF_L2

#define CV_DIFF_L2 (CV_DIFF | CV_L2)

§ CV_DXT_FORWARD

#define CV_DXT_FORWARD 0

§ CV_DXT_INV_SCALE

#define CV_DXT_INV_SCALE (CV_DXT_INVERSE + CV_DXT_SCALE)

§ CV_DXT_INVERSE

#define CV_DXT_INVERSE 1

§ CV_DXT_INVERSE_SCALE

#define CV_DXT_INVERSE_SCALE CV_DXT_INV_SCALE

§ CV_DXT_MUL_CONJ

#define CV_DXT_MUL_CONJ 8

conjugate the second argument of cvMulSpectrums

§ CV_DXT_ROWS

#define CV_DXT_ROWS 4

transform each row individually

§ CV_DXT_SCALE

#define CV_DXT_SCALE 2

divide result by size of array

§ CV_ErrModeLeaf

#define CV_ErrModeLeaf 0 /* Print error and exit program */

§ CV_ErrModeParent

#define CV_ErrModeParent 1 /* Print error and continue */

§ CV_ErrModeSilent

#define CV_ErrModeSilent 2 /* Don't print and continue */

§ CV_ERROR

#define CV_ERROR	(	Code,
		Msg
	)

Value:

{                                                                   \
    cvError( (Code), cvFuncName, Msg, __FILE__, __LINE__ );        \
    __CV_EXIT__;                                                   \
}

CV_ERROR macro unconditionally raises error with passed code and message. After raising error, control will be transferred to the exit label.

§ CV_FRONT

#define CV_FRONT 1

§ CV_FUNCNAME

#define CV_FUNCNAME ( Name ) static char cvFuncName[] = Name

CV_FUNCNAME macro defines icvFuncName constant which is used by CV_ERROR macro

§ CV_GEMM_A_T

#define CV_GEMM_A_T 1

§ CV_GEMM_B_T

#define CV_GEMM_B_T 2

§ CV_GEMM_C_T

#define CV_GEMM_C_T 4

§ CV_GET_SEQ_ELEM

#define CV_GET_SEQ_ELEM	(	elem_type,
		seq,
		index
	)	CV_SEQ_ELEM( (seq), elem_type, (index) )

§ CV_GRAPH

#define CV_GRAPH CV_SEQ_KIND_GRAPH

§ CV_GRAPH_ALL_ITEMS

#define CV_GRAPH_ALL_ITEMS -1

§ CV_GRAPH_ANY_EDGE

#define CV_GRAPH_ANY_EDGE 30

§ CV_GRAPH_BACK_EDGE

#define CV_GRAPH_BACK_EDGE 4

§ CV_GRAPH_BACKTRACKING

#define CV_GRAPH_BACKTRACKING 64

§ CV_GRAPH_CROSS_EDGE

#define CV_GRAPH_CROSS_EDGE 16

§ CV_GRAPH_EDGE_FIELDS

#define CV_GRAPH_EDGE_FIELDS ( )

Value:

int flags;                      \
    float weight;                   \
    struct CvGraphEdge* next[2];    \
    struct CvGraphVtx* vtx[2];

§ CV_GRAPH_FIELDS

#define CV_GRAPH_FIELDS ( )

Value:

CV_SET_FIELDS() \

CvSet* edges;

CV_SET_FIELDS

#define CV_SET_FIELDS()

Definition: types_c.h:1290

Graph is "derived" from the set (this is set a of vertices) and includes another set (edges)

§ CV_GRAPH_FLAG_ORIENTED

#define CV_GRAPH_FLAG_ORIENTED (1 << CV_SEQ_FLAG_SHIFT)

flags for graphs

§ CV_GRAPH_FORWARD_EDGE

#define CV_GRAPH_FORWARD_EDGE 8

§ CV_GRAPH_FORWARD_EDGE_FLAG

#define CV_GRAPH_FORWARD_EDGE_FLAG (1 << 28)

§ CV_GRAPH_ITEM_VISITED_FLAG

#define CV_GRAPH_ITEM_VISITED_FLAG (1 << 30)

flags for graph vertices and edges

§ CV_GRAPH_NEW_TREE

#define CV_GRAPH_NEW_TREE 32

§ CV_GRAPH_OVER

#define CV_GRAPH_OVER -1

§ CV_GRAPH_SEARCH_TREE_NODE_FLAG

#define CV_GRAPH_SEARCH_TREE_NODE_FLAG (1 << 29)

§ CV_GRAPH_TREE_EDGE

#define CV_GRAPH_TREE_EDGE 2

§ CV_GRAPH_VERTEX

#define CV_GRAPH_VERTEX 1

§ CV_GRAPH_VERTEX_FIELDS

#define CV_GRAPH_VERTEX_FIELDS ( )

Value:

int flags; \

struct CvGraphEdge* first;

CvGraphEdge

Definition: types_c.h:1342

§ CV_HIST_ARRAY

#define CV_HIST_ARRAY 0

§ CV_HIST_HAS_RANGES

#define CV_HIST_HAS_RANGES ( hist ) (((hist)->type & CV_HIST_RANGES_FLAG) != 0)

§ CV_HIST_MAGIC_VAL

#define CV_HIST_MAGIC_VAL 0x42450000

§ CV_HIST_RANGES_FLAG

#define CV_HIST_RANGES_FLAG (1 << 11)

indicates whether bin ranges are set already or not

§ CV_HIST_SPARSE

#define CV_HIST_SPARSE 1

§ CV_HIST_TREE

#define CV_HIST_TREE CV_HIST_SPARSE

§ CV_HIST_UNIFORM

#define CV_HIST_UNIFORM 1

should be used as a parameter only, it turns to CV_HIST_UNIFORM_FLAG of hist->type

§ CV_HIST_UNIFORM_FLAG

#define CV_HIST_UNIFORM_FLAG (1 << 10)

§ CV_IABS

#define CV_IABS ( a ) abs(a)

absolute value without jumps

§ CV_IMAGE_ELEM

#define CV_IMAGE_ELEM	(	image,
		elemtype,
		row,
		col
	)	(((elemtype)((image)->imageData + (image)->widthStep(row)))[(col)])

get reference to pixel at (col,row), for multi-channel images (col) should be multiplied by number of channels

§ CV_IMAX

#define CV_IMAX	(	a,
		b
	)	((a) ^ (((a)^(b)) & (((a) > (b)) - 1)))

§ CV_IMIN

#define CV_IMIN	(	a,
		b
	)	((a) ^ (((a)^(b)) & (((a) < (b)) - 1)))

min & max without jumps

§ CV_IS_GRAPH

#define CV_IS_GRAPH ( seq ) (CV_IS_SET(seq) && CV_SEQ_KIND((CvSet*)(seq)) == CV_SEQ_KIND_GRAPH)

§ CV_IS_GRAPH_EDGE_VISITED

#define CV_IS_GRAPH_EDGE_VISITED ( edge ) (((CvGraphEdge*)(edge))->flags & CV_GRAPH_ITEM_VISITED_FLAG)

§ CV_IS_GRAPH_ORIENTED

#define CV_IS_GRAPH_ORIENTED ( seq ) (((seq)->flags & CV_GRAPH_FLAG_ORIENTED) != 0)

§ CV_IS_GRAPH_VERTEX_VISITED

#define CV_IS_GRAPH_VERTEX_VISITED ( vtx ) (((CvGraphVtx*)(vtx))->flags & CV_GRAPH_ITEM_VISITED_FLAG)

§ CV_IS_HIST

#define CV_IS_HIST ( hist )

Value:

((hist) != NULL  && \
     (((CvHistogram*)(hist))->type & CV_MAGIC_MASK) == CV_HIST_MAGIC_VAL && \
     (hist)->bins != NULL)

§ CV_IS_IMAGE

#define CV_IS_IMAGE ( img ) (CV_IS_IMAGE_HDR(img) && ((IplImage*)img)->imageData != NULL)

§ CV_IS_IMAGE_HDR

#define CV_IS_IMAGE_HDR ( img ) ((img) != NULL && ((const IplImage*)(img))->nSize == sizeof(IplImage))

§ CV_IS_MASK_ARR

#define CV_IS_MASK_ARR ( mat ) (((mat)->type & (CV_MAT_TYPE_MASK & ~CV_8SC1)) == 0)

§ CV_IS_MAT

#define CV_IS_MAT ( mat ) (CV_IS_MAT_HDR(mat) && ((const CvMat*)(mat))->data.ptr != NULL)

§ CV_IS_MAT_CONST

#define CV_IS_MAT_CONST ( mat ) (((mat)->rows|(mat)->cols) == 1)

§ CV_IS_MAT_HDR

#define CV_IS_MAT_HDR ( mat )

Value:

((mat) != NULL && \
    (((const CvMat*)(mat))->type & CV_MAGIC_MASK) == CV_MAT_MAGIC_VAL && \
    ((const CvMat*)(mat))->cols > 0 && ((const CvMat*)(mat))->rows > 0)

§ CV_IS_MAT_HDR_Z

#define CV_IS_MAT_HDR_Z ( mat )

Value:

((mat) != NULL && \
    (((const CvMat*)(mat))->type & CV_MAGIC_MASK) == CV_MAT_MAGIC_VAL && \
    ((const CvMat*)(mat))->cols >= 0 && ((const CvMat*)(mat))->rows >= 0)

§ CV_IS_MATND

#define CV_IS_MATND ( mat ) (CV_IS_MATND_HDR(mat) && ((const CvMatND*)(mat))->data.ptr != NULL)

§ CV_IS_MATND_HDR

#define CV_IS_MATND_HDR ( mat ) ((mat) != NULL && (((const CvMatND*)(mat))->type & CV_MAGIC_MASK) == CV_MATND_MAGIC_VAL)

§ CV_IS_SEQ

#define CV_IS_SEQ ( seq ) ((seq) != NULL && (((CvSeq*)(seq))->flags & CV_MAGIC_MASK) == CV_SEQ_MAGIC_VAL)

§ CV_IS_SEQ_CHAIN

#define CV_IS_SEQ_CHAIN ( seq ) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE && (seq)->elem_size == 1)

§ CV_IS_SEQ_CHAIN_CONTOUR

#define CV_IS_SEQ_CHAIN_CONTOUR ( seq ) (CV_IS_SEQ_CHAIN( seq ) && CV_IS_SEQ_CLOSED( seq ))

§ CV_IS_SEQ_CLOSED

#define CV_IS_SEQ_CLOSED ( seq ) (((seq)->flags & CV_SEQ_FLAG_CLOSED) != 0)

§ CV_IS_SEQ_CONTOUR

#define CV_IS_SEQ_CONTOUR ( seq ) (CV_IS_SEQ_CLOSED(seq) && (CV_IS_SEQ_POLYLINE(seq) || CV_IS_SEQ_CHAIN(seq)))

§ CV_IS_SEQ_CONVEX

#define CV_IS_SEQ_CONVEX ( seq ) 0

§ CV_IS_SEQ_CURVE

#define CV_IS_SEQ_CURVE ( seq ) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE)

§ CV_IS_SEQ_HOLE

#define CV_IS_SEQ_HOLE ( seq ) (((seq)->flags & CV_SEQ_FLAG_HOLE) != 0)

§ CV_IS_SEQ_INDEX

#define CV_IS_SEQ_INDEX ( seq )

Value:

((CV_SEQ_ELTYPE(seq) == CV_SEQ_ELTYPE_INDEX) && \

(CV_SEQ_KIND(seq) == CV_SEQ_KIND_GENERIC))

CV_SEQ_KIND_GENERIC

#define CV_SEQ_KIND_GENERIC

Definition: types_c.h:1434

CV_SEQ_KIND

#define CV_SEQ_KIND(seq)

Definition: types_c.h:1478

CV_SEQ_ELTYPE

#define CV_SEQ_ELTYPE(seq)

Definition: types_c.h:1477

CV_SEQ_ELTYPE_INDEX

#define CV_SEQ_ELTYPE_INDEX

Definition: types_c.h:1423

flag checking

§ CV_IS_SEQ_POINT_SET

#define CV_IS_SEQ_POINT_SET ( seq ) ((CV_SEQ_ELTYPE(seq) == CV_32SC2 || CV_SEQ_ELTYPE(seq) == CV_32FC2))

type checking macros

§ CV_IS_SEQ_POINT_SUBSET

#define CV_IS_SEQ_POINT_SUBSET ( seq ) (CV_IS_SEQ_INDEX( seq ) || CV_SEQ_ELTYPE(seq) == CV_SEQ_ELTYPE_PPOINT)

§ CV_IS_SEQ_POLYGON

#define CV_IS_SEQ_POLYGON ( seq ) (CV_IS_SEQ_POLYLINE(seq) && CV_IS_SEQ_CLOSED(seq))

§ CV_IS_SEQ_POLYGON_TREE

#define CV_IS_SEQ_POLYGON_TREE ( seq )

Value:

(CV_SEQ_ELTYPE (seq) == CV_SEQ_ELTYPE_TRIAN_ATR && \

CV_SEQ_KIND( seq ) == CV_SEQ_KIND_BIN_TREE )

CV_SEQ_ELTYPE_TRIAN_ATR

#define CV_SEQ_ELTYPE_TRIAN_ATR

Definition: types_c.h:1426

CV_SEQ_KIND_BIN_TREE

#define CV_SEQ_KIND_BIN_TREE

Definition: types_c.h:1436

CV_SEQ_ELTYPE

#define CV_SEQ_ELTYPE(seq)

Definition: types_c.h:1477

§ CV_IS_SEQ_POLYLINE

#define CV_IS_SEQ_POLYLINE ( seq ) (CV_SEQ_KIND(seq) == CV_SEQ_KIND_CURVE && CV_IS_SEQ_POINT_SET(seq))

§ CV_IS_SEQ_SIMPLE

#define CV_IS_SEQ_SIMPLE ( seq ) 1

§ CV_IS_SET

#define CV_IS_SET ( set ) ((set) != NULL && (((CvSeq*)(set))->flags & CV_MAGIC_MASK) == CV_SET_MAGIC_VAL)

§ CV_IS_SET_ELEM

#define CV_IS_SET_ELEM ( ptr ) (((CvSetElem*)(ptr))->flags >= 0)

Checks whether the element pointed by ptr belongs to a set or not

§ CV_IS_SPARSE_HIST

#define CV_IS_SPARSE_HIST ( hist ) CV_IS_SPARSE_MAT((hist)->bins)

§ CV_IS_SPARSE_MAT

#define CV_IS_SPARSE_MAT ( mat ) CV_IS_SPARSE_MAT_HDR(mat)

§ CV_IS_SPARSE_MAT_HDR

#define CV_IS_SPARSE_MAT_HDR ( mat )

Value:

((mat) != NULL && \

(((const CvSparseMat*)(mat))->type & CV_MAGIC_MASK) == CV_SPARSE_MAT_MAGIC_VAL)

CvSparseMat

Definition: types_c.h:673

CV_SPARSE_MAT_MAGIC_VAL

#define CV_SPARSE_MAT_MAGIC_VAL

Definition: types_c.h:668

CV_MAGIC_MASK

#define CV_MAGIC_MASK

Definition: types_c.h:408

§ CV_IS_STORAGE

#define CV_IS_STORAGE ( storage )

Value:

((storage) != NULL && \

(((CvMemStorage*)(storage))->signature & CV_MAGIC_MASK) == CV_STORAGE_MAGIC_VAL)

CV_MAGIC_MASK

#define CV_MAGIC_MASK

Definition: types_c.h:408

CvMemStorage

Definition: types_c.h:1189

CV_STORAGE_MAGIC_VAL

#define CV_STORAGE_MAGIC_VAL

Definition: types_c.h:1187

§ CV_IS_SUBDIV2D

#define CV_IS_SUBDIV2D ( seq ) (CV_IS_SET(seq) && CV_SEQ_KIND((CvSet*)(seq)) == CV_SEQ_KIND_SUBDIV2D)

§ CV_IS_UNIFORM_HIST

#define CV_IS_UNIFORM_HIST ( hist ) (((hist)->type & CV_HIST_UNIFORM_FLAG) != 0)

§ CV_KMEANS_USE_INITIAL_LABELS

#define CV_KMEANS_USE_INITIAL_LABELS 1

The function implements the K-means algorithm for clustering an array of sample vectors in a specified number of classes

§ CV_L1

#define CV_L1 2

§ CV_L2

#define CV_L2 4

§ CV_LU

#define CV_LU 0

§ CV_MAGIC_MASK

#define CV_MAGIC_MASK 0xFFFF0000

§ CV_MAT_ELEM

#define CV_MAT_ELEM	(	mat,
		elemtype,
		row,
		col
	)	((elemtype)CV_MAT_ELEM_PTR_FAST( mat, row, col, sizeof(elemtype)))

§ CV_MAT_ELEM_PTR

#define CV_MAT_ELEM_PTR	(	mat,
		row,
		col
	)	CV_MAT_ELEM_PTR_FAST( mat, row, col, CV_ELEM_SIZE((mat).type) )

§ CV_MAT_ELEM_PTR_FAST

#define CV_MAT_ELEM_PTR_FAST	(	mat,
		row,
		col,
		pix_size
	)

Value:

(assert( (unsigned)(row) < (unsigned)(mat).rows &&   \
             (unsigned)(col) < (unsigned)(mat).cols ),   \
     (mat).data.ptr + (size_t)(mat).step*(row) + (pix_size)*(col))

§ CV_MAT_MAGIC_VAL

#define CV_MAT_MAGIC_VAL 0x42420000

§ CV_MATND_MAGIC_VAL

#define CV_MATND_MAGIC_VAL 0x42430000

§ CV_MAX_ARR

#define CV_MAX_ARR 10

§ CV_MAX_DIM

#define CV_MAX_DIM 32

§ CV_MAX_DIM_HEAP

#define CV_MAX_DIM_HEAP 1024

§ CV_MINMAX

#define CV_MINMAX 32

§ CV_NEXT_GRAPH_EDGE

#define CV_NEXT_GRAPH_EDGE	(	edge,
		vertex
	)

Value:

(assert((edge)->vtx[0] == (vertex) || (edge)->vtx[1] == (vertex)), \

(edge)->next[(edge)->vtx[1] == (vertex)])

Return next graph edge for given vertex:

§ CV_NEXT_SEQ_ELEM

#define CV_NEXT_SEQ_ELEM	(	elem_size,
		reader
	)

Value:

{                                                             \
    if( ((reader).ptr += (elem_size)) >= (reader).block_max ) \
    {                                                         \
        cvChangeSeqBlock( &(reader), 1 );                     \
    }                                                         \
}

Move reader position forward:

§ CV_NO_CN_CHECK

#define CV_NO_CN_CHECK 2

§ CV_NO_DEPTH_CHECK

#define CV_NO_DEPTH_CHECK 1

§ CV_NO_SIZE_CHECK

#define CV_NO_SIZE_CHECK 4

§ CV_NODE_EMPTY

#define CV_NODE_EMPTY 32

§ CV_NODE_FLOAT

#define CV_NODE_FLOAT CV_NODE_REAL

§ CV_NODE_FLOW

#define CV_NODE_FLOW 8

file node flags Used only for writing structures in YAML format.

§ CV_NODE_HAS_NAME

#define CV_NODE_HAS_NAME ( flags ) (((flags) & CV_NODE_NAMED) != 0)

§ CV_NODE_IDX

#define CV_NODE_IDX	(	mat,
		node
	)	((int)((uchar)(node) + (mat)->idxoffset))

§ CV_NODE_INT

#define CV_NODE_INT 1

§ CV_NODE_INTEGER

#define CV_NODE_INTEGER CV_NODE_INT

§ CV_NODE_IS_COLLECTION

#define CV_NODE_IS_COLLECTION ( flags ) (CV_NODE_TYPE(flags) >= CV_NODE_SEQ)

§ CV_NODE_IS_EMPTY

#define CV_NODE_IS_EMPTY ( flags ) (((flags) & CV_NODE_EMPTY) != 0)

§ CV_NODE_IS_FLOW

#define CV_NODE_IS_FLOW ( flags ) (((flags) & CV_NODE_FLOW) != 0)

§ CV_NODE_IS_INT

#define CV_NODE_IS_INT ( flags ) (CV_NODE_TYPE(flags) == CV_NODE_INT)

§ CV_NODE_IS_MAP

#define CV_NODE_IS_MAP ( flags ) (CV_NODE_TYPE(flags) == CV_NODE_MAP)

§ CV_NODE_IS_REAL

#define CV_NODE_IS_REAL ( flags ) (CV_NODE_TYPE(flags) == CV_NODE_REAL)

§ CV_NODE_IS_SEQ

#define CV_NODE_IS_SEQ ( flags ) (CV_NODE_TYPE(flags) == CV_NODE_SEQ)

§ CV_NODE_IS_STRING

#define CV_NODE_IS_STRING ( flags ) (CV_NODE_TYPE(flags) == CV_NODE_STRING)

§ CV_NODE_IS_USER

#define CV_NODE_IS_USER ( flags ) (((flags) & CV_NODE_USER) != 0)

§ CV_NODE_MAP

#define CV_NODE_MAP 6

§ CV_NODE_NAMED

#define CV_NODE_NAMED 64

§ CV_NODE_NONE

#define CV_NODE_NONE 0

§ CV_NODE_REAL

#define CV_NODE_REAL 2

§ CV_NODE_REF

#define CV_NODE_REF 4

not used

§ CV_NODE_SEQ

#define CV_NODE_SEQ 5

§ CV_NODE_SEQ_IS_SIMPLE

#define CV_NODE_SEQ_IS_SIMPLE ( seq ) (((seq)->flags & CV_NODE_SEQ_SIMPLE) != 0)

§ CV_NODE_SEQ_SIMPLE

#define CV_NODE_SEQ_SIMPLE 256

§ CV_NODE_STR

#define CV_NODE_STR 3

§ CV_NODE_STRING

#define CV_NODE_STRING CV_NODE_STR

§ CV_NODE_TYPE

#define CV_NODE_TYPE ( flags ) ((flags) & CV_NODE_TYPE_MASK)

§ CV_NODE_TYPE_MASK

#define CV_NODE_TYPE_MASK 7

§ CV_NODE_USER

#define CV_NODE_USER 16

§ CV_NODE_VAL

#define CV_NODE_VAL	(	mat,
		node
	)	((void)((uchar)(node) + (mat)->valoffset))

§ CV_NORM_MASK

#define CV_NORM_MASK 7

§ CV_NORMAL

#define CV_NORMAL 16

§ CV_ORIENTED_GRAPH

#define CV_ORIENTED_GRAPH (CV_SEQ_KIND_GRAPH|CV_GRAPH_FLAG_ORIENTED)

§ CV_PCA_DATA_AS_COL

#define CV_PCA_DATA_AS_COL 1

§ CV_PCA_DATA_AS_ROW

#define CV_PCA_DATA_AS_ROW 0

§ CV_PCA_USE_AVG

#define CV_PCA_USE_AVG 2

§ CV_PREV_POINT

#define CV_PREV_POINT ( reader ) (*((CvPoint*)((reader).prev_elem)))

§ CV_PREV_SEQ_ELEM

#define CV_PREV_SEQ_ELEM	(	elem_size,
		reader
	)

Value:

{                                                            \
    if( ((reader).ptr -= (elem_size)) < (reader).block_min ) \
    {                                                        \
        cvChangeSeqBlock( &(reader), -1 );                   \
    }                                                        \
}

Move reader position backward:

§ CV_QR

#define CV_QR 4

§ CV_RAND_NORMAL

#define CV_RAND_NORMAL 1

§ CV_RAND_UNI

#define CV_RAND_UNI 0

§ CV_READ_CHAIN_POINT

#define CV_READ_CHAIN_POINT	(	_pt,
		reader
	)

Value:

{                                                                       \
    (_pt) = (reader).pt;                                                \
    if( (reader).ptr )                                                  \
    {                                                                   \
        CV_READ_SEQ_ELEM( (reader).code, (reader));                     \
        assert( ((reader).code & ~7) == 0 );                            \
        (reader).pt.x += (reader).deltas[(int)(reader).code][0];        \
        (reader).pt.y += (reader).deltas[(int)(reader).code][1];        \
    }                                                                   \
}

§ CV_READ_EDGE

#define CV_READ_EDGE	(	pt1,
		pt2,
		reader
	)

Value:

{                                                      \
    assert( sizeof(pt1) == sizeof(CvPoint) &&          \
            sizeof(pt2) == sizeof(CvPoint) &&          \
            reader.seq->elem_size == sizeof(CvPoint)); \
    (pt1) = CV_PREV_POINT( reader );                   \
    (pt2) = CV_CURRENT_POINT( reader );                \
    (reader).prev_elem = (reader).ptr;                 \
    CV_NEXT_SEQ_ELEM( sizeof(CvPoint), (reader));      \
}

§ CV_READ_SEQ_ELEM

#define CV_READ_SEQ_ELEM	(	elem,
		reader
	)

Value:

{                                                              \
    assert( (reader).seq->elem_size == sizeof(elem));          \
    memcpy( &(elem), (reader).ptr, sizeof((elem)));            \
    CV_NEXT_SEQ_ELEM( sizeof(elem), reader )                   \
}

Read element and move read position forward:

§ CV_REDUCE_AVG

#define CV_REDUCE_AVG 1

§ CV_REDUCE_MAX

#define CV_REDUCE_MAX 2

§ CV_REDUCE_MIN

#define CV_REDUCE_MIN 3

§ CV_REDUCE_SUM

#define CV_REDUCE_SUM 0

§ CV_RELATIVE

#define CV_RELATIVE 8

§ CV_RELATIVE_C

#define CV_RELATIVE_C (CV_RELATIVE | CV_C)

§ CV_RELATIVE_L1

#define CV_RELATIVE_L1 (CV_RELATIVE | CV_L1)

§ CV_RELATIVE_L2

#define CV_RELATIVE_L2 (CV_RELATIVE | CV_L2)

§ CV_REV_READ_SEQ_ELEM

#define CV_REV_READ_SEQ_ELEM	(	elem,
		reader
	)

Value:

{                                                                \
    assert( (reader).seq->elem_size == sizeof(elem));            \
    memcpy(&(elem), (reader).ptr, sizeof((elem)));               \
    CV_PREV_SEQ_ELEM( sizeof(elem), reader )                     \
}

Read element and move read position backward:

§ CV_RNG_COEFF

#define CV_RNG_COEFF 4164903690U

§ CV_SEQ_CHAIN

#define CV_SEQ_CHAIN (CV_SEQ_KIND_CURVE | CV_SEQ_ELTYPE_CODE)

chain-coded curves

§ CV_SEQ_CHAIN_CONTOUR

#define CV_SEQ_CHAIN_CONTOUR (CV_SEQ_FLAG_CLOSED | CV_SEQ_CHAIN)

§ CV_SEQ_CONNECTED_COMP

#define CV_SEQ_CONNECTED_COMP (CV_SEQ_KIND_GENERIC | CV_SEQ_ELTYPE_CONNECTED_COMP)

sequence of the connected components

§ CV_SEQ_CONTOUR

#define CV_SEQ_CONTOUR CV_SEQ_POLYGON

§ CV_SEQ_ELEM

#define CV_SEQ_ELEM	(	seq,
		elem_type,
		index
	)

Value:

  \
(   assert(sizeof((seq)->first[0]) == sizeof(CvSeqBlock) &&      \
    (seq)->elem_size == sizeof(elem_type)),                      \
    (elem_type*)((seq)->first && (unsigned)index <               \
    (unsigned)((seq)->first->count) ?                            \
    (seq)->first->data + (index) * sizeof(elem_type) :           \
    cvGetSeqElem( (CvSeq*)(seq), (index) )))

§ CV_SEQ_ELTYPE

#define CV_SEQ_ELTYPE ( seq ) ((seq)->flags & CV_SEQ_ELTYPE_MASK)

§ CV_SEQ_ELTYPE_BITS

#define CV_SEQ_ELTYPE_BITS 12

§ CV_SEQ_ELTYPE_CODE

#define CV_SEQ_ELTYPE_CODE CV_8UC1

freeman code: 0..7

§ CV_SEQ_ELTYPE_CONNECTED_COMP

#define CV_SEQ_ELTYPE_CONNECTED_COMP 0

connected component

§ CV_SEQ_ELTYPE_GENERIC

#define CV_SEQ_ELTYPE_GENERIC 0

§ CV_SEQ_ELTYPE_GRAPH_EDGE

#define CV_SEQ_ELTYPE_GRAPH_EDGE 0

&next_o, &next_d, &vtx_o, &vtx_d

§ CV_SEQ_ELTYPE_GRAPH_VERTEX

#define CV_SEQ_ELTYPE_GRAPH_VERTEX 0

first_edge, &(x,y)

§ CV_SEQ_ELTYPE_INDEX

#define CV_SEQ_ELTYPE_INDEX CV_32SC1

#(x,y)

§ CV_SEQ_ELTYPE_MASK

#define CV_SEQ_ELTYPE_MASK ((1 << CV_SEQ_ELTYPE_BITS) - 1)

§ CV_SEQ_ELTYPE_POINT

#define CV_SEQ_ELTYPE_POINT CV_32SC2

(x,y)

§ CV_SEQ_ELTYPE_POINT3D

#define CV_SEQ_ELTYPE_POINT3D CV_32FC3

(x,y,z)

§ CV_SEQ_ELTYPE_PPOINT

#define CV_SEQ_ELTYPE_PPOINT CV_SEQ_ELTYPE_PTR

&(x,y)

§ CV_SEQ_ELTYPE_PTR

#define CV_SEQ_ELTYPE_PTR CV_USRTYPE1

§ CV_SEQ_ELTYPE_TRIAN_ATR

#define CV_SEQ_ELTYPE_TRIAN_ATR 0

vertex of the binary tree

§ CV_SEQ_FLAG_CLOSED

#define CV_SEQ_FLAG_CLOSED (1 << CV_SEQ_FLAG_SHIFT)

flags for curves

§ CV_SEQ_FLAG_CONVEX

#define CV_SEQ_FLAG_CONVEX (0 << CV_SEQ_FLAG_SHIFT)

§ CV_SEQ_FLAG_HOLE

#define CV_SEQ_FLAG_HOLE (2 << CV_SEQ_FLAG_SHIFT)

§ CV_SEQ_FLAG_SHIFT

#define CV_SEQ_FLAG_SHIFT (CV_SEQ_KIND_BITS + CV_SEQ_ELTYPE_BITS)

§ CV_SEQ_FLAG_SIMPLE

#define CV_SEQ_FLAG_SIMPLE (0 << CV_SEQ_FLAG_SHIFT)

§ CV_SEQ_INDEX

#define CV_SEQ_INDEX (CV_SEQ_KIND_GENERIC | CV_SEQ_ELTYPE_INDEX)

sequence of the integer numbers

§ CV_SEQ_KIND

#define CV_SEQ_KIND ( seq ) ((seq)->flags & CV_SEQ_KIND_MASK )

§ CV_SEQ_KIND_BIN_TREE

#define CV_SEQ_KIND_BIN_TREE (2 << CV_SEQ_ELTYPE_BITS)

§ CV_SEQ_KIND_BITS

#define CV_SEQ_KIND_BITS 2

§ CV_SEQ_KIND_CURVE

#define CV_SEQ_KIND_CURVE (1 << CV_SEQ_ELTYPE_BITS)

§ CV_SEQ_KIND_GENERIC

#define CV_SEQ_KIND_GENERIC (0 << CV_SEQ_ELTYPE_BITS)

types of sequences

§ CV_SEQ_KIND_GRAPH

#define CV_SEQ_KIND_GRAPH (1 << CV_SEQ_ELTYPE_BITS)

types of sparse sequences (sets)

§ CV_SEQ_KIND_MASK

#define CV_SEQ_KIND_MASK (((1 << CV_SEQ_KIND_BITS) - 1)<<CV_SEQ_ELTYPE_BITS)

§ CV_SEQ_KIND_SUBDIV2D

#define CV_SEQ_KIND_SUBDIV2D (2 << CV_SEQ_ELTYPE_BITS)

§ CV_SEQ_MAGIC_VAL

#define CV_SEQ_MAGIC_VAL 0x42990000

§ CV_SEQ_POINT3D_SET

#define CV_SEQ_POINT3D_SET (CV_SEQ_KIND_GENERIC| CV_SEQ_ELTYPE_POINT3D)

§ CV_SEQ_POINT_SET

#define CV_SEQ_POINT_SET (CV_SEQ_KIND_GENERIC| CV_SEQ_ELTYPE_POINT)

point sets

§ CV_SEQ_POLYGON

#define CV_SEQ_POLYGON (CV_SEQ_FLAG_CLOSED | CV_SEQ_POLYLINE )

§ CV_SEQ_POLYGON_TREE

#define CV_SEQ_POLYGON_TREE (CV_SEQ_KIND_BIN_TREE | CV_SEQ_ELTYPE_TRIAN_ATR)

binary tree for the contour

§ CV_SEQ_POLYLINE

#define CV_SEQ_POLYLINE (CV_SEQ_KIND_CURVE | CV_SEQ_ELTYPE_POINT)

§ CV_SEQ_READER_FIELDS

#define CV_SEQ_READER_FIELDS ( )

Value:

int          header_size;                                       \
    CvSeq*       seq;                     \
    CvSeqBlock*  block;                          \
    schar*       ptr;          \
    schar*       block_min;  \
    schar*       block_max;        \
    int          delta_index;      \
    schar*       prev_elem;

pointer to previous element

§ CV_SEQ_SIMPLE_POLYGON

#define CV_SEQ_SIMPLE_POLYGON (CV_SEQ_FLAG_SIMPLE | CV_SEQ_POLYGON )

§ CV_SEQ_WRITER_FIELDS

#define CV_SEQ_WRITER_FIELDS ( )

Value:

int          header_size;                                      \
    CvSeq*       seq;                    \
    CvSeqBlock*  block;                         \
    schar*       ptr;                   \
    schar*       block_min;  \
    schar*       block_max;

pointer to the end of block

§ CV_SEQUENCE_FIELDS

#define CV_SEQUENCE_FIELDS ( )

Value:

CV_TREE_NODE_FIELDS(CvSeq);                                           \
    int       total;            \
    int       elem_size;        \
    schar*    block_max;        \
    schar*    ptr;              \
    int       delta_elems;      \
    CvMemStorage* storage;      \
    CvSeqBlock* free_blocks;    \
    CvSeqBlock* first;

Read/Write sequence. Elements can be dynamically inserted to or deleted from the sequence.Pointer to the first sequence block.

§ CV_SET_ELEM_FIELDS

#define CV_SET_ELEM_FIELDS ( elem_type )

Value:

int flags; \

struct elem_type* next_free;

Set Order is not preserved. There can be gaps between sequence elements. After the element has been inserted it stays in the same place all the time. The MSB(most-significant or sign bit) of the first field (flags) is 0 iff the element exists.

§ CV_SET_ELEM_FREE_FLAG

#define CV_SET_ELEM_FREE_FLAG (1 << (sizeof(int)*8-1))

§ CV_SET_ELEM_IDX_MASK

#define CV_SET_ELEM_IDX_MASK ((1 << 26) - 1)

§ CV_SET_FIELDS

#define CV_SET_FIELDS ( )

Value:

CV_SEQUENCE_FIELDS()     \
    CvSetElem* free_elems;   \
    int active_count;

§ CV_SET_MAGIC_VAL

#define CV_SET_MAGIC_VAL 0x42980000

§ CV_SIGN

#define CV_SIGN ( a ) CV_CMP((a),0)

§ CV_SORT_ASCENDING

#define CV_SORT_ASCENDING 0

§ CV_SORT_DESCENDING

#define CV_SORT_DESCENDING 16

§ CV_SORT_EVERY_COLUMN

#define CV_SORT_EVERY_COLUMN 1

§ CV_SORT_EVERY_ROW

#define CV_SORT_EVERY_ROW 0

§ CV_SPARSE_MAT_MAGIC_VAL

#define CV_SPARSE_MAT_MAGIC_VAL 0x42440000

§ CV_STORAGE_APPEND

#define CV_STORAGE_APPEND 2

§ CV_STORAGE_BASE64

#define CV_STORAGE_BASE64 64

§ CV_STORAGE_FORMAT_AUTO

#define CV_STORAGE_FORMAT_AUTO 0

§ CV_STORAGE_FORMAT_JSON

#define CV_STORAGE_FORMAT_JSON 24

§ CV_STORAGE_FORMAT_MASK

#define CV_STORAGE_FORMAT_MASK (7<<3)

§ CV_STORAGE_FORMAT_XML

#define CV_STORAGE_FORMAT_XML 8

§ CV_STORAGE_FORMAT_YAML

#define CV_STORAGE_FORMAT_YAML 16

§ CV_STORAGE_MAGIC_VAL

#define CV_STORAGE_MAGIC_VAL 0x42890000

§ CV_STORAGE_MEMORY

#define CV_STORAGE_MEMORY 4

§ CV_STORAGE_READ

#define CV_STORAGE_READ 0

Storage flags:

§ CV_STORAGE_WRITE

#define CV_STORAGE_WRITE 1

§ CV_STORAGE_WRITE_BASE64

#define CV_STORAGE_WRITE_BASE64 (CV_STORAGE_BASE64 | CV_STORAGE_WRITE)

§ CV_STORAGE_WRITE_BINARY

#define CV_STORAGE_WRITE_BINARY CV_STORAGE_WRITE

§ CV_STORAGE_WRITE_TEXT

#define CV_STORAGE_WRITE_TEXT CV_STORAGE_WRITE

§ CV_SVD

#define CV_SVD 1

§ CV_SVD_MODIFY_A

#define CV_SVD_MODIFY_A 1

§ CV_SVD_SYM

#define CV_SVD_SYM 2

§ CV_SVD_U_T

#define CV_SVD_U_T 2

§ CV_SVD_V_T

#define CV_SVD_V_T 4

§ CV_SWAP

#define CV_SWAP	(	a,
		b,
		t
	)	((t) = (a), (a) = (b), (b) = (t))

§ CV_TERMCRIT_EPS

#define CV_TERMCRIT_EPS 2

§ CV_TERMCRIT_ITER

#define CV_TERMCRIT_ITER 1

§ CV_TERMCRIT_NUMBER

#define CV_TERMCRIT_NUMBER CV_TERMCRIT_ITER

§ CV_TREE_NODE_FIELDS

#define CV_TREE_NODE_FIELDS ( node_type )

Value:

int       flags;                   \
    int       header_size;             \
    struct    node_type* h_prev;       \
    struct    node_type* h_next;       \
    struct    node_type* v_prev;       \
    struct    node_type* v_next

2nd next sequence.

§ CV_TURN_ON_IPL_COMPATIBILITY

#define CV_TURN_ON_IPL_COMPATIBILITY ( )

Value:

cvSetIPLAllocators( iplCreateImageHeader, iplAllocateImage, \

iplDeallocate, iplCreateROI, iplCloneImage )

cvSetIPLAllocators

void cvSetIPLAllocators(Cv_iplCreateImageHeader create_header, Cv_iplAllocateImageData allocate_data, Cv_iplDeallocate deallocate, Cv_iplCreateROI create_roi, Cv_iplCloneImage clone_image)

Makes OpenCV use IPL functions for allocating IplImage and IplROI structures.

§ CV_TYPE_NAME_GRAPH

#define CV_TYPE_NAME_GRAPH "opencv-graph"

§ CV_TYPE_NAME_IMAGE

#define CV_TYPE_NAME_IMAGE "opencv-image"

§ CV_TYPE_NAME_MAT

#define CV_TYPE_NAME_MAT "opencv-matrix"

§ CV_TYPE_NAME_MATND

#define CV_TYPE_NAME_MATND "opencv-nd-matrix"

§ CV_TYPE_NAME_SEQ

#define CV_TYPE_NAME_SEQ "opencv-sequence"

§ CV_TYPE_NAME_SEQ_TREE

#define CV_TYPE_NAME_SEQ_TREE "opencv-sequence-tree"

§ CV_TYPE_NAME_SPARSE_MAT

#define CV_TYPE_NAME_SPARSE_MAT "opencv-sparse-matrix"

§ CV_WHOLE_ARR

#define CV_WHOLE_ARR cvSlice( 0, 0x3fffffff )

§ CV_WHOLE_SEQ

#define CV_WHOLE_SEQ cvSlice(0, CV_WHOLE_SEQ_END_INDEX)

§ CV_WHOLE_SEQ_END_INDEX

#define CV_WHOLE_SEQ_END_INDEX 0x3fffffff

§ CV_WRITE_SEQ_ELEM

#define CV_WRITE_SEQ_ELEM	(	elem,
		writer
	)

Value:

{                                                     \
    assert( (writer).seq->elem_size == sizeof(elem)); \
    if( (writer).ptr >= (writer).block_max )          \
    {                                                 \
        cvCreateSeqBlock( &writer);                   \
    }                                                 \
    assert( (writer).ptr <= (writer).block_max - sizeof(elem));\
    memcpy((writer).ptr, &(elem), sizeof(elem));      \
    (writer).ptr += sizeof(elem);                     \
}

§ CV_WRITE_SEQ_ELEM_VAR

#define CV_WRITE_SEQ_ELEM_VAR	(	elem_ptr,
		writer
	)

Value:

{                                                     \
    if( (writer).ptr >= (writer).block_max )          \
    {                                                 \
        cvCreateSeqBlock( &writer);                   \
    }                                                 \
    memcpy((writer).ptr, elem_ptr, (writer).seq->elem_size);\
    (writer).ptr += (writer).seq->elem_size;          \
}

Add element to sequence:

§ cvAbs

#define cvAbs	(	src,
		dst
	)	cvAbsDiffS( (src), (dst), cvScalarAll(0))

§ cvAXPY

#define cvAXPY	(	A,
		real_scalar,
		B,
		C
	)	cvScaleAdd(A, cvRealScalar(real_scalar), B, C)

§ cvCheckArray

#define cvCheckArray cvCheckArr

§ cvConvert

#define cvConvert	(	src,
		dst
	)	cvConvertScale( (src), (dst), 1, 0 )

§ cvCvtScale

#define cvCvtScale cvConvertScale

§ cvCvtScaleAbs

#define cvCvtScaleAbs cvConvertScaleAbs

§ cvFFT

#define cvFFT cvDFT

§ cvFree

#define cvFree ( ptr ) (cvFree_(*(ptr)), *(ptr)=0)

§ cvGetGraphVtx

#define cvGetGraphVtx	(	graph,
		idx
	)	(CvGraphVtx)cvGetSetElem((CvSet)(graph), (idx))

Retrieves graph vertex by given index

§ cvGetSubArr

#define cvGetSubArr cvGetSubRect

§ cvGraphEdgeIdx

#define cvGraphEdgeIdx	(	graph,
		edge
	)	((edge)->flags & CV_SET_ELEM_IDX_MASK)

Retrieves index of a graph edge given its pointer

§ cvGraphFindEdge

#define cvGraphFindEdge cvFindGraphEdge

§ cvGraphFindEdgeByPtr

#define cvGraphFindEdgeByPtr cvFindGraphEdgeByPtr

§ cvGraphGetEdgeCount

#define cvGraphGetEdgeCount ( graph ) ((graph)->edges->active_count)

§ cvGraphGetVtxCount

#define cvGraphGetVtxCount ( graph ) ((graph)->active_count)

§ cvGraphVtxIdx

#define cvGraphVtxIdx	(	graph,
		vtx
	)	((vtx)->flags & CV_SET_ELEM_IDX_MASK)

Retrieves index of a graph vertex given its pointer

§ cvInv

#define cvInv cvInvert

§ cvInvSqrt

#define cvInvSqrt ( value ) ((float)(1./sqrt(value)))

§ cvMahalonobis

#define cvMahalonobis cvMahalanobis

§ cvMatMul

#define cvMatMul	(	src1,
		src2,
		dst
	)	cvMatMulAdd( (src1), (src2), NULL, (dst))

§ cvMatMulAdd

#define cvMatMulAdd	(	src1,
		src2,
		src3,
		dst
	)	cvGEMM( (src1), (src2), 1., (src3), 1., (dst), 0 )

Matrix transform: dst = A*B + C, C is optional

§ cvMatMulAddEx

#define cvMatMulAddEx cvGEMM

§ cvMatMulAddS

#define cvMatMulAddS cvTransform

§ cvMirror

#define cvMirror cvFlip

§ cvReshapeND

#define cvReshapeND	(	arr,
		header,
		new_cn,
		new_dims,
		new_sizes
	)

Value:

cvReshapeMatND( (arr), sizeof(*(header)), (header), \

(new_cn), (new_dims), (new_sizes))

cvReshapeMatND

CvArr * cvReshapeMatND(const CvArr *arr, int sizeof_header, CvArr *header, int new_cn, int new_dims, int *new_sizes)

Changes the shape of a multi-dimensional array without copying the data.

§ cvScale

#define cvScale cvConvertScale

§ cvSqrt

#define cvSqrt ( value ) ((float)sqrt(value))

§ cvT

#define cvT cvTranspose

§ cvZero

#define cvZero cvSetZero

§ IPL2CV_DEPTH

#define IPL2CV_DEPTH ( depth )

Value:

((((CV_8U)+(CV_16U<<4)+(CV_32F<<8)+(CV_64F<<16)+(CV_8S<<20)+ \
    (CV_16S<<24)+(CV_32S<<28)) >> ((((depth) & 0xF0) >> 2) + \
    (((depth) & IPL_DEPTH_SIGN) ? 20 : 0))) & 15)

§ IPL_ALIGN_16BYTES

#define IPL_ALIGN_16BYTES 16

§ IPL_ALIGN_32BYTES

#define IPL_ALIGN_32BYTES 32

§ IPL_ALIGN_4BYTES

#define IPL_ALIGN_4BYTES 4

§ IPL_ALIGN_8BYTES

#define IPL_ALIGN_8BYTES 8

§ IPL_ALIGN_DWORD

#define IPL_ALIGN_DWORD IPL_ALIGN_4BYTES

§ IPL_ALIGN_QWORD

#define IPL_ALIGN_QWORD IPL_ALIGN_8BYTES

§ IPL_BORDER_CONSTANT

#define IPL_BORDER_CONSTANT 0

§ IPL_BORDER_REFLECT

#define IPL_BORDER_REFLECT 2

§ IPL_BORDER_REFLECT_101

#define IPL_BORDER_REFLECT_101 4

extra border mode

§ IPL_BORDER_REPLICATE

#define IPL_BORDER_REPLICATE 1

§ IPL_BORDER_TRANSPARENT

#define IPL_BORDER_TRANSPARENT 5

§ IPL_BORDER_WRAP

#define IPL_BORDER_WRAP 3

§ IPL_DATA_ORDER_PIXEL

#define IPL_DATA_ORDER_PIXEL 0

§ IPL_DATA_ORDER_PLANE

#define IPL_DATA_ORDER_PLANE 1

§ IPL_DEPTH_16S

#define IPL_DEPTH_16S (IPL_DEPTH_SIGN|16)

§ IPL_DEPTH_16U

#define IPL_DEPTH_16U 16

§ IPL_DEPTH_1U

#define IPL_DEPTH_1U 1

§ IPL_DEPTH_32F

#define IPL_DEPTH_32F 32

§ IPL_DEPTH_32S

#define IPL_DEPTH_32S (IPL_DEPTH_SIGN|32)

§ IPL_DEPTH_64F

#define IPL_DEPTH_64F 64

for storing double-precision floating point data in IplImage's

§ IPL_DEPTH_8S

#define IPL_DEPTH_8S (IPL_DEPTH_SIGN| 8)

§ IPL_DEPTH_8U

#define IPL_DEPTH_8U 8

§ IPL_DEPTH_SIGN

#define IPL_DEPTH_SIGN 0x80000000

§ IPL_IMAGE_DATA

#define IPL_IMAGE_DATA 2

§ IPL_IMAGE_HEADER

#define IPL_IMAGE_HEADER 1

§ IPL_IMAGE_MAGIC_VAL

#define IPL_IMAGE_MAGIC_VAL ((int)sizeof(IplImage))

§ IPL_IMAGE_ROI

#define IPL_IMAGE_ROI 4

§ IPL_ORIGIN_BL

#define IPL_ORIGIN_BL 1

§ IPL_ORIGIN_TL

#define IPL_ORIGIN_TL 0

§ OPENCV_ASSERT

#define OPENCV_ASSERT	(	expr,
		func,
		context
	)

Value:

{if (! (expr)) \

{OPENCV_ERROR(CV_StsInternal,(func),(context));}}

OPENCV_ERROR

#define OPENCV_ERROR(status, func, context)

Definition: core_c.h:2693

CV_StsInternal

Definition: types_c.h:123

§ OPENCV_CALL

#define OPENCV_CALL ( Func )

Value:

{                                                                   \
Func;                                                           \
}

§ OPENCV_ERROR

#define OPENCV_ERROR	(	status,
		func,
		context
	)	cvError((status),(func),(context),__FILE__,__LINE__)

Typedef Documentation

§ Cv_iplAllocateImageData

typedef void(CV_STDCALL* Cv_iplAllocateImageData) (IplImage *, int, int)

§ Cv_iplCloneImage

typedef IplImage*(CV_STDCALL* Cv_iplCloneImage) (const IplImage *)

§ Cv_iplCreateImageHeader

typedef IplImage*(CV_STDCALL* Cv_iplCreateImageHeader) (int, int, int, char *, char *, int, int, int, int, int, IplROI *, IplImage *, void *, IplTileInfo *)

§ Cv_iplCreateROI

typedef IplROI*(CV_STDCALL* Cv_iplCreateROI) (int, int, int, int, int)

§ Cv_iplDeallocate

typedef void(CV_STDCALL* Cv_iplDeallocate) (IplImage *, int)

§ CvArr

typedef void CvArr

This is the "metatype" used only as a function parameter.

It denotes that the function accepts arrays of multiple types, such as IplImage*, CvMat* or even CvSeq* sometimes. The particular array type is determined at runtime by analyzing the first 4 bytes of the header. In C++ interface the role of CvArr is played by InputArray and OutputArray.

§ CvCloneFunc

typedef void*( * CvCloneFunc) (const void *struct_ptr)

§ CvCmpFunc

typedef int(* CvCmpFunc) (const void *a, const void *b, void *userdata)

a < b ? -1 : a > b ? 1 : 0

§ CvErrorCallback

typedef int( * CvErrorCallback) (int status, const char *func_name, const char *err_msg, const char *file_name, int line, void *userdata)

§ CvFileNodeHash

typedef struct CvGenericHash CvFileNodeHash

§ CvFileStorage [1/2]

typedef struct CvFileStorage CvFileStorage

"black box" representation of the file storage associated with a file on disk.

Several functions that are described below take CvFileStorage* as inputs and allow the user to save or to load hierarchical collections that consist of scalar values, standard CXCore objects (such as matrices, sequences, graphs), and user-defined objects.

OpenCV can read and write data in XML (http://www.w3c.org/XML), YAML (http://www.yaml.org) or JSON (http://www.json.org/) formats. Below is an example of 3x3 floating-point identity matrix A, stored in XML and YAML files using CXCore functions: XML:

<?xml version="1.0">
<opencv_storage>
<A type_id="opencv-matrix">
  <rows>3</rows>
  <cols>3</cols>
  <dt>f</dt>
  <data>1. 0. 0. 0. 1. 0. 0. 0. 1.</data>
</A>
</opencv_storage>

YAML:

%YAML:1.0
A: !!opencv-matrix
  rows: 3
  cols: 3
  dt: f
  data: [ 1., 0., 0., 0., 1., 0., 0., 0., 1.]

As it can be seen from the examples, XML uses nested tags to represent hierarchy, while YAML uses indentation for that purpose (similar to the Python programming language).

The same functions can read and write data in both formats; the particular format is determined by the extension of the opened file, ".xml" for XML files, ".yml" or ".yaml" for YAML and ".json" for JSON.

§ CvFileStorage [2/2]

typedef struct CvFileStorage CvFileStorage

"black box" file storage

§ CvHistType

typedef int CvHistType

§ CvIsInstanceFunc

typedef int( * CvIsInstanceFunc) (const void *struct_ptr)

§ CvPoint2DSeq

typedef CvContour CvPoint2DSeq

§ CvReadFunc

typedef void*( * CvReadFunc) (CvFileStorage *storage, CvFileNode *node)

§ CvReleaseFunc

typedef void( * CvReleaseFunc) (void **struct_dblptr)

§ CvRNG

typedef uint64 CvRNG

§ CVStatus

typedef int CVStatus

§ CvWriteFunc

typedef void( * CvWriteFunc) (CvFileStorage *storage, const char *name, const void *struct_ptr, CvAttrList attributes)

§ IplTileInfo

typedef struct _IplTileInfo IplTileInfo

Enumeration Type Documentation

§ anonymous enum

anonymous enum

See also: cv::Error::Code

Enumerator
CV_StsOk	everything is ok
CV_StsBackTrace	pseudo error for back trace
CV_StsError	unknown /unspecified error
CV_StsInternal	internal error (bad state)
CV_StsNoMem	insufficient memory
CV_StsBadArg	function arg/param is bad
CV_StsBadFunc	unsupported function
CV_StsNoConv	iter. didn't converge
CV_StsAutoTrace	tracing
CV_HeaderIsNull	image header is NULL
CV_BadImageSize	image size is invalid
CV_BadOffset	offset is invalid
CV_BadDataPtr
CV_BadStep
CV_BadModelOrChSeq
CV_BadNumChannels
CV_BadNumChannel1U
CV_BadDepth
CV_BadAlphaChannel
CV_BadOrder
CV_BadOrigin
CV_BadAlign
CV_BadCallBack
CV_BadTileSize
CV_BadCOI
CV_BadROISize
CV_MaskIsTiled
CV_StsNullPtr	null pointer
CV_StsVecLengthErr	incorrect vector length
CV_StsFilterStructContentErr	incorr. filter structure content
CV_StsKernelStructContentErr	incorr. transform kernel content
CV_StsFilterOffsetErr	incorrect filter offset value
CV_StsBadSize	the input/output structure size is incorrect
CV_StsDivByZero	division by zero
CV_StsInplaceNotSupported	in-place operation is not supported
CV_StsObjectNotFound	request can't be completed
CV_StsUnmatchedFormats	formats of input/output arrays differ
CV_StsBadFlag	flag is wrong or not supported
CV_StsBadPoint	bad CvPoint
CV_StsBadMask	bad format of mask (neither 8uC1 nor 8sC1)
CV_StsUnmatchedSizes	sizes of input/output structures do not match
CV_StsUnsupportedFormat	the data format/type is not supported by the function
CV_StsOutOfRange	some of parameters are out of range
CV_StsParseError	invalid syntax/structure of the parsed file
CV_StsNotImplemented	the requested function/feature is not implemented
CV_StsBadMemBlock	an allocated block has been corrupted
CV_StsAssert	assertion failed
CV_GpuNotSupported
CV_GpuApiCallError
CV_OpenGlNotSupported
CV_OpenGlApiCallError
CV_OpenCLApiCallError
CV_OpenCLDoubleNotSupported
CV_OpenCLInitError
CV_OpenCLNoAMDBlasFft

Function Documentation

§ CvMat()

CvMat::CvMat ( const cv::Mat & m )

§ cvAbsDiff()

void cvAbsDiff	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst
	)

dst(x,y,c) = abs(src1(x,y,c) - src2(x,y,c))

§ cvAbsDiffS()

void cvAbsDiffS	(	const CvArr *	src,
		CvArr *	dst,
		CvScalar	value
	)

dst(x,y,c) = abs(src(x,y,c) - value(c))

§ cvAdd()

void cvAdd	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(mask) = src1(mask) + src2(mask)

§ cvAddS()

void cvAddS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(mask) = src(mask) + value

§ cvAddWeighted()

void cvAddWeighted	(	const CvArr *	src1,
		double	alpha,
		const CvArr *	src2,
		double	beta,
		double	gamma,
		CvArr *	dst
	)

dst = src1 * alpha + src2 * beta + gamma

§ cvAlloc()

void* cvAlloc ( size_t size )

malloc wrapper. If there is no enough memory, the function (as well as other OpenCV functions that call cvAlloc) raises an error.

§ cvAnd()

void cvAnd	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src1(idx) & src2(idx)

§ cvAndS()

void cvAndS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src(idx) & value

§ cvAttrList()

CvAttrList cvAttrList	(	const char **	attr = `NULL`,
		CvAttrList *	next = `NULL`
	)

initializes CvAttrList structure

§ cvAttrValue()

const char* cvAttrValue	(	const CvAttrList *	attr,
		const char *	attr_name
	)

returns attribute value or 0 (NULL) if there is no such attribute

§ cvAvg()

CvScalar cvAvg	(	const CvArr *	arr,
		const CvArr *	mask = `NULL`
	)

Calculates mean value of array elements

§ cvAvgSdv()

void cvAvgSdv	(	const CvArr *	arr,
		CvScalar *	mean,
		CvScalar *	std_dev,
		const CvArr *	mask = `NULL`
	)

Calculates mean and standard deviation of pixel values

§ cvBackProjectPCA()

void cvBackProjectPCA	(	const CvArr *	proj,
		const CvArr *	mean,
		const CvArr *	eigenvects,
		CvArr *	result
	)

§ cvCalcCovarMatrix()

void cvCalcCovarMatrix	(	const CvArr **	vects,
		int	count,
		CvArr *	cov_mat,
		CvArr *	avg,
		int	flags
	)

Calculates covariation matrix for a set of vectors

See also: flags

§ cvCalcPCA()

void cvCalcPCA	(	const CvArr *	data,
		CvArr *	mean,
		CvArr *	eigenvals,
		CvArr *	eigenvects,
		int	flags
	)

§ cvCartToPolar()

void cvCartToPolar	(	const CvArr *	x,
		const CvArr *	y,
		CvArr *	magnitude,
		CvArr *	angle = `NULL`,
		int	angle_in_degrees = `0`
	)

Does cartesian->polar coordinates conversion. Either of output components (magnitude or angle) is optional

§ cvCbrt()

float cvCbrt ( float value )

Fast cubic root calculation

§ cvChangeSeqBlock()

void cvChangeSeqBlock	(	void *	reader,
		int	direction
	)

§ cvCheckArr()

int cvCheckArr	(	const CvArr *	arr,
		int	flags = `0`,
		double	min_val = `0`,
		double	max_val = `0`
	)

Checks array values for NaNs, Infs or simply for too large numbers (if CV_CHECK_RANGE is set). If CV_CHECK_QUIET is set, no runtime errors is raised (function returns zero value in case of "bad" values). Otherwise cvError is called

§ cvCheckHardwareSupport()

int cvCheckHardwareSupport ( int feature )

§ cvCheckTermCriteria()

CvTermCriteria cvCheckTermCriteria	(	CvTermCriteria	criteria,
		double	default_eps,
		int	default_max_iters
	)

checks termination criteria validity and sets eps to default_eps (if it is not set), max_iter to default_max_iters (if it is not set)

§ cvClearGraph()

void cvClearGraph ( CvGraph * graph )

Remove all vertices and edges from the graph

§ cvClearMemStorage()

void cvClearMemStorage ( CvMemStorage * storage )

Clears memory storage. This is the only way(!!!) (besides cvRestoreMemStoragePos) to reuse memory allocated for the storage - cvClearSeq,cvClearSet ... do not free any memory. A child storage returns all the blocks to the parent when it is cleared

§ cvClearND()

void cvClearND	(	CvArr *	arr,
		const int *	idx
	)

clears element of ND dense array, in case of sparse arrays it deletes the specified node

§ cvClearSeq()

void cvClearSeq ( CvSeq * seq )

Removes all the elements from the sequence. The freed memory can be reused later only by the same sequence unless cvClearMemStorage or cvRestoreMemStoragePos is called

§ cvClearSet()

void cvClearSet ( CvSet * set_header )

Removes all the elements from the set

§ cvClone()

void* cvClone ( const void * struct_ptr )

Makes a clone of an object.

The function finds the type of a given object and calls clone with the passed object. Of course, if you know the object type, for example, struct_ptr is CvMat*, it is faster to call the specific function, like cvCloneMat.

Parameters

struct_ptr The object to clone

§ cvCloneGraph()

CvGraph* cvCloneGraph	(	const CvGraph *	graph,
		CvMemStorage *	storage
	)

Creates a copy of graph

§ cvCloneImage()

IplImage* cvCloneImage ( const IplImage * image )

Creates a copy of IPL image (widthStep may differ)

§ cvCloneMat()

CvMat* cvCloneMat ( const CvMat * mat )

Creates an exact copy of the input matrix (except, may be, step value)

§ cvCloneMatND()

CvMatND* cvCloneMatND ( const CvMatND * mat )

Creates a copy of CvMatND (except, may be, steps)

§ cvCloneSeq()

CvSeq* cvCloneSeq	(	const CvSeq *	seq,
		CvMemStorage *	storage = `NULL`
	)

§ cvCloneSparseMat()

CvSparseMat* cvCloneSparseMat ( const CvSparseMat * mat )

Creates a copy of CvSparseMat (except, may be, zero items)

§ cvCmp()

void cvCmp	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		int	cmp_op
	)

The comparison operation support single-channel arrays only. Destination image should be 8uC1 or 8sC1 dst(idx) = src1(idx) cmp_op src2(idx)

§ cvCmpS()

void cvCmpS	(	const CvArr *	src,
		double	value,
		CvArr *	dst,
		int	cmp_op
	)

dst(idx) = src1(idx) cmp_op value

§ cvCompleteSymm()

void cvCompleteSymm	(	CvMat *	matrix,
		int	LtoR = `0`
	)

Completes the symmetric matrix from the lower (LtoR=0) or from the upper (LtoR!=0) part

§ cvConvertScale()

void cvConvertScale	(	const CvArr *	src,
		CvArr *	dst,
		double	scale = `1`,
		double	shift = `0`
	)

Converts one array to another with optional linear transformation.

The function has several different purposes, and thus has several different names. It copies one array to another with optional scaling, which is performed first, and/or optional type conversion, performed after:

\[\texttt{dst} (I) = \texttt{scale} \texttt{src} (I) + ( \texttt{shift} _0, \texttt{shift} _1,...)\]

All the channels of multi-channel arrays are processed independently.

The type of conversion is done with rounding and saturation, that is if the result of scaling + conversion can not be represented exactly by a value of the destination array element type, it is set to the nearest representable value on the real axis.

Parameters

src	Source array
dst	Destination array
scale	Scale factor
shift	Value added to the scaled source array elements

§ cvConvertScaleAbs()

void cvConvertScaleAbs	(	const CvArr *	src,
		CvArr *	dst,
		double	scale = `1`,
		double	shift = `0`
	)

Performs linear transformation on every source array element, stores absolute value of the result: dst(x,y,c) = abs(scale*src(x,y,c)+shift). destination array must have 8u type. In other cases one may use cvConvertScale + cvAbsDiffS

§ cvCopy()

void cvCopy	(	const CvArr *	src,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

Copies one array to another.

The function copies selected elements from an input array to an output array:

\[\texttt{dst} (I)= \texttt{src} (I) \quad \text{if} \quad \texttt{mask} (I) \ne 0.\]

If any of the passed arrays is of IplImage type, then its ROI and COI fields are used. Both arrays must have the same type, the same number of dimensions, and the same size. The function can also copy sparse arrays (mask is not supported in this case).

Parameters

src	The source array
dst	The destination array
mask	Operation mask, 8-bit single channel array; specifies elements of the destination array to be changed

§ cvCountNonZero()

int cvCountNonZero ( const CvArr * arr )

Calculates number of non-zero pixels

§ cvCreateChildMemStorage()

CvMemStorage* cvCreateChildMemStorage ( CvMemStorage * parent )

Creates a memory storage that will borrow memory blocks from parent storage

§ cvCreateData()

void cvCreateData ( CvArr * arr )

Allocates array data.

The function allocates image, matrix or multi-dimensional dense array data. Note that in the case of matrix types OpenCV allocation functions are used. In the case of IplImage they are used unless CV_TURN_ON_IPL_COMPATIBILITY() has been called before. In the latter case IPL functions are used to allocate the data.

Parameters

arr	Array header

§ cvCreateGraph()

CvGraph* cvCreateGraph	(	int	graph_flags,
		int	header_size,
		int	vtx_size,
		int	edge_size,
		CvMemStorage *	storage
	)

Creates new graph

§ cvCreateGraphScanner()

CvGraphScanner* cvCreateGraphScanner	(	CvGraph *	graph,
		CvGraphVtx *	vtx = `NULL`,
		int	mask = `-1`
	)

Creates new graph scanner.

§ cvCreateImage()

IplImage* cvCreateImage	(	CvSize	size,
		int	depth,
		int	channels
	)

Creates an image header and allocates the image data.

This function call is equivalent to the following code:

header = cvCreateImageHeader(size, depth, channels);

cvCreateData(header);

Parameters

size	Image width and height
depth	Bit depth of image elements. See IplImage for valid depths.
channels	Number of channels per pixel. See IplImage for details. This function only creates images with interleaved channels.

§ cvCreateImageHeader()

IplImage* cvCreateImageHeader	(	CvSize	size,
		int	depth,
		int	channels
	)

Creates an image header but does not allocate the image data.

Parameters

size	Image width and height
depth	Image depth (see cvCreateImage )
channels	Number of channels (see cvCreateImage )

§ cvCreateMat()

CvMat* cvCreateMat	(	int	rows,
		int	cols,
		int	type
	)

Creates a matrix header and allocates the matrix data.

The function call is equivalent to the following code:

CvMat* mat = cvCreateMatHeader(rows, cols, type);

cvCreateData(mat);

Parameters

rows	Number of rows in the matrix
cols	Number of columns in the matrix
type	The type of the matrix elements in the form CV_<bit depth><S\|U\|F>C<number of channels> , where S=signed, U=unsigned, F=float. For example, CV _ 8UC1 means the elements are 8-bit unsigned and the there is 1 channel, and CV _ 32SC2 means the elements are 32-bit signed and there are 2 channels.

§ cvCreateMatHeader()

CvMat* cvCreateMatHeader	(	int	rows,
		int	cols,
		int	type
	)

Creates a matrix header but does not allocate the matrix data.

The function allocates a new matrix header and returns a pointer to it. The matrix data can then be allocated using cvCreateData or set explicitly to user-allocated data via cvSetData.

Parameters

rows	Number of rows in the matrix
cols	Number of columns in the matrix
type	Type of the matrix elements, see cvCreateMat

§ cvCreateMatND()

CvMatND* cvCreateMatND	(	int	dims,
		const int *	sizes,
		int	type
	)

Creates the header and allocates the data for a multi-dimensional dense array.

This function call is equivalent to the following code:

CvMatND* mat = cvCreateMatNDHeader(dims, sizes, type);

cvCreateData(mat);

Parameters

dims	Number of array dimensions. This must not exceed CV_MAX_DIM (32 by default, but can be changed at build time).
sizes	Array of dimension sizes.
type	Type of array elements, see cvCreateMat .

§ cvCreateMatNDHeader()

CvMatND* cvCreateMatNDHeader	(	int	dims,
		const int *	sizes,
		int	type
	)

Creates a new matrix header but does not allocate the matrix data.

The function allocates a header for a multi-dimensional dense array. The array data can further be allocated using cvCreateData or set explicitly to user-allocated data via cvSetData.

Parameters

dims	Number of array dimensions
sizes	Array of dimension sizes
type	Type of array elements, see cvCreateMat

§ cvCreateMemStorage()

CvMemStorage* cvCreateMemStorage ( int block_size = 0 )

Creates new memory storage. block_size == 0 means that default, somewhat optimal size, is used (currently, it is 64K)

§ cvCreateSeq()

CvSeq* cvCreateSeq	(	int	seq_flags,
		size_t	header_size,
		size_t	elem_size,
		CvMemStorage *	storage
	)

Creates new empty sequence that will reside in the specified storage

§ cvCreateSeqBlock()

void cvCreateSeqBlock ( CvSeqWriter * writer )

§ cvCreateSet()

CvSet* cvCreateSet	(	int	set_flags,
		int	header_size,
		int	elem_size,
		CvMemStorage *	storage
	)

Creates a new set

§ cvCreateSparseMat() [1/2]

CvSparseMat* cvCreateSparseMat	(	int	dims,
		const int *	sizes,
		int	type
	)

Creates sparse array.

The function allocates a multi-dimensional sparse array. Initially the array contain no elements, that is PtrND and other related functions will return 0 for every index.

Parameters

dims	Number of array dimensions. In contrast to the dense matrix, the number of dimensions is practically unlimited (up to \(2^{16}\) ).
sizes	Array of dimension sizes
type	Type of array elements. The same as for CvMat

§ cvCreateSparseMat() [2/2]

CvSparseMat* cvCreateSparseMat ( const cv::SparseMat & m )

§ cvCrossProduct()

void cvCrossProduct	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst
	)

Calculates the cross product of two 3D vectors.

The function calculates the cross product of two 3D vectors:

\[\texttt{dst} = \texttt{src1} \times \texttt{src2}\]

or:

\[\begin{array}{l} \texttt{dst} _1 = \texttt{src1} _2 \texttt{src2} _3 - \texttt{src1} _3 \texttt{src2} _2 \\ \texttt{dst} _2 = \texttt{src1} _3 \texttt{src2} _1 - \texttt{src1} _1 \texttt{src2} _3 \\ \texttt{dst} _3 = \texttt{src1} _1 \texttt{src2} _2 - \texttt{src1} _2 \texttt{src2} _1 \end{array}\]

Parameters

src1	The first source vector
src2	The second source vector
dst	The destination vector

§ cvCvtSeqToArray()

void* cvCvtSeqToArray	(	const CvSeq *	seq,
		void *	elements,
		CvSlice	slice = `CV_WHOLE_SEQ`
	)

Copies sequence content to a continuous piece of memory

§ cvDCT()

void cvDCT	(	const CvArr *	src,
		CvArr *	dst,
		int	flags
	)

Discrete Cosine Transform

See also: core_c_DftFlags "flags"

§ cvDecRefData()

void cvDecRefData ( CvArr * arr )

Decrements an array data reference counter.

The function decrements the data reference counter in a CvMat or CvMatND if the reference counter

pointer is not NULL. If the counter reaches zero, the data is deallocated. In the current implementation the reference counter is not NULL only if the data was allocated using the cvCreateData function. The counter will be NULL in other cases such as: external data was assigned to the header using cvSetData, header is part of a larger matrix or image, or the header was converted from an image or n-dimensional matrix header.

Parameters

arr	Pointer to an array header

§ cvDet()

double cvDet ( const CvArr * mat )

Calculates determinant of input matrix

§ cvDFT()

void cvDFT	(	const CvArr *	src,
		CvArr *	dst,
		int	flags,
		int	nonzero_rows = `0`
	)

Discrete Fourier Transform: complex->complex, real->ccs (forward), ccs->real (inverse)

See also: core_c_DftFlags "flags"

§ cvDiv()

void cvDiv	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		double	scale = `1`
	)

element-wise division/inversion with scaling: dst(idx) = src1(idx) * scale / src2(idx) or dst(idx) = scale / src2(idx) if src1 == 0

§ cvDotProduct()

double cvDotProduct	(	const CvArr *	src1,
		const CvArr *	src2
	)

Calculates the dot product of two arrays in Euclidean metrics.

The function calculates and returns the Euclidean dot product of two arrays.

\[src1 \bullet src2 = \sum _I ( \texttt{src1} (I) \texttt{src2} (I))\]

In the case of multiple channel arrays, the results for all channels are accumulated. In particular, cvDotProduct(a,a) where a is a complex vector, will return \(||\texttt{a}||^2\). The function can process multi-dimensional arrays, row by row, layer by layer, and so on.

Parameters

src1	The first source array
src2	The second source array

§ cvEigenVV()

void cvEigenVV	(	CvArr *	mat,
		CvArr *	evects,
		CvArr *	evals,
		double	eps = `0`,
		int	lowindex = `-1`,
		int	highindex = `-1`
	)

Finds eigen values and vectors of a symmetric matrix

§ cvEndWriteSeq()

CvSeq* cvEndWriteSeq ( CvSeqWriter * writer )

Closes sequence writer, updates sequence header and returns pointer to the resultant sequence (which may be useful if the sequence was created using cvStartWriteSeq))

§ cvEndWriteStruct()

void cvEndWriteStruct ( CvFileStorage * fs )

Finishes writing to a file node collection.

Parameters

fs	File storage

See also: cvStartWriteStruct.

§ cvError()

void cvError	(	int	status,
		const char *	func_name,
		const char *	err_msg,
		const char *	file_name,
		int	line
	)

Sets error status and performs some additonal actions (displaying message box, writing message to stderr, terminating application etc.) depending on the current error mode

§ cvErrorFromIppStatus()

int cvErrorFromIppStatus ( int ipp_status )

Maps IPP error codes to the counterparts from OpenCV

§ cvErrorStr()

const char* cvErrorStr ( int status )

Retrieves textual description of the error given its code

§ cvExp()

void cvExp	(	const CvArr *	src,
		CvArr *	dst
	)

Does exponention: dst(idx) = exp(src(idx)). Overflow is not handled yet. Underflow is handled. Maximal relative error is ~7e-6 for single-precision input

§ cvFastArctan()

float cvFastArctan	(	float	y,
		float	x
	)

Fast arctangent calculation

§ cvFindGraphEdge()

CvGraphEdge* cvFindGraphEdge	(	const CvGraph *	graph,
		int	start_idx,
		int	end_idx
	)

Find edge connecting two vertices

§ cvFindGraphEdgeByPtr()

CvGraphEdge* cvFindGraphEdgeByPtr	(	const CvGraph *	graph,
		const CvGraphVtx *	start_vtx,
		const CvGraphVtx *	end_vtx
	)

§ cvFindType()

CvTypeInfo* cvFindType ( const char * type_name )

Finds a type by its name.

The function finds a registered type by its name. It returns NULL if there is no type with the specified name.

Parameters

type_name Type name

§ cvFirstType()

CvTypeInfo* cvFirstType ( void )

Returns the beginning of a type list.

The function returns the first type in the list of registered types. Navigation through the list can be done via the prev and next fields of the CvTypeInfo structure.

§ cvFlip()

void cvFlip	(	const CvArr *	src,
		CvArr *	dst = `NULL`,
		int	flip_mode = `0`
	)

Mirror array data around horizontal (flip=0), vertical (flip=1) or both(flip=-1) axises: cvFlip(src) flips images vertically and sequences horizontally (inplace)

§ cvFlushSeqWriter()

void cvFlushSeqWriter ( CvSeqWriter * writer )

Updates sequence header. May be useful to get access to some of previously written elements via cvGetSeqElem or sequence reader

§ cvFree_()

void cvFree_ ( void * ptr )

free wrapper. Here and further all the memory releasing functions (that all call cvFree) take double pointer in order to to clear pointer to the data after releasing it. Passing pointer to NULL pointer is Ok: nothing happens in this case

§ cvGEMM()

void cvGEMM	(	const CvArr *	src1,
		const CvArr *	src2,
		double	alpha,
		const CvArr *	src3,
		double	beta,
		CvArr *	dst,
		int	tABC = `0`
	)

Extended matrix transform: dst = alpha*op(A)*op(B) + beta*op(C), where op(X) is X or X^T

§ cvGet1D()

CvScalar cvGet1D	(	const CvArr *	arr,
		int	idx0
	)

Return a specific array element.

The functions return a specific array element. In the case of a sparse array the functions return 0 if the requested node does not exist (no new node is created by the functions).

Parameters

arr	Input array
idx0	The first zero-based component of the element index

§ cvGet2D()

CvScalar cvGet2D	(	const CvArr *	arr,
		int	idx0,
		int	idx1
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvGet3D()

CvScalar cvGet3D	(	const CvArr *	arr,
		int	idx0,
		int	idx1,
		int	idx2
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvGetCol()

CvMat* cvGetCol	(	const CvArr *	arr,
		CvMat *	submat,
		int	col
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
submat	Pointer to the resulting sub-array header
col	Zero-based index of the selected column

§ cvGetCols()

CvMat* cvGetCols	(	const CvArr *	arr,
		CvMat *	submat,
		int	start_col,
		int	end_col
	)

Returns one of more array columns.

The functions return the header, corresponding to a specified column span of the input array. That

is, no data is copied. Therefore, any modifications of the submatrix will affect the original array. If you need to copy the columns, use cvCloneMat. cvGetCol(arr, submat, col) is a shortcut for cvGetCols(arr, submat, col, col+1).

Parameters

arr	Input array
submat	Pointer to the resulting sub-array header
start_col	Zero-based index of the starting column (inclusive) of the span
end_col	Zero-based index of the ending column (exclusive) of the span

§ cvGetDiag()

CvMat* cvGetDiag	(	const CvArr *	arr,
		CvMat *	submat,
		int	diag = `0`
	)

Returns one of array diagonals.

The function returns the header, corresponding to a specified diagonal of the input array.

Parameters

arr	Input array
submat	Pointer to the resulting sub-array header
diag	Index of the array diagonal. Zero value corresponds to the main diagonal, -1 corresponds to the diagonal above the main, 1 corresponds to the diagonal below the main, and so forth.

§ cvGetDims()

int cvGetDims	(	const CvArr *	arr,
		int *	sizes = `NULL`
	)

Return number of array dimensions.

The function returns the array dimensionality and the array of dimension sizes. In the case of IplImage or CvMat it always returns 2 regardless of number of image/matrix rows. For example, the following code calculates total number of array elements:

int sizes[CV_MAX_DIM];
int i, total = 1;
int dims = cvGetDims(arr, size);
for(i = 0; i < dims; i++ )
    total *= sizes[i];

Parameters

arr	Input array
sizes	Optional output vector of the array dimension sizes. For 2d arrays the number of rows (height) goes first, number of columns (width) next.

§ cvGetDimSize()

int cvGetDimSize	(	const CvArr *	arr,
		int	index
	)

Returns array size along the specified dimension.

Parameters

arr	Input array
index	Zero-based dimension index (for matrices 0 means number of rows, 1 means number of columns; for images 0 means height, 1 means width)

§ cvGetElemType()

int cvGetElemType ( const CvArr * arr )

Returns type of array elements.

The function returns type of the array elements. In the case of IplImage the type is converted to CvMat-like representation. For example, if the image has been created as:

IplImage* img = cvCreateImage(cvSize(640, 480), IPL_DEPTH_8U, 3);

The code cvGetElemType(img) will return CV_8UC3.

Parameters

arr	Input array

§ cvGetErrInfo()

int cvGetErrInfo	(	const char **	errcode_desc,
		const char **	description,
		const char **	filename,
		int *	line
	)

Retrieves detailed information about the last error occured

§ cvGetErrMode()

int cvGetErrMode ( void )

Retrives current error processing mode

§ cvGetErrStatus()

int cvGetErrStatus ( void )

Get current OpenCV error status

§ cvGetFileNode()

CvFileNode* cvGetFileNode	(	CvFileStorage *	fs,
		CvFileNode *	map,
		const CvStringHashNode *	key,
		int	create_missing = `0`
	)

Finds a node in a map or file storage.

The function finds a file node. It is a faster version of cvGetFileNodeByName (see cvGetHashedKey discussion). Also, the function can insert a new node, if it is not in the map yet.

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches a top-level node. If both map and key are NULLs, the function returns the root file node - a map that contains top-level nodes.
key	Unique pointer to the node name, retrieved with cvGetHashedKey
create_missing	Flag that specifies whether an absent node should be added to the map

§ cvGetFileNodeByName()

CvFileNode* cvGetFileNodeByName	(	const CvFileStorage *	fs,
		const CvFileNode *	map,
		const char *	name
	)

Finds a node in a map or file storage.

The function finds a file node by name. The node is searched either in map or, if the pointer is NULL, among the top-level file storage nodes. Using this function for maps and cvGetSeqElem (or sequence reader) for sequences, it is possible to navigate through the file storage. To speed up multiple queries for a certain key (e.g., in the case of an array of structures) one may use a combination of cvGetHashedKey and cvGetFileNode.

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches in all the top-level nodes (streams), starting with the first one.
name	The file node name

§ cvGetFileNodeName()

const char* cvGetFileNodeName ( const CvFileNode * node )

Returns the name of a file node.

The function returns the name of a file node or NULL, if the file node does not have a name or if node is NULL.

Parameters

node File node

§ cvGetHashedKey()

CvStringHashNode* cvGetHashedKey	(	CvFileStorage *	fs,
		const char *	name,
		int	len = `-1`,
		int	create_missing = `0`
	)

Returns a unique pointer for a given name.

The function returns a unique pointer for each particular file node name. This pointer can be then passed to the cvGetFileNode function that is faster than cvGetFileNodeByName because it compares text strings by comparing pointers rather than the strings' content.

Consider the following example where an array of points is encoded as a sequence of 2-entry maps:

points:
  - { x: 10, y: 10 }
  - { x: 20, y: 20 }
  - { x: 30, y: 30 }
  # ...

Then, it is possible to get hashed "x" and "y" pointers to speed up decoding of the points. :

#include "cxcore.h"
int main( int argc, char** argv )
{
    CvFileStorage* fs = cvOpenFileStorage( "points.yml", 0, CV_STORAGE_READ );
    CvStringHashNode* x_key = cvGetHashedNode( fs, "x", -1, 1 );
    CvStringHashNode* y_key = cvGetHashedNode( fs, "y", -1, 1 );
    CvFileNode* points = cvGetFileNodeByName( fs, 0, "points" );
    if( CV_NODE_IS_SEQ(points->tag) )
    {
        CvSeq* seq = points->data.seq;
        int i, total = seq->total;
        CvSeqReader reader;
        cvStartReadSeq( seq, &reader, 0 );
        for( i = 0; i < total; i++ )
        {
            CvFileNode* pt = (CvFileNode*)reader.ptr;
#if 1 // faster variant
            CvFileNode* xnode = cvGetFileNode( fs, pt, x_key, 0 );
            CvFileNode* ynode = cvGetFileNode( fs, pt, y_key, 0 );
            assert( xnode && CV_NODE_IS_INT(xnode->tag) &&
                    ynode && CV_NODE_IS_INT(ynode->tag));
            int x = xnode->data.i; // or x = cvReadInt( xnode, 0 );
            int y = ynode->data.i; // or y = cvReadInt( ynode, 0 );
#elif 1 // slower variant; does not use x_key & y_key
            CvFileNode* xnode = cvGetFileNodeByName( fs, pt, "x" );
            CvFileNode* ynode = cvGetFileNodeByName( fs, pt, "y" );
            assert( xnode && CV_NODE_IS_INT(xnode->tag) &&
                    ynode && CV_NODE_IS_INT(ynode->tag));
            int x = xnode->data.i; // or x = cvReadInt( xnode, 0 );
            int y = ynode->data.i; // or y = cvReadInt( ynode, 0 );
#else // the slowest yet the easiest to use variant
            int x = cvReadIntByName( fs, pt, "x", 0 );
            int y = cvReadIntByName( fs, pt, "y", 0 );
#endif
            CV_NEXT_SEQ_ELEM( seq->elem_size, reader );
            printf("
        }
    }
    cvReleaseFileStorage( &fs );
    return 0;
}

Please note that whatever method of accessing a map you are using, it is still much slower than using plain sequences; for example, in the above example, it is more efficient to encode the points as pairs of integers in a single numeric sequence.

Parameters

fs	File storage
name	Literal node name
len	Length of the name (if it is known apriori), or -1 if it needs to be calculated
create_missing	Flag that specifies, whether an absent key should be added into the hash table

§ cvGetImage()

IplImage* cvGetImage	(	const CvArr *	arr,
		IplImage *	image_header
	)

Returns image header for arbitrary array.

The function returns the image header for the input array that can be a matrix (CvMat) or image (IplImage). In the case of an image the function simply returns the input pointer. In the case of CvMat it initializes an image_header structure with the parameters of the input matrix. Note that if we transform IplImage to CvMat using cvGetMat and then transform CvMat back to IplImage using this function, we will get different headers if the ROI is set in the original image.

Parameters

arr	Input array
image_header	Pointer to IplImage structure used as a temporary buffer

§ cvGetImageCOI()

int cvGetImageCOI ( const IplImage * image )

Returns the index of the channel of interest.

Returns the channel of interest of in an IplImage. Returned values correspond to the coi in cvSetImageCOI.

Parameters

image A pointer to the image header

§ cvGetImageROI()

CvRect cvGetImageROI ( const IplImage * image )

Returns the image ROI.

If there is no ROI set, cvRect(0,0,image->width,image->height) is returned.

Parameters

image A pointer to the image header

§ cvGetMat()

CvMat* cvGetMat	(	const CvArr *	arr,
		CvMat *	header,
		int *	coi = `NULL`,
		int	allowND = `0`
	)

Returns matrix header for arbitrary array.

The function returns a matrix header for the input array that can be a matrix - CvMat, an image - IplImage, or a multi-dimensional dense array - CvMatND (the third option is allowed only if allowND != 0) . In the case of matrix the function simply returns the input pointer. In the case of IplImage* or CvMatND it initializes the header structure with parameters of the current image ROI and returns &header. Because COI is not supported by CvMat, it is returned separately.

The function provides an easy way to handle both types of arrays - IplImage and CvMat using the same code. Input array must have non-zero data pointer, otherwise the function will report an error.

Note: If the input array is IplImage with planar data layout and COI set, the function returns the pointer to the selected plane and COI == 0. This feature allows user to process IplImage structures with planar data layout, even though OpenCV does not support such images.

Parameters

arr	Input array
header	Pointer to CvMat structure used as a temporary buffer
coi	Optional output parameter for storing COI
allowND	If non-zero, the function accepts multi-dimensional dense arrays (CvMatND*) and returns 2D matrix (if CvMatND has two dimensions) or 1D matrix (when CvMatND has 1 dimension or more than 2 dimensions). The CvMatND array must be continuous.

See also: cvGetImage, cvarrToMat.

§ cvGetND()

CvScalar cvGetND	(	const CvArr *	arr,
		const int *	idx
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
idx	Array of the element indices

§ cvGetNextSparseNode()

CvSparseNode* cvGetNextSparseNode ( CvSparseMatIterator * mat_iterator )

Returns the next sparse matrix element.

The function moves iterator to the next sparse matrix element and returns pointer to it. In the current version there is no any particular order of the elements, because they are stored in the hash table. The sample below demonstrates how to iterate through the sparse matrix:

// print all the non-zero sparse matrix elements and compute their sum
double sum = 0;
int i, dims = cvGetDims(sparsemat);
CvSparseMatIterator it;
CvSparseNode* node = cvInitSparseMatIterator(sparsemat, &it);
for(; node != 0; node = cvGetNextSparseNode(&it))
{
    int* idx = CV_NODE_IDX(array, node);
    float val = *(float*)CV_NODE_VAL(array, node);
    printf("M");
    for(i = 0; i < dims; i++ )
        printf("[%d]", idx[i]);
    printf("=%g\n", val);
    sum += val;
}
printf("nTotal sum = %g\n", sum);

Parameters

mat_iterator Sparse array iterator

§ cvGetNumThreads()

int cvGetNumThreads ( void )

retrieve/set the number of threads used in OpenMP implementations

§ cvGetOptimalDFTSize()

int cvGetOptimalDFTSize ( int size0 )

Finds optimal DFT vector size >= size0

§ cvGetRawData()

void cvGetRawData	(	const CvArr *	arr,
		uchar **	data,
		int *	step = `NULL`,
		CvSize *	roi_size = `NULL`
	)

Retrieves low-level information about the array.

The function fills output variables with low-level information about the array data. All output

parameters are optional, so some of the pointers may be set to NULL. If the array is IplImage with ROI set, the parameters of ROI are returned.

The following example shows how to get access to array elements. It computes absolute values of the array elements :

float* data;
int step;
CvSize size;
cvGetRawData(array, (uchar**)&data, &step, &size);
step /= sizeof(data[0]);
for(int y = 0; y < size.height; y++, data += step )
    for(int x = 0; x < size.width; x++ )
        data[x] = (float)fabs(data[x]);

Parameters

arr	Array header
data	Output pointer to the whole image origin or ROI origin if ROI is set
step	Output full row length in bytes
roi_size	Output ROI size

§ cvGetReal1D()

double cvGetReal1D	(	const CvArr *	arr,
		int	idx0
	)

Return a specific element of single-channel 1D, 2D, 3D or nD array.

Returns a specific element of a single-channel array. If the array has multiple channels, a runtime error is raised. Note that Get?D functions can be used safely for both single-channel and multiple-channel arrays though they are a bit slower.

In the case of a sparse array the functions return 0 if the requested node does not exist (no new node is created by the functions).

Parameters

arr	Input array. Must have a single channel.
idx0	The first zero-based component of the element index

§ cvGetReal2D()

double cvGetReal2D	(	const CvArr *	arr,
		int	idx0,
		int	idx1
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvGetReal3D()

double cvGetReal3D	(	const CvArr *	arr,
		int	idx0,
		int	idx1,
		int	idx2
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvGetRealND()

double cvGetRealND	(	const CvArr *	arr,
		const int *	idx
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array. Must have a single channel.
idx	Array of the element indices

§ cvGetRootFileNode()

CvFileNode* cvGetRootFileNode	(	const CvFileStorage *	fs,
		int	stream_index = `0`
	)

Retrieves one of the top-level nodes of the file storage.

The function returns one of the top-level file nodes. The top-level nodes do not have a name, they correspond to the streams that are stored one after another in the file storage. If the index is out of range, the function returns a NULL pointer, so all the top-level nodes can be iterated by subsequent calls to the function with stream_index=0,1,..., until the NULL pointer is returned. This function can be used as a base for recursive traversal of the file storage.

Parameters

fs	File storage
stream_index	Zero-based index of the stream. See cvStartNextStream . In most cases, there is only one stream in the file; however, there can be several.

§ cvGetRow()

CvMat* cvGetRow	(	const CvArr *	arr,
		CvMat *	submat,
		int	row
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
submat	Pointer to the resulting sub-array header
row	Zero-based index of the selected row

§ cvGetRows()

CvMat* cvGetRows	(	const CvArr *	arr,
		CvMat *	submat,
		int	start_row,
		int	end_row,
		int	delta_row = `1`
	)

Returns array row or row span.

The functions return the header, corresponding to a specified row/row span of the input array. cvGetRow(arr, submat, row) is a shortcut for cvGetRows(arr, submat, row, row+1).

Parameters

arr	Input array
submat	Pointer to the resulting sub-array header
start_row	Zero-based index of the starting row (inclusive) of the span
end_row	Zero-based index of the ending row (exclusive) of the span
delta_row	Index step in the row span. That is, the function extracts every delta_row -th row from start_row and up to (but not including) end_row .

§ cvGetSeqElem()

schar* cvGetSeqElem	(	const CvSeq *	seq,
		int	index
	)

Retrieves pointer to specified sequence element. Negative indices are supported and mean counting from the end (e.g -1 means the last sequence element)

§ cvGetSeqReaderPos()

int cvGetSeqReaderPos ( CvSeqReader * reader )

Returns current sequence reader position (currently observed sequence element)

§ cvGetSetElem()

CvSetElem* cvGetSetElem	(	const CvSet *	set_header,
		int	idx
	)

Returns a set element by index. If the element doesn't belong to the set, NULL is returned

§ cvGetSize()

CvSize cvGetSize ( const CvArr * arr )

Returns size of matrix or image ROI.

The function returns number of rows (CvSize::height) and number of columns (CvSize::width) of the input matrix or image. In the case of image the size of ROI is returned.

Parameters

arr	array header

§ cvGetSubRect()

CvMat* cvGetSubRect	(	const CvArr *	arr,
		CvMat *	submat,
		CvRect	rect
	)

Returns matrix header corresponding to the rectangular sub-array of input image or matrix.

The function returns header, corresponding to a specified rectangle of the input array. In other

words, it allows the user to treat a rectangular part of input array as a stand-alone array. ROI is taken into account by the function so the sub-array of ROI is actually extracted.

Parameters

arr	Input array
submat	Pointer to the resultant sub-array header
rect	Zero-based coordinates of the rectangle of interest

§ cvGetThreadNum()

int cvGetThreadNum ( void )

get index of the thread being executed

§ cvGetTickCount()

int64 cvGetTickCount ( void )

helper functions for RNG initialization and accurate time measurement: uses internal clock counter on x86

§ cvGetTickFrequency()

double cvGetTickFrequency ( void )

§ cvGraphAddEdge()

int cvGraphAddEdge	(	CvGraph *	graph,
		int	start_idx,
		int	end_idx,
		const CvGraphEdge *	edge = `NULL`,
		CvGraphEdge **	inserted_edge = `NULL`
	)

Link two vertices specifed by indices or pointers if they are not connected or return pointer to already existing edge connecting the vertices. Functions return 1 if a new edge was created, 0 otherwise

§ cvGraphAddEdgeByPtr()

int cvGraphAddEdgeByPtr	(	CvGraph *	graph,
		CvGraphVtx *	start_vtx,
		CvGraphVtx *	end_vtx,
		const CvGraphEdge *	edge = `NULL`,
		CvGraphEdge **	inserted_edge = `NULL`
	)

§ cvGraphAddVtx()

int cvGraphAddVtx	(	CvGraph *	graph,
		const CvGraphVtx *	vtx = `NULL`,
		CvGraphVtx **	inserted_vtx = `NULL`
	)

Adds new vertex to the graph

§ cvGraphRemoveEdge()

void cvGraphRemoveEdge	(	CvGraph *	graph,
		int	start_idx,
		int	end_idx
	)

Remove edge connecting two vertices

§ cvGraphRemoveEdgeByPtr()

void cvGraphRemoveEdgeByPtr	(	CvGraph *	graph,
		CvGraphVtx *	start_vtx,
		CvGraphVtx *	end_vtx
	)

§ cvGraphRemoveVtx()

int cvGraphRemoveVtx	(	CvGraph *	graph,
		int	index
	)

Removes vertex from the graph together with all incident edges

§ cvGraphRemoveVtxByPtr()

int cvGraphRemoveVtxByPtr	(	CvGraph *	graph,
		CvGraphVtx *	vtx
	)

§ cvGraphVtxDegree()

int cvGraphVtxDegree	(	const CvGraph *	graph,
		int	vtx_idx
	)

Count number of edges incident to the vertex

§ cvGraphVtxDegreeByPtr()

int cvGraphVtxDegreeByPtr	(	const CvGraph *	graph,
		const CvGraphVtx *	vtx
	)

§ cvGuiBoxReport()

int cvGuiBoxReport	(	int	status,
		const char *	func_name,
		const char *	err_msg,
		const char *	file_name,
		int	line,
		void *	userdata
	)

Output to MessageBox(WIN32)

§ cvIncRefData()

int cvIncRefData ( CvArr * arr )

Increments array data reference counter.

The function increments CvMat or CvMatND data reference counter and returns the new counter value if the reference counter pointer is not NULL, otherwise it returns zero.

Parameters

arr	Array header

§ cvInitImageHeader()

IplImage* cvInitImageHeader	(	IplImage *	image,
		CvSize	size,
		int	depth,
		int	channels,
		int	origin = `0`,
		int	align = `4`
	)

Initializes an image header that was previously allocated.

The returned IplImage* points to the initialized header.

Parameters

image	Image header to initialize
size	Image width and height
depth	Image depth (see cvCreateImage )
channels	Number of channels (see cvCreateImage )
origin	Top-left IPL_ORIGIN_TL or bottom-left IPL_ORIGIN_BL
align	Alignment for image rows, typically 4 or 8 bytes

§ cvInitMatHeader()

CvMat* cvInitMatHeader	(	CvMat *	mat,
		int	rows,
		int	cols,
		int	type,
		void *	data = `NULL`,
		int	step = `0x7fffffff`
	)

Initializes a pre-allocated matrix header.

This function is often used to process raw data with OpenCV matrix functions. For example, the following code computes the matrix product of two matrices, stored as ordinary arrays:

double a[] = { 1, 2, 3, 4,
               5, 6, 7, 8,
               9, 10, 11, 12 };
double b[] = { 1, 5, 9,
               2, 6, 10,
               3, 7, 11,
               4, 8, 12 };
double c[9];
CvMat Ma, Mb, Mc ;
cvInitMatHeader(&Ma, 3, 4, CV_64FC1, a);
cvInitMatHeader(&Mb, 4, 3, CV_64FC1, b);
cvInitMatHeader(&Mc, 3, 3, CV_64FC1, c);
cvMatMulAdd(&Ma, &Mb, 0, &Mc);
// the c array now contains the product of a (3x4) and b (4x3)

Parameters

mat	A pointer to the matrix header to be initialized
rows	Number of rows in the matrix
cols	Number of columns in the matrix
type	Type of the matrix elements, see cvCreateMat .
data	Optional: data pointer assigned to the matrix header
step	Optional: full row width in bytes of the assigned data. By default, the minimal possible step is used which assumes there are no gaps between subsequent rows of the matrix.

§ cvInitMatNDHeader()

CvMatND* cvInitMatNDHeader	(	CvMatND *	mat,
		int	dims,
		const int *	sizes,
		int	type,
		void *	data = `NULL`
	)

Initializes a pre-allocated multi-dimensional array header.

Parameters

mat	A pointer to the array header to be initialized
dims	The number of array dimensions
sizes	An array of dimension sizes
type	Type of array elements, see cvCreateMat
data	Optional data pointer assigned to the matrix header

§ cvInitNArrayIterator()

int cvInitNArrayIterator	(	int	count,
		CvArr **	arrs,
		const CvArr *	mask,
		CvMatND *	stubs,
		CvNArrayIterator *	array_iterator,
		int	flags = `0`
	)

initializes iterator that traverses through several arrays simulteneously (the function together with cvNextArraySlice is used for N-ari element-wise operations)

§ cvInitSparseMatIterator()

CvSparseNode* cvInitSparseMatIterator	(	const CvSparseMat *	mat,
		CvSparseMatIterator *	mat_iterator
	)

Initializes sparse array elements iterator.

The function initializes iterator of sparse array elements and returns pointer to the first element, or NULL if the array is empty.

Parameters

mat	Input array
mat_iterator	Initialized iterator

§ cvInitTreeNodeIterator()

void cvInitTreeNodeIterator	(	CvTreeNodeIterator *	tree_iterator,
		const void *	first,
		int	max_level
	)

§ cvInRange()

void cvInRange	(	const CvArr *	src,
		const CvArr *	lower,
		const CvArr *	upper,
		CvArr *	dst
	)

dst(idx) = lower(idx) <= src(idx) < upper(idx)

§ cvInRangeS()

void cvInRangeS	(	const CvArr *	src,
		CvScalar	lower,
		CvScalar	upper,
		CvArr *	dst
	)

dst(idx) = lower <= src(idx) < upper

§ cvInsertNodeIntoTree()

void cvInsertNodeIntoTree	(	void *	node,
		void *	parent,
		void *	frame
	)

Inserts sequence into tree with specified "parent" sequence. If parent is equal to frame (e.g. the most external contour), then added contour will have null pointer to parent.

§ cvInvert()

double cvInvert	(	const CvArr *	src,
		CvArr *	dst,
		int	method = `0`
	)

Inverts matrix

§ cvIplDepth()

int cvIplDepth ( int type )

§ cvKMeans2()

int cvKMeans2	(	const CvArr *	samples,
		int	cluster_count,
		CvArr *	labels,
		CvTermCriteria	termcrit,
		int	attempts = `1`,
		CvRNG *	rng = `0`,
		int	flags = `0`,
		CvArr *	_centers = `0`,
		double *	compactness = `0`
	)

§ cvLoad()

void* cvLoad	(	const char *	filename,
		CvMemStorage *	memstorage = `NULL`,
		const char *	name = `NULL`,
		const char **	real_name = `NULL`
	)

Loads an object from a file.

The function loads an object from a file. It basically reads the specified file, find the first top-level node and calls cvRead for that node. If the file node does not have type information or the type information can not be found by the type name, the function returns NULL. After the object is loaded, the file storage is closed and all the temporary buffers are deleted. Thus, to load a dynamic structure, such as a sequence, contour, or graph, one should pass a valid memory storage destination to the function.

Parameters

filename	File name
memstorage	Memory storage for dynamic structures, such as CvSeq or CvGraph . It is not used for matrices or images.
name	Optional object name. If it is NULL, the first top-level object in the storage will be loaded.
real_name	Optional output parameter that will contain the name of the loaded object (useful if name=NULL )

§ cvLog()

void cvLog	(	const CvArr *	src,
		CvArr *	dst
	)

Calculates natural logarithms: dst(idx) = log(abs(src(idx))). Logarithm of 0 gives large negative number(~-700) Maximal relative error is ~3e-7 for single-precision output

§ cvLUT()

void cvLUT	(	const CvArr *	src,
		CvArr *	dst,
		const CvArr *	lut
	)

Does look-up transformation. Elements of the source array (that should be 8uC1 or 8sC1) are used as indexes in lutarr 256-element table

§ cvMahalanobis()

double cvMahalanobis	(	const CvArr *	vec1,
		const CvArr *	vec2,
		const CvArr *	mat
	)

Calculates Mahalanobis(weighted) distance

§ cvMakeSeqHeaderForArray()

CvSeq* cvMakeSeqHeaderForArray	(	int	seq_type,
		int	header_size,
		int	elem_size,
		void *	elements,
		int	total,
		CvSeq *	seq,
		CvSeqBlock *	block
	)

Creates sequence header for array. After that all the operations on sequences that do not alter the content can be applied to the resultant sequence

§ cvMat()

CvMat cvMat	(	int	rows,
		int	cols,
		int	type,
		void *	data = `NULL`
	)

Inline constructor. No data is allocated internally!!! (Use together with cvCreateData, or use cvCreateMat instead to get a matrix with allocated data):

§ cvMax()

void cvMax	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst
	)

dst(idx) = max(src1(idx),src2(idx))

§ cvMaxS()

void cvMaxS	(	const CvArr *	src,
		double	value,
		CvArr *	dst
	)

dst(idx) = max(src(idx),value)

§ cvMemStorageAlloc()

void* cvMemStorageAlloc	(	CvMemStorage *	storage,
		size_t	size
	)

Allocates continuous buffer of the specified size in the storage

§ cvMemStorageAllocString()

CvString cvMemStorageAllocString	(	CvMemStorage *	storage,
		const char *	ptr,
		int	len = `-1`
	)

Allocates string in memory storage

§ cvMerge()

void cvMerge	(	const CvArr *	src0,
		const CvArr *	src1,
		const CvArr *	src2,
		const CvArr *	src3,
		CvArr *	dst
	)

Merges a set of single-channel arrays into the single multi-channel array or inserts one particular [color] plane to the array

§ cvmGet()

double cvmGet	(	const CvMat *	mat,
		int	row,
		int	col
	)

Returns the particular element of single-channel floating-point matrix.

The function is a fast replacement for cvGetReal2D in the case of single-channel floating-point matrices. It is faster because it is inline, it does fewer checks for array type and array element type, and it checks for the row and column ranges only in debug mode.

Parameters

mat	Input matrix
row	The zero-based index of row
col	The zero-based index of column

§ cvMin()

void cvMin	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst
	)

dst(idx) = min(src1(idx),src2(idx))

§ cvMinMaxLoc()

void cvMinMaxLoc	(	const CvArr *	arr,
		double *	min_val,
		double *	max_val,
		CvPoint *	min_loc = `NULL`,
		CvPoint *	max_loc = `NULL`,
		const CvArr *	mask = `NULL`
	)

Finds global minimum, maximum and their positions

§ cvMinS()

void cvMinS	(	const CvArr *	src,
		double	value,
		CvArr *	dst
	)

dst(idx) = min(src(idx),value)

§ cvMixChannels()

void cvMixChannels	(	const CvArr **	src,
		int	src_count,
		CvArr **	dst,
		int	dst_count,
		const int *	from_to,
		int	pair_count
	)

Copies several channels from input arrays to certain channels of output arrays

§ cvmSet()

void cvmSet	(	CvMat *	mat,
		int	row,
		int	col,
		double	value
	)

Sets a specific element of a single-channel floating-point matrix.

The function is a fast replacement for cvSetReal2D in the case of single-channel floating-point matrices. It is faster because it is inline, it does fewer checks for array type and array element type, and it checks for the row and column ranges only in debug mode.

Parameters

mat	The matrix
row	The zero-based index of row
col	The zero-based index of column
value	The new value of the matrix element

§ cvMul()

void cvMul	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		double	scale = `1`
	)

dst(idx) = src1(idx) * src2(idx) * scale (scaled element-wise multiplication of 2 arrays)

§ cvMulSpectrums()

void cvMulSpectrums	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		int	flags
	)

Multiply results of DFTs: DFT(X)*DFT(Y) or DFT(X)*conj(DFT(Y))

See also: core_c_DftFlags "flags"

§ cvMulTransposed()

void cvMulTransposed	(	const CvArr *	src,
		CvArr *	dst,
		int	order,
		const CvArr *	delta = `NULL`,
		double	scale = `1.`
	)

Calculates (A-delta)*(A-delta)^T (order=0) or (A-delta)^T*(A-delta) (order=1)

§ cvNextGraphItem()

int cvNextGraphItem ( CvGraphScanner * scanner )

Get next graph element

§ cvNextNArraySlice()

int cvNextNArraySlice ( CvNArrayIterator * array_iterator )

returns zero value if iteration is finished, non-zero (slice length) otherwise

§ cvNextTreeNode()

void* cvNextTreeNode ( CvTreeNodeIterator * tree_iterator )

§ cvNorm()

double cvNorm	(	const CvArr *	arr1,
		const CvArr *	arr2 = `NULL`,
		int	norm_type = `4`,
		const CvArr *	mask = `NULL`
	)

Finds norm, difference norm or relative difference norm for an array (or two arrays)

See also: ref core_c_NormFlags "flags"

§ cvNormalize()

void cvNormalize	(	const CvArr *	src,
		CvArr *	dst,
		double	a = `1.`,
		double	b = `0.`,
		int	norm_type = `4`,
		const CvArr *	mask = `NULL`
	)

See also: ref core_c_NormFlags "flags"

§ cvNot()

void cvNot	(	const CvArr *	src,
		CvArr *	dst
	)

dst(idx) = ~src(idx)

§ cvNulDevReport()

int cvNulDevReport	(	int	status,
		const char *	func_name,
		const char *	err_msg,
		const char *	file_name,
		int	line,
		void *	userdata
	)

Output nothing

§ cvOpenFileStorage()

CvFileStorage* cvOpenFileStorage	(	const char *	filename,
		CvMemStorage *	memstorage,
		int	flags,
		const char *	encoding = `NULL`
	)

Opens file storage for reading or writing data.

The function opens file storage for reading or writing data. In the latter case, a new file is created or an existing file is rewritten. The type of the read or written file is determined by the filename extension: .xml for XML, .yml or .yaml for YAML and .json for JSON.

At the same time, it also supports adding parameters like "example.xml?base64". The three ways are the same:

fs = cvOpenFileStorage( "example.yml?base64", 0, CV_STORAGE_WRITE );

fs = cvOpenFileStorage( "example.yml" , 0, CV_STORAGE_WRITE_BASE64 );

fs = cvOpenFileStorage( "example.yml" , 0, CV_STORAGE_WRITE | CV_STORAGE_BASE64 );

The function returns a pointer to the CvFileStorage structure. If the file cannot be opened then the function returns NULL.

Parameters

filename	Name of the file associated with the storage
memstorage	Memory storage used for temporary data and for : storing dynamic structures, such as CvSeq or CvGraph . If it is NULL, a temporary memory storage is created and used.
flags	Can be one of the following: CV_STORAGE_READ the storage is open for reading CV_STORAGE_WRITE the storage is open for writing (use CV_STORAGE_WRITE \| CV_STORAGE_WRITE_BASE64 to write rawdata in Base64)
encoding

§ cvOr()

void cvOr	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src1(idx) | src2(idx)

§ cvOrS()

void cvOrS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src(idx) | value

§ cvPerspectiveTransform()

void cvPerspectiveTransform	(	const CvArr *	src,
		CvArr *	dst,
		const CvMat *	mat
	)

Does perspective transform on every element of input array

§ cvPoint()

CvPoint cvPoint	(	int	x,
		int	y
	)

constructs CvPoint structure.

§ cvPoint2D32f()

CvPoint2D32f cvPoint2D32f	(	double	x,
		double	y
	)

constructs CvPoint2D32f structure.

§ cvPoint2D64f()

CvPoint2D64f cvPoint2D64f	(	double	x,
		double	y
	)

constructs CvPoint2D64f structure.

§ cvPoint3D32f()

CvPoint3D32f cvPoint3D32f	(	double	x,
		double	y,
		double	z
	)

constructs CvPoint3D32f structure.

§ cvPoint3D64f()

CvPoint3D64f cvPoint3D64f	(	double	x,
		double	y,
		double	z
	)

constructs CvPoint3D64f structure.

§ cvPointFrom32f()

CvPoint cvPointFrom32f ( CvPoint2D32f point )

converts CvPoint2D32f to CvPoint.

§ cvPointTo32f()

CvPoint2D32f cvPointTo32f ( CvPoint point )

converts CvPoint to CvPoint2D32f.

§ cvPolarToCart()

void cvPolarToCart	(	const CvArr *	magnitude,
		const CvArr *	angle,
		CvArr *	x,
		CvArr *	y,
		int	angle_in_degrees = `0`
	)

Does polar->cartesian coordinates conversion. Either of output components (magnitude or angle) is optional. If magnitude is missing it is assumed to be all 1's

§ cvPow()

void cvPow	(	const CvArr *	src,
		CvArr *	dst,
		double	power
	)

Does powering: dst(idx) = src(idx)^power

§ cvPrevTreeNode()

void* cvPrevTreeNode ( CvTreeNodeIterator * tree_iterator )

§ cvProjectPCA()

void cvProjectPCA	(	const CvArr *	data,
		const CvArr *	mean,
		const CvArr *	eigenvects,
		CvArr *	result
	)

§ cvPtr1D()

uchar* cvPtr1D	(	const CvArr *	arr,
		int	idx0,
		int *	type = `NULL`
	)

Return pointer to a particular array element.

The functions return a pointer to a specific array element. Number of array dimension should match to the number of indices passed to the function except for cvPtr1D function that can be used for sequential access to 1D, 2D or nD dense arrays.

The functions can be used for sparse arrays as well - if the requested node does not exist they create it and set it to zero.

All these as well as other functions accessing array elements ( cvGetND , cvGetRealND , cvSet , cvSetND , cvSetRealND ) raise an error in case if the element index is out of range.

Parameters

arr	Input array
idx0	The first zero-based component of the element index
type	Optional output parameter: type of matrix elements

§ cvPtr2D()

uchar* cvPtr2D	(	const CvArr *	arr,
		int	idx0,
		int	idx1,
		int *	type = `NULL`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvPtr3D()

uchar* cvPtr3D	(	const CvArr *	arr,
		int	idx0,
		int	idx1,
		int	idx2,
		int *	type = `NULL`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvPtrND()

uchar* cvPtrND	(	const CvArr *	arr,
		const int *	idx,
		int *	type = `NULL`,
		int	create_node = `1`,
		unsigned *	precalc_hashval = `NULL`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
idx	Array of the element indices
type	Optional output parameter: type of matrix elements
create_node	Optional input parameter for sparse matrices. Non-zero value of the parameter means that the requested element is created if it does not exist already.
precalc_hashval	Optional input parameter for sparse matrices. If the pointer is not NULL, the function does not recalculate the node hash value, but takes it from the specified location. It is useful for speeding up pair-wise operations (TODO: provide an example)

§ cvRandArr()

void cvRandArr	(	CvRNG *	rng,
		CvArr *	arr,
		int	dist_type,
		CvScalar	param1,
		CvScalar	param2
	)

Fills an array with random numbers and updates the RNG state.

The function fills the destination array with uniformly or normally distributed random numbers.

Parameters

rng	CvRNG state initialized by cvRNG
arr	The destination array
dist_type	Distribution type CV_RAND_UNI uniform distribution CV_RAND_NORMAL normal or Gaussian distribution
param1	The first parameter of the distribution. In the case of a uniform distribution it is the inclusive lower boundary of the random numbers range. In the case of a normal distribution it is the mean value of the random numbers.
param2	The second parameter of the distribution. In the case of a uniform distribution it is the exclusive upper boundary of the random numbers range. In the case of a normal distribution it is the standard deviation of the random numbers.

See also: randu, randn, RNG::fill.

§ cvRandInt()

unsigned cvRandInt ( CvRNG * rng )

Returns a 32-bit unsigned integer and updates RNG.

The function returns a uniformly-distributed random 32-bit unsigned integer and updates the RNG state. It is similar to the rand() function from the C runtime library, except that OpenCV functions always generates a 32-bit random number, regardless of the platform.

Parameters

rng	CvRNG state initialized by cvRNG.

§ cvRandReal()

double cvRandReal ( CvRNG * rng )

Returns a floating-point random number and updates RNG.

The function returns a uniformly-distributed random floating-point number between 0 and 1 (1 is not included).

Parameters

rng	RNG state initialized by cvRNG

§ cvRandShuffle()

void cvRandShuffle	(	CvArr *	mat,
		CvRNG *	rng,
		double	iter_factor = `1.`
	)

§ cvRange()

CvArr* cvRange	(	CvArr *	mat,
		double	start,
		double	end
	)

Fills matrix with given range of numbers

§ cvRawDataToScalar()

void cvRawDataToScalar	(	const void *	data,
		int	type,
		CvScalar *	scalar
	)

§ cvRead()

void* cvRead	(	CvFileStorage *	fs,
		CvFileNode *	node,
		CvAttrList *	attributes = `NULL`
	)

Decodes an object and returns a pointer to it.

The function decodes a user object (creates an object in a native representation from the file storage subtree) and returns it. The object to be decoded must be an instance of a registered type that supports the read method (see CvTypeInfo). The type of the object is determined by the type name that is encoded in the file. If the object is a dynamic structure, it is created either in memory storage and passed to cvOpenFileStorage or, if a NULL pointer was passed, in temporary memory storage, which is released when cvReleaseFileStorage is called. Otherwise, if the object is not a dynamic structure, it is created in a heap and should be released with a specialized function or by using the generic cvRelease.

Parameters

fs	File storage
node	The root object node
attributes	Unused parameter

§ cvReadByName()

void* cvReadByName	(	CvFileStorage *	fs,
		const CvFileNode *	map,
		const char *	name,
		CvAttrList *	attributes = `NULL`
	)

Finds an object by name and decodes it.

The function is a simple superposition of cvGetFileNodeByName and cvRead.

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches a top-level node.
name	The node name
attributes	Unused parameter

§ cvReadInt()

int cvReadInt	(	const CvFileNode *	node,
		int	default_value = `0`
	)

Retrieves an integer value from a file node.

The function returns an integer that is represented by the file node. If the file node is NULL, the default_value is returned (thus, it is convenient to call the function right after cvGetFileNode without checking for a NULL pointer). If the file node has type CV_NODE_INT, then node->data.i is returned. If the file node has type CV_NODE_REAL, then node->data.f is converted to an integer and returned. Otherwise the error is reported.

Parameters

node	File node
default_value	The value that is returned if node is NULL

§ cvReadIntByName()

int cvReadIntByName	(	const CvFileStorage *	fs,
		const CvFileNode *	map,
		const char *	name,
		int	default_value = `0`
	)

Finds a file node and returns its value.

The function is a simple superposition of cvGetFileNodeByName and cvReadInt.

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches a top-level node.
name	The node name
default_value	The value that is returned if the file node is not found

§ cvReadRawData()

void cvReadRawData	(	const CvFileStorage *	fs,
		const CvFileNode *	src,
		void *	dst,
		const char *	dt
	)

Reads multiple numbers.

The function reads elements from a file node that represents a sequence of scalars.

Parameters

fs	File storage
src	The file node (a sequence) to read numbers from
dst	Pointer to the destination array
dt	Specification of each array element. It has the same format as in cvWriteRawData .

§ cvReadRawDataSlice()

void cvReadRawDataSlice	(	const CvFileStorage *	fs,
		CvSeqReader *	reader,
		int	count,
		void *	dst,
		const char *	dt
	)

Initializes file node sequence reader.

The function reads one or more elements from the file node, representing a sequence, to a user-specified array. The total number of read sequence elements is a product of total and the number of components in each array element. For example, if dt=2if, the function will read total*3 sequence elements. As with any sequence, some parts of the file node sequence can be skipped or read repeatedly by repositioning the reader using cvSetSeqReaderPos.

Parameters

fs	File storage
reader	The sequence reader. Initialize it with cvStartReadRawData .
count	The number of elements to read
dst	Pointer to the destination array
dt	Specification of each array element. It has the same format as in cvWriteRawData .

§ cvReadReal()

double cvReadReal	(	const CvFileNode *	node,
		double	default_value = `0.`
	)

Retrieves a floating-point value from a file node.

The function returns a floating-point value that is represented by the file node. If the file node is NULL, the default_value is returned (thus, it is convenient to call the function right after cvGetFileNode without checking for a NULL pointer). If the file node has type CV_NODE_REAL , then node->data.f is returned. If the file node has type CV_NODE_INT , then node-:math:>data.f is converted to floating-point and returned. Otherwise the result is not determined.

Parameters

node	File node
default_value	The value that is returned if node is NULL

§ cvReadRealByName()

double cvReadRealByName	(	const CvFileStorage *	fs,
		const CvFileNode *	map,
		const char *	name,
		double	default_value = `0.`
	)

Finds a file node and returns its value.

The function is a simple superposition of cvGetFileNodeByName and cvReadReal .

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches a top-level node.
name	The node name
default_value	The value that is returned if the file node is not found

§ cvReadString()

const char* cvReadString	(	const CvFileNode *	node,
		const char *	default_value = `NULL`
	)

Retrieves a text string from a file node.

The function returns a text string that is represented by the file node. If the file node is NULL, the default_value is returned (thus, it is convenient to call the function right after cvGetFileNode without checking for a NULL pointer). If the file node has type CV_NODE_STR , then node-:math:>data.str.ptr is returned. Otherwise the result is not determined.

Parameters

node	File node
default_value	The value that is returned if node is NULL

§ cvReadStringByName()

const char* cvReadStringByName	(	const CvFileStorage *	fs,
		const CvFileNode *	map,
		const char *	name,
		const char *	default_value = `NULL`
	)

Finds a file node by its name and returns its value.

The function is a simple superposition of cvGetFileNodeByName and cvReadString .

Parameters

fs	File storage
map	The parent map. If it is NULL, the function searches a top-level node.
name	The node name
default_value	The value that is returned if the file node is not found

§ cvRealScalar()

CvScalar cvRealScalar ( double val0 )

§ cvRect()

CvRect cvRect	(	int	x,
		int	y,
		int	width,
		int	height
	)

constructs CvRect structure.

§ cvRectToROI()

IplROI cvRectToROI	(	CvRect	rect,
		int	coi
	)

§ cvRedirectError()

CvErrorCallback cvRedirectError	(	CvErrorCallback	error_handler,
		void *	userdata = `NULL`,
		void **	prev_userdata = `NULL`
	)

Assigns a new error-handling function

§ cvReduce()

void cvReduce	(	const CvArr *	src,
		CvArr *	dst,
		int	dim = `-1`,
		int	op = `0`
	)

See also: flags

§ cvRegisterType()

void cvRegisterType ( const CvTypeInfo * info )

Registers a new type.

The function registers a new type, which is described by info . The function creates a copy of the structure, so the user should delete it after calling the function.

Parameters

info	Type info structure

§ cvRelease()

void cvRelease ( void ** struct_ptr )

Releases an object.

The function finds the type of a given object and calls release with the double pointer.

Parameters

struct_ptr Double pointer to the object

§ cvReleaseData()

void cvReleaseData ( CvArr * arr )

Releases array data.

The function releases the array data. In the case of CvMat or CvMatND it simply calls cvDecRefData(), that is the function can not deallocate external data. See also the note to cvCreateData .

Parameters

arr	Array header

§ cvReleaseFileStorage()

void cvReleaseFileStorage ( CvFileStorage ** fs )

Releases file storage.

The function closes the file associated with the storage and releases all the temporary structures. It must be called after all I/O operations with the storage are finished.

Parameters

fs	Double pointer to the released file storage

§ cvReleaseGraphScanner()

void cvReleaseGraphScanner ( CvGraphScanner ** scanner )

Releases graph scanner.

§ cvReleaseImage()

void cvReleaseImage ( IplImage ** image )

Deallocates the image header and the image data.

This call is a shortened form of :

if(*image )
{
    cvReleaseData(*image);
    cvReleaseImageHeader(image);
}

Parameters

image Double pointer to the image header

§ cvReleaseImageHeader()

void cvReleaseImageHeader ( IplImage ** image )

Deallocates an image header.

This call is an analogue of :

if(image )
{
    iplDeallocate(*image, IPL_IMAGE_HEADER | IPL_IMAGE_ROI);
    *image = 0;
}

but it does not use IPL functions by default (see the CV_TURN_ON_IPL_COMPATIBILITY macro).

Parameters

image Double pointer to the image header

§ cvReleaseMat()

void cvReleaseMat ( CvMat ** mat )

Deallocates a matrix.

The function decrements the matrix data reference counter and deallocates matrix header. If the data reference counter is 0, it also deallocates the data. :

if(*mat )
    cvDecRefData(*mat);
cvFree((void**)mat);

Parameters

mat	Double pointer to the matrix

§ cvReleaseMatND()

void cvReleaseMatND ( CvMatND ** mat )

Deallocates a multi-dimensional array.

The function decrements the array data reference counter and releases the array header. If the reference counter reaches 0, it also deallocates the data. :

if(*mat )
    cvDecRefData(*mat);
cvFree((void**)mat);

Parameters

mat	Double pointer to the array

§ cvReleaseMemStorage()

void cvReleaseMemStorage ( CvMemStorage ** storage )

Releases memory storage. All the children of a parent must be released before the parent. A child storage returns all the blocks to parent when it is released

§ cvReleaseSparseMat()

void cvReleaseSparseMat ( CvSparseMat ** mat )

Deallocates sparse array.

The function releases the sparse array and clears the array pointer upon exit.

Parameters

mat	Double pointer to the array

§ cvRemoveNodeFromTree()

void cvRemoveNodeFromTree	(	void *	node,
		void *	frame
	)

Removes contour from tree (together with the contour children).

§ cvRepeat()

void cvRepeat	(	const CvArr *	src,
		CvArr *	dst
	)

Repeats source 2d array several times in both horizontal and vertical direction to fill destination array

§ cvResetImageROI()

void cvResetImageROI ( IplImage * image )

Resets the image ROI to include the entire image and releases the ROI structure.

This produces a similar result to the following, but in addition it releases the ROI structure. :

cvSetImageROI(image, cvRect(0, 0, image->width, image->height ));

cvSetImageCOI(image, 0);

Parameters

image A pointer to the image header

§ cvReshape()

CvMat* cvReshape	(	const CvArr *	arr,
		CvMat *	header,
		int	new_cn,
		int	new_rows = `0`
	)

Changes shape of matrix/image without copying data.

The function initializes the CvMat header so that it points to the same data as the original array but has a different shape - different number of channels, different number of rows, or both.

The following example code creates one image buffer and two image headers, the first is for a 320x240x3 image and the second is for a 960x240x1 image:

IplImage* color_img = cvCreateImage(cvSize(320,240), IPL_DEPTH_8U, 3);
CvMat gray_mat_hdr;
IplImage gray_img_hdr, *gray_img;
cvReshape(color_img, &gray_mat_hdr, 1);
gray_img = cvGetImage(&gray_mat_hdr, &gray_img_hdr);

And the next example converts a 3x3 matrix to a single 1x9 vector:

CvMat* mat = cvCreateMat(3, 3, CV_32F);
CvMat row_header, *row;
row = cvReshape(mat, &row_header, 0, 1);

Parameters

arr	Input array
header	Output header to be filled
new_cn	New number of channels. 'new_cn = 0' means that the number of channels remains unchanged.
new_rows	New number of rows. 'new_rows = 0' means that the number of rows remains unchanged unless it needs to be changed according to new_cn value.

§ cvReshapeMatND()

CvArr* cvReshapeMatND	(	const CvArr *	arr,
		int	sizeof_header,
		CvArr *	header,
		int	new_cn,
		int	new_dims,
		int *	new_sizes
	)

Changes the shape of a multi-dimensional array without copying the data.

The function is an advanced version of cvReshape that can work with multi-dimensional arrays as well (though it can work with ordinary images and matrices) and change the number of dimensions.

Below are the two samples from the cvReshape description rewritten using cvReshapeMatND:

IplImage* color_img = cvCreateImage(cvSize(320,240), IPL_DEPTH_8U, 3);
IplImage gray_img_hdr, *gray_img;
gray_img = (IplImage*)cvReshapeMatND(color_img, sizeof(gray_img_hdr), &gray_img_hdr, 1, 0, 0);
...
int size[] = { 2, 2, 2 };
CvMatND* mat = cvCreateMatND(3, size, CV_32F);
CvMat row_header, *row;
row = (CvMat*)cvReshapeMatND(mat, sizeof(row_header), &row_header, 0, 1, 0);

In C, the header file for this function includes a convenient macro cvReshapeND that does away with the sizeof_header parameter. So, the lines containing the call to cvReshapeMatND in the examples may be replaced as follow:

gray_img = (IplImage*)cvReshapeND(color_img, &gray_img_hdr, 1, 0, 0);
...
row = (CvMat*)cvReshapeND(mat, &row_header, 0, 1, 0);

Parameters

arr	Input array
sizeof_header	Size of output header to distinguish between IplImage, CvMat and CvMatND output headers
header	Output header to be filled
new_cn	New number of channels. new_cn = 0 means that the number of channels remains unchanged.
new_dims	New number of dimensions. new_dims = 0 means that the number of dimensions remains the same.
new_sizes	Array of new dimension sizes. Only new_dims-1 values are used, because the total number of elements must remain the same. Thus, if new_dims = 1, new_sizes array is not used.

§ cvRestoreMemStoragePos()

void cvRestoreMemStoragePos	(	CvMemStorage *	storage,
		CvMemStoragePos *	pos
	)

Restore a storage "free memory" position

§ cvRNG()

CvRNG cvRNG ( int64 seed = -1 )

Initializes a random number generator state.

The function initializes a random number generator and returns the state. The pointer to the state can be then passed to the cvRandInt, cvRandReal and cvRandArr functions. In the current implementation a multiply-with-carry generator is used.

Parameters

seed	64-bit value used to initiate a random sequence

See also: the C++ class RNG replaced CvRNG.

§ cvROIToRect()

CvRect cvROIToRect ( IplROI roi )

§ cvSave()

void cvSave	(	const char *	filename,
		const void *	struct_ptr,
		const char *	name = `NULL`,
		const char *	comment = `NULL`,
		CvAttrList	attributes = `cvAttrList()`
	)

Saves an object to a file.

The function saves an object to a file. It provides a simple interface to cvWrite .

Parameters

filename	File name
struct_ptr	Object to save
name	Optional object name. If it is NULL, the name will be formed from filename .
comment	Optional comment to put in the beginning of the file
attributes	Optional attributes passed to cvWrite

§ cvSaveMemStoragePos()

void cvSaveMemStoragePos	(	const CvMemStorage *	storage,
		CvMemStoragePos *	pos
	)

Remember a storage "free memory" position

§ cvScalar()

CvScalar cvScalar	(	double	val0,
		double	val1 = `0`,
		double	val2 = `0`,
		double	val3 = `0`
	)

§ cvScalarAll()

CvScalar cvScalarAll ( double val0123 )

§ cvScalarToRawData()

void cvScalarToRawData	(	const CvScalar *	scalar,
		void *	data,
		int	type,
		int	extend_to_12 = `0`
	)

low-level scalar <-> raw data conversion functions

§ cvScaleAdd()

void cvScaleAdd	(	const CvArr *	src1,
		CvScalar	scale,
		const CvArr *	src2,
		CvArr *	dst
	)

dst = src1 * scale + src2

§ cvSeqElemIdx()

int cvSeqElemIdx	(	const CvSeq *	seq,
		const void *	element,
		CvSeqBlock **	block = `NULL`
	)

Calculates index of the specified sequence element. Returns -1 if element does not belong to the sequence

§ cvSeqInsert()

schar* cvSeqInsert	(	CvSeq *	seq,
		int	before_index,
		const void *	element = `NULL`
	)

Inserts a new element in the middle of sequence. cvSeqInsert(seq,0,elem) == cvSeqPushFront(seq,elem)

§ cvSeqInsertSlice()

void cvSeqInsertSlice	(	CvSeq *	seq,
		int	before_index,
		const CvArr *	from_arr
	)

Inserts a sequence or array into another sequence

§ cvSeqInvert()

void cvSeqInvert ( CvSeq * seq )

Reverses order of sequence elements in-place

§ cvSeqPartition()

int cvSeqPartition	(	const CvSeq *	seq,
		CvMemStorage *	storage,
		CvSeq **	labels,
		CvCmpFunc	is_equal,
		void *	userdata
	)

Splits sequence into one or more equivalence classes using the specified criteria

§ cvSeqPop()

void cvSeqPop	(	CvSeq *	seq,
		void *	element = `NULL`
	)

Removes the last element from sequence and optionally saves it

§ cvSeqPopFront()

void cvSeqPopFront	(	CvSeq *	seq,
		void *	element = `NULL`
	)

Removes the first element from sequence and optioanally saves it

§ cvSeqPopMulti()

void cvSeqPopMulti	(	CvSeq *	seq,
		void *	elements,
		int	count,
		int	in_front = `0`
	)

Removes several elements from the end of sequence and optionally saves them

§ cvSeqPush()

schar* cvSeqPush	(	CvSeq *	seq,
		const void *	element = `NULL`
	)

Adds new element to the end of sequence. Returns pointer to the element

§ cvSeqPushFront()

schar* cvSeqPushFront	(	CvSeq *	seq,
		const void *	element = `NULL`
	)

Adds new element to the beginning of sequence. Returns pointer to it

§ cvSeqPushMulti()

void cvSeqPushMulti	(	CvSeq *	seq,
		const void *	elements,
		int	count,
		int	in_front = `0`
	)

Adds several new elements to the end of sequence

§ cvSeqRemove()

void cvSeqRemove	(	CvSeq *	seq,
		int	index
	)

Removes specified sequence element

§ cvSeqRemoveSlice()

void cvSeqRemoveSlice	(	CvSeq *	seq,
		CvSlice	slice
	)

Removes sequence slice

§ cvSeqSearch()

schar* cvSeqSearch	(	CvSeq *	seq,
		const void *	elem,
		CvCmpFunc	func,
		int	is_sorted,
		int *	elem_idx,
		void *	userdata = `NULL`
	)

Finds element in a [sorted] sequence

§ cvSeqSlice()

CvSeq* cvSeqSlice	(	const CvSeq *	seq,
		CvSlice	slice,
		CvMemStorage *	storage = `NULL`,
		int	copy_data = `0`
	)

Extracts sequence slice (with or without copying sequence elements)

§ cvSeqSort()

void cvSeqSort	(	CvSeq *	seq,
		CvCmpFunc	func,
		void *	userdata = `NULL`
	)

Sorts sequence in-place given element comparison function

§ cvSet()

void cvSet	(	CvArr *	arr,
		CvScalar	value,
		const CvArr *	mask = `NULL`
	)

Sets every element of an array to a given value.

The function copies the scalar value to every selected element of the destination array:

\[\texttt{arr} (I)= \texttt{value} \quad \text{if} \quad \texttt{mask} (I) \ne 0\]

If array arr is of IplImage type, then is ROI used, but COI must not be set.

Parameters

arr	The destination array
value	Fill value
mask	Operation mask, 8-bit single channel array; specifies elements of the destination array to be changed

§ cvSet1D()

void cvSet1D	(	CvArr *	arr,
		int	idx0,
		CvScalar	value
	)

Change the particular array element.

The functions assign the new value to a particular array element. In the case of a sparse array the functions create the node if it does not exist yet.

Parameters

arr	Input array
idx0	The first zero-based component of the element index
value	The assigned value

§ cvSet2D()

void cvSet2D	(	CvArr *	arr,
		int	idx0,
		int	idx1,
		CvScalar	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvSet3D()

void cvSet3D	(	CvArr *	arr,
		int	idx0,
		int	idx1,
		int	idx2,
		CvScalar	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvSetAdd()

int cvSetAdd	(	CvSet *	set_header,
		CvSetElem *	elem = `NULL`,
		CvSetElem **	inserted_elem = `NULL`
	)

Adds new element to the set and returns pointer to it

§ cvSetData()

void cvSetData	(	CvArr *	arr,
		void *	data,
		int	step
	)

Assigns user data to the array header.

The function assigns user data to the array header. Header should be initialized before using cvCreateMatHeader, cvCreateImageHeader, cvCreateMatNDHeader, cvInitMatHeader, cvInitImageHeader or cvInitMatNDHeader.

Parameters

arr	Array header
data	User data
step	Full row length in bytes

§ cvSetErrMode()

int cvSetErrMode ( int mode )

Sets error processing mode, returns previously used mode

§ cvSetErrStatus()

void cvSetErrStatus ( int status )

Sets error status silently

§ cvSetIdentity()

void cvSetIdentity	(	CvArr *	mat,
		CvScalar	value = `cvRealScalar(1)`
	)

Finds selected eigen values and vectors of a symmetric matrix */ Makes an identity matrix (mat_ij = i == j)

§ cvSetImageCOI()

void cvSetImageCOI	(	IplImage *	image,
		int	coi
	)

Sets the channel of interest in an IplImage.

If the ROI is set to NULL and the coi is not 0, the ROI is allocated. Most OpenCV functions do not* support the COI setting, so to process an individual image/matrix channel one may copy (via cvCopy or cvSplit) the channel to a separate image/matrix, process it and then copy the result back (via cvCopy or cvMerge) if needed.

Parameters

image	A pointer to the image header
coi	The channel of interest. 0 - all channels are selected, 1 - first channel is selected, etc. Note that the channel indices become 1-based.

§ cvSetImageROI()

void cvSetImageROI	(	IplImage *	image,
		CvRect	rect
	)

Sets an image Region Of Interest (ROI) for a given rectangle.

If the original image ROI was NULL and the rect is not the whole image, the ROI structure is allocated.

Most OpenCV functions support the use of ROI and treat the image rectangle as a separate image. For example, all of the pixel coordinates are counted from the top-left (or bottom-left) corner of the ROI, not the original image.

Parameters

image	A pointer to the image header
rect	The ROI rectangle

§ cvSetIPLAllocators()

void cvSetIPLAllocators	(	Cv_iplCreateImageHeader	create_header,
		Cv_iplAllocateImageData	allocate_data,
		Cv_iplDeallocate	deallocate,
		Cv_iplCreateROI	create_roi,
		Cv_iplCloneImage	clone_image
	)

Makes OpenCV use IPL functions for allocating IplImage and IplROI structures.

Normally, the function is not called directly. Instead, a simple macro CV_TURN_ON_IPL_COMPATIBILITY() is used that calls cvSetIPLAllocators and passes there pointers to IPL allocation functions. :

...
CV_TURN_ON_IPL_COMPATIBILITY()
...

Parameters

create_header	pointer to a function, creating IPL image header.
allocate_data	pointer to a function, allocating IPL image data.
deallocate	pointer to a function, deallocating IPL image.
create_roi	pointer to a function, creating IPL image ROI (i.e. Region of Interest).
clone_image	pointer to a function, cloning an IPL image.

§ cvSetND()

void cvSetND	(	CvArr *	arr,
		const int *	idx,
		CvScalar	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
idx	Array of the element indices
value	The assigned value

§ cvSetNew()

CvSetElem* cvSetNew ( CvSet * set_header )

Fast variant of cvSetAdd

§ cvSetNumThreads()

void cvSetNumThreads ( int threads = 0 )

§ cvSetReal1D()

void cvSetReal1D	(	CvArr *	arr,
		int	idx0,
		double	value
	)

Change a specific array element.

The functions assign a new value to a specific element of a single-channel array. If the array has multiple channels, a runtime error is raised. Note that the Set*D function can be used safely for both single-channel and multiple-channel arrays, though they are a bit slower.

In the case of a sparse array the functions create the node if it does not yet exist.

Parameters

arr	Input array
idx0	The first zero-based component of the element index
value	The assigned value

§ cvSetReal2D()

void cvSetReal2D	(	CvArr *	arr,
		int	idx0,
		int	idx1,
		double	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvSetReal3D()

void cvSetReal3D	(	CvArr *	arr,
		int	idx0,
		int	idx1,
		int	idx2,
		double	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

§ cvSetRealND()

void cvSetRealND	(	CvArr *	arr,
		const int *	idx,
		double	value
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

arr	Input array
idx	Array of the element indices
value	The assigned value

§ cvSetRemove()

void cvSetRemove	(	CvSet *	set_header,
		int	index
	)

Removes element from the set by its index

§ cvSetRemoveByPtr()

void cvSetRemoveByPtr	(	CvSet *	set_header,
		void *	elem
	)

Removes set element given its pointer

§ cvSetSeqBlockSize()

void cvSetSeqBlockSize	(	CvSeq *	seq,
		int	delta_elems
	)

Changes default size (granularity) of sequence blocks. The default size is ~1Kbyte

§ cvSetSeqReaderPos()

void cvSetSeqReaderPos	(	CvSeqReader *	reader,
		int	index,
		int	is_relative = `0`
	)

Changes sequence reader position. It may seek to an absolute or to relative to the current position

§ cvSetZero()

void cvSetZero ( CvArr * arr )

Clears the array.

The function clears the array. In the case of dense arrays (CvMat, CvMatND or IplImage), cvZero(array) is equivalent to cvSet(array,cvScalarAll(0),0). In the case of sparse arrays all the elements are removed.

Parameters

arr	Array to be cleared

§ cvSize()

CvSize cvSize	(	int	width,
		int	height
	)

constructs CvSize structure.

§ cvSize2D32f()

CvSize2D32f cvSize2D32f	(	double	width,
		double	height
	)

constructs CvSize2D32f structure.

§ cvSlice()

CvSlice cvSlice	(	int	start,
		int	end
	)

§ cvSliceLength()

int cvSliceLength	(	CvSlice	slice,
		const CvSeq *	seq
	)

Calculates length of sequence slice (with support of negative indices).

§ cvSolve()

int cvSolve	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		int	method = `0`
	)

Solves linear system (src1)*(dst) = (src2) (returns 0 if src1 is a singular and CV_LU method is used)

§ cvSolveCubic()

int cvSolveCubic	(	const CvMat *	coeffs,
		CvMat *	roots
	)

Finds real roots of a cubic equation

§ cvSolvePoly()

void cvSolvePoly	(	const CvMat *	coeffs,
		CvMat *	roots2,
		int	maxiter = `20`,
		int	fig = `100`
	)

Finds all real and complex roots of a polynomial equation

§ cvSort()

void cvSort	(	const CvArr *	src,
		CvArr *	dst = `NULL`,
		CvArr *	idxmat = `NULL`,
		int	flags = `0`
	)

§ cvSplit()

void cvSplit	(	const CvArr *	src,
		CvArr *	dst0,
		CvArr *	dst1,
		CvArr *	dst2,
		CvArr *	dst3
	)

Splits a multi-channel array into the set of single-channel arrays or extracts particular [color] plane

§ cvStartAppendToSeq()

void cvStartAppendToSeq	(	CvSeq *	seq,
		CvSeqWriter *	writer
	)

Initializes sequence writer. The new elements will be added to the end of sequence

§ cvStartNextStream()

void cvStartNextStream ( CvFileStorage * fs )

Starts the next stream.

The function finishes the currently written stream and starts the next stream. In the case of XML the file with multiple streams looks like this:

<opencv_storage>
<!-- stream #1 data -->
</opencv_storage>
<opencv_storage>
<!-- stream #2 data -->
</opencv_storage>
...

The YAML file will look like this:

%YAML 1.0
# stream #1 data
...
---
# stream #2 data

This is useful for concatenating files or for resuming the writing process.

Parameters

fs	File storage

§ cvStartReadRawData()

void cvStartReadRawData	(	const CvFileStorage *	fs,
		const CvFileNode *	src,
		CvSeqReader *	reader
	)

Initializes the file node sequence reader.

The function initializes the sequence reader to read data from a file node. The initialized reader can be then passed to cvReadRawDataSlice.

Parameters

fs	File storage
src	The file node (a sequence) to read numbers from
reader	Pointer to the sequence reader

§ cvStartReadSeq()

void cvStartReadSeq	(	const CvSeq *	seq,
		CvSeqReader *	reader,
		int	reverse = `0`
	)

Initializes sequence reader. The sequence can be read in forward or backward direction

§ cvStartWriteSeq()

void cvStartWriteSeq	(	int	seq_flags,
		int	header_size,
		int	elem_size,
		CvMemStorage *	storage,
		CvSeqWriter *	writer
	)

Combination of cvCreateSeq and cvStartAppendToSeq

§ cvStartWriteStruct()

void cvStartWriteStruct	(	CvFileStorage *	fs,
		const char *	name,
		int	struct_flags,
		const char *	type_name = `NULL`,
		CvAttrList	attributes = `cvAttrList()`
	)

Starts writing a new structure.

The function starts writing a compound structure (collection) that can be a sequence or a map. After all the structure fields, which can be scalars or structures, are written, cvEndWriteStruct should be called. The function can be used to group some objects or to implement the write function for a some user object (see CvTypeInfo).

Parameters

fs	File storage
name	Name of the written structure. The structure can be accessed by this name when the storage is read.
struct_flags	A combination one of the following values: CV_NODE_SEQ the written structure is a sequence (see discussion of CvFileStorage ), that is, its elements do not have a name. CV_NODE_MAP the written structure is a map (see discussion of CvFileStorage ), that is, all its elements have names. One and only one of the two above flags must be specified CV_NODE_FLOW the optional flag that makes sense only for YAML streams. It means that the structure is written as a flow (not as a block), which is more compact. It is recommended to use this flag for structures or arrays whose elements are all scalars.
type_name	Optional parameter - the object type name. In case of XML it is written as a type_id attribute of the structure opening tag. In the case of YAML it is written after a colon following the structure name (see the example in CvFileStorage description). In case of JSON it is written as a name/value pair. Mainly it is used with user objects. When the storage is read, the encoded type name is used to determine the object type (see CvTypeInfo and cvFindType ).
attributes	This parameter is not used in the current implementation

§ cvStdErrReport()

int cvStdErrReport	(	int	status,
		const char *	func_name,
		const char *	err_msg,
		const char *	file_name,
		int	line,
		void *	userdata
	)

Output to console(fprintf(stderr,...))

§ cvSub()

void cvSub	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(mask) = src1(mask) - src2(mask)

§ cvSubRS()

void cvSubRS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(mask) = value - src(mask)

§ cvSubS()

void cvSubS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(mask) = src(mask) - value = src(mask) + (-value)

§ cvSum()

CvScalar cvSum ( const CvArr * arr )

Finds sum of array elements

§ cvSVBkSb()

void cvSVBkSb	(	const CvArr *	W,
		const CvArr *	U,
		const CvArr *	V,
		const CvArr *	B,
		CvArr *	X,
		int	flags
	)

Performs Singular Value Back Substitution (solves A*X = B): flags must be the same as in cvSVD

§ cvSVD()

void cvSVD	(	CvArr *	A,
		CvArr *	W,
		CvArr *	U = `NULL`,
		CvArr *	V = `NULL`,
		int	flags = `0`
	)

Performs Singular Value Decomposition of a matrix

§ cvTermCriteria()

CvTermCriteria cvTermCriteria	(	int	type,
		int	max_iter,
		double	epsilon
	)

§ cvTrace()

CvScalar cvTrace ( const CvArr * mat )

Calculates trace of the matrix (sum of elements on the main diagonal)

§ cvTransform()

void cvTransform	(	const CvArr *	src,
		CvArr *	dst,
		const CvMat *	transmat,
		const CvMat *	shiftvec = `NULL`
	)

Transforms each element of source array and stores resultant vectors in destination array

§ cvTranspose()

void cvTranspose	(	const CvArr *	src,
		CvArr *	dst
	)

Tranposes matrix. Square matrices can be transposed in-place

§ cvTreeToNodeSeq()

CvSeq* cvTreeToNodeSeq	(	const void *	first,
		int	header_size,
		CvMemStorage *	storage
	)

Gathers pointers to all the sequences, accessible from the first, to the single sequence

§ cvTypeOf()

CvTypeInfo* cvTypeOf ( const void * struct_ptr )

Returns the type of an object.

The function finds the type of a given object. It iterates through the list of registered types and calls the is_instance function/method for every type info structure with that object until one of them returns non-zero or until the whole list has been traversed. In the latter case, the function returns NULL.

Parameters

struct_ptr The object pointer

§ cvUnregisterType()

void cvUnregisterType ( const char * type_name )

Unregisters the type.

The function unregisters a type with a specified name. If the name is unknown, it is possible to locate the type info by an instance of the type using cvTypeOf or by iterating the type list, starting from cvFirstType, and then calling cvUnregisterType(info->typeName).

Parameters

type_name Name of an unregistered type

§ cvUseOptimized()

int cvUseOptimized ( int on_off )

Loads optimized functions from IPP, MKL etc. or switches back to pure C code

§ cvWrite()

void cvWrite	(	CvFileStorage *	fs,
		const char *	name,
		const void *	ptr,
		CvAttrList	attributes = `cvAttrList()`
	)

Writes an object to file storage.

The function writes an object to file storage. First, the appropriate type info is found using cvTypeOf. Then, the write method associated with the type info is called.

Attributes are used to customize the writing procedure. The standard types support the following attributes (all the dt attributes have the same format as in cvWriteRawData):

CvSeq
- header_dt description of user fields of the sequence header that follow CvSeq, or CvChain (if the sequence is a Freeman chain) or CvContour (if the sequence is a contour or point sequence)
- dt description of the sequence elements.
- recursive if the attribute is present and is not equal to "0" or "false", the whole tree of sequences (contours) is stored.
CvGraph
- header_dt description of user fields of the graph header that follows CvGraph;
- vertex_dt description of user fields of graph vertices
- edge_dt description of user fields of graph edges (note that the edge weight is always written, so there is no need to specify it explicitly)

Below is the code that creates the YAML file shown in the CvFileStorage description:

#include "cxcore.h"
int main( int argc, char** argv )
{
    CvMat* mat = cvCreateMat( 3, 3, CV_32F );
    CvFileStorage* fs = cvOpenFileStorage( "example.yml", 0, CV_STORAGE_WRITE );
    cvSetIdentity( mat );
    cvWrite( fs, "A", mat, cvAttrList(0,0) );
    cvReleaseFileStorage( &fs );
    cvReleaseMat( &mat );
    return 0;
}

Parameters

fs	File storage
name	Name of the written object. Should be NULL if and only if the parent structure is a sequence.
ptr	Pointer to the object
attributes	The attributes of the object. They are specific for each particular type (see the discussion below).

§ cvWriteComment()

void cvWriteComment	(	CvFileStorage *	fs,
		const char *	comment,
		int	eol_comment
	)

Writes a comment.

The function writes a comment into file storage. The comments are skipped when the storage is read.

Parameters

fs	File storage
comment	The written comment, single-line or multi-line
eol_comment	If non-zero, the function tries to put the comment at the end of current line. If the flag is zero, if the comment is multi-line, or if it does not fit at the end of the current line, the comment starts a new line.

§ cvWriteFileNode()

void cvWriteFileNode	(	CvFileStorage *	fs,
		const char *	new_node_name,
		const CvFileNode *	node,
		int	embed
	)

Writes a file node to another file storage.

The function writes a copy of a file node to file storage. Possible applications of the function are merging several file storages into one and conversion between XML, YAML and JSON formats.

Parameters

fs	Destination file storage
new_node_name	New name of the file node in the destination file storage. To keep the existing name, use cvcvGetFileNodeName
node	The written node
embed	If the written node is a collection and this parameter is not zero, no extra level of hierarchy is created. Instead, all the elements of node are written into the currently written structure. Of course, map elements can only be embedded into another map, and sequence elements can only be embedded into another sequence.

§ cvWriteInt()

void cvWriteInt	(	CvFileStorage *	fs,
		const char *	name,
		int	value
	)

Writes an integer value.

The function writes a single integer value (with or without a name) to the file storage.

Parameters

fs	File storage
name	Name of the written value. Should be NULL if and only if the parent structure is a sequence.
value	The written value

§ cvWriteRawData()

void cvWriteRawData	(	CvFileStorage *	fs,
		const void *	src,
		int	len,
		const char *	dt
	)

Writes multiple numbers.

The function writes an array, whose elements consist of single or multiple numbers. The function call can be replaced with a loop containing a few cvWriteInt and cvWriteReal calls, but a single call is more efficient. Note that because none of the elements have a name, they should be written to a sequence rather than a map.

Parameters

fs	File storage
src	Pointer to the written array
len	Number of the array elements to write
dt	Specification of each array element, see format specification

§ cvWriteRawDataBase64()

void cvWriteRawDataBase64	(	CvFileStorage *	fs,
		const void *	src,
		int	len,
		const char *	dt
	)

Writes multiple numbers in Base64.

If either CV_STORAGE_WRITE_BASE64 or cv::FileStorage::WRITE_BASE64 is used, this function will be the same as cvWriteRawData. If neither, the main difference is that it outputs a sequence in Base64 encoding rather than in plain text.

This function can only be used to write a sequence with a type "binary".

Consider the following two examples where their output is the same:

        CvFileStorage* fs = cvOpenFileStorage( "example.xml", 0, CV_STORAGE_WRITE );
        // both CV_NODE_SEQ and "binary" are necessary.
        cvStartWriteStruct(fs, "rawdata", CV_NODE_SEQ | CV_NODE_FLOW, "binary");
        cvWriteRawDataBase64(fs, rawdata.data(), static_cast<int>(rawdata.size()), "i");
        cvEndWriteStruct(fs);
        cvReleaseFileStorage( &fs );

and

        CvFileStorage* fs = cvOpenFileStorage( "example.xml", 0, CV_STORAGE_WRITE_BASE64);
        // parameter, typename "binary" could be omitted.
        cvStartWriteStruct(fs, "rawdata", CV_NODE_SEQ | CV_NODE_FLOW);
        cvWriteRawData(fs, rawdata.data(), static_cast<int>(rawdata.size()), "i");
        cvEndWriteStruct(fs);
        cvReleaseFileStorage( &fs );

Parameters

fs	File storage
src	Pointer to the written array
len	Number of the array elements to write
dt	Specification of each array element, see format specification

§ cvWriteReal()

void cvWriteReal	(	CvFileStorage *	fs,
		const char *	name,
		double	value
	)

Writes a floating-point value.

The function writes a single floating-point value (with or without a name) to file storage. Special values are encoded as follows: NaN (Not A Number) as .NaN, infinity as +.Inf or -.Inf.

The following example shows how to use the low-level writing functions to store custom structures, such as termination criteria, without registering a new type. :

void write_termcriteria( CvFileStorage* fs, const char* struct_name,
                         CvTermCriteria* termcrit )
{
    cvStartWriteStruct( fs, struct_name, CV_NODE_MAP, NULL, cvAttrList(0,0));
    cvWriteComment( fs, "termination criteria", 1 ); // just a description
    if( termcrit->type & CV_TERMCRIT_ITER )
        cvWriteInteger( fs, "max_iterations", termcrit->max_iter );
    if( termcrit->type & CV_TERMCRIT_EPS )
        cvWriteReal( fs, "accuracy", termcrit->epsilon );
    cvEndWriteStruct( fs );
}

Parameters

fs	File storage
name	Name of the written value. Should be NULL if and only if the parent structure is a sequence.
value	The written value

§ cvWriteString()

void cvWriteString	(	CvFileStorage *	fs,
		const char *	name,
		const char *	str,
		int	quote = `0`
	)

Writes a text string.

The function writes a text string to file storage.

Parameters

fs	File storage
name	Name of the written string . Should be NULL if and only if the parent structure is a sequence.
str	The written text string
quote	If non-zero, the written string is put in quotes, regardless of whether they are required. Otherwise, if the flag is zero, quotes are used only when they are required (e.g. when the string starts with a digit or contains spaces).

§ cvXor()

void cvXor	(	const CvArr *	src1,
		const CvArr *	src2,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src1(idx) ^ src2(idx)

§ cvXorS()

void cvXorS	(	const CvArr *	src,
		CvScalar	value,
		CvArr *	dst,
		const CvArr *	mask = `NULL`
	)

dst(idx) = src(idx) ^ value

Modules

Classes

Macros

Typedefs

Enumerations

Functions

Flags for cvCalcCovarMatrix

Flags for cvNorm and cvNormalize

Flags for cvReduce

Flags for cvDFT, cvDCT and cvMulSpectrums

Graph

Detailed Description

Macro Definition Documentation

§ __CV_BEGIN__

§ __CV_END__

§ __CV_EXIT__

§ CV_ARE_CNS_EQ

§ CV_ARE_DEPTHS_EQ

§ CV_ARE_SIZES_EQ

§ CV_ARE_TYPES_EQ

§ CV_ASSERT

§ CV_AUTO_STEP

§ CV_AUTOSTEP

§ CV_BACK

§ CV_C

§ CV_CALL

§ CV_CHECK

§ CV_CHECK_QUIET

§ CV_CHECK_RANGE

§ CV_CHOLESKY

§ CV_CMP

§ CV_CMP_EQ

§ CV_CMP_GE

§ CV_CMP_GT

§ CV_CMP_LE

§ CV_CMP_LT

§ CV_CMP_NE

§ CV_CONTOUR_FIELDS

§ CV_COVAR_COLS

§ CV_COVAR_NORMAL

§ CV_COVAR_ROWS

§ CV_COVAR_SCALE

§ CV_COVAR_SCRAMBLED

§ CV_COVAR_USE_AVG

§ CV_CURRENT_POINT

§ CV_DIFF

§ CV_DIFF_C

§ CV_DIFF_L1

§ CV_DIFF_L2

§ CV_DXT_FORWARD

§ CV_DXT_INV_SCALE

§ CV_DXT_INVERSE

§ CV_DXT_INVERSE_SCALE

§ CV_DXT_MUL_CONJ

§ CV_DXT_ROWS

§ CV_DXT_SCALE

§ CV_ErrModeLeaf

§ CV_ErrModeParent

§ CV_ErrModeSilent

§ CV_ERROR

§ CV_FRONT

§ CV_FUNCNAME

§ CV_GEMM_A_T

§ CV_GEMM_B_T

§ CV_GEMM_C_T

§ CV_GET_SEQ_ELEM

§ CV_GRAPH

§ CV_GRAPH_ALL_ITEMS

§ CV_GRAPH_ANY_EDGE

§ CV_GRAPH_BACK_EDGE

§ CV_GRAPH_BACKTRACKING

§ CV_GRAPH_CROSS_EDGE

§ CV_GRAPH_EDGE_FIELDS

§ CV_GRAPH_FIELDS

§ CV_GRAPH_FLAG_ORIENTED

§ CV_GRAPH_FORWARD_EDGE

§ CV_GRAPH_FORWARD_EDGE_FLAG

§ CV_GRAPH_ITEM_VISITED_FLAG

§ CV_GRAPH_NEW_TREE

§ CV_GRAPH_OVER