org.bytedeco.opencv.opencv_cudaoptflow

Class NvidiaOpticalFlow_1_0

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.opencv.opencv_core.Algorithm

org.bytedeco.opencv.opencv_cudaoptflow.NvidiaHWOpticalFlow

org.bytedeco.opencv.opencv_cudaoptflow.NvidiaOpticalFlow_1_0

All Implemented Interfaces:

AutoCloseable

@Namespace(value="cv::cuda")
 @Properties(inherit=opencv_cudaoptflow.class)
public class NvidiaOpticalFlow_1_0
extends NvidiaHWOpticalFlow

\brief Class for computing the optical flow vectors between two images using NVIDIA Optical Flow hardware and Optical Flow SDK 1.0. \note - A sample application demonstrating the use of NVIDIA Optical Flow can be found at opencv_source_code/samples/gpu/nvidia_optical_flow.cpp - An example application comparing accuracy and performance of NVIDIA Optical Flow with other optical flow algorithms in OpenCV can be found at opencv_source_code/samples/gpu/optical_flow.cpp

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator, Pointer.ReferenceCounter

Field Summary

Fields

Modifier and Type	Field and Description
static int	NV_OF_PERF_LEVEL_FAST enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL
static int	NV_OF_PERF_LEVEL_MAX enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL
static int	NV_OF_PERF_LEVEL_MEDIUM enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL
static int	NV_OF_PERF_LEVEL_SLOW enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL
static int	NV_OF_PERF_LEVEL_UNDEFINED enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
NvidiaOpticalFlow_1_0(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
static NvidiaOpticalFlow_1_0	create(int width, int height)
static NvidiaOpticalFlow_1_0	create(int width, int height, int perfPreset, boolean enableTemporalHints, boolean enableExternalHints, boolean enableCostBuffer, int gpuId) \brief Instantiate NVIDIA Optical Flow
void	upSampler(GpuMat flow, int width, int height, int gridSize, GpuMat upsampledFlow)
void	upSampler(Mat flow, int width, int height, int gridSize, Mat upsampledFlow) \brief The NVIDIA optical flow hardware generates flow vectors at granularity gridSize, which can be queried via function getGridSize().
void	upSampler(UMat flow, int width, int height, int gridSize, UMat upsampledFlow)

Methods inherited from class org.bytedeco.opencv.opencv_cudaoptflow.NvidiaHWOpticalFlow

calc, calc, calc, calc, calc, calc, collectGarbage, getGridSize

Methods inherited from class org.bytedeco.opencv.opencv_core.Algorithm

clear, empty, getDefaultName, position, read, save, save, write, write, write

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, parseBytes, physicalBytes, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, toString, totalBytes, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

NV_OF_PERF_LEVEL_UNDEFINED

public static final int NV_OF_PERF_LEVEL_UNDEFINED

enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

See Also:

Constant Field Values

NV_OF_PERF_LEVEL_SLOW

public static final int NV_OF_PERF_LEVEL_SLOW

enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

See Also:

Constant Field Values

NV_OF_PERF_LEVEL_MEDIUM

public static final int NV_OF_PERF_LEVEL_MEDIUM

enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

See Also:

Constant Field Values

NV_OF_PERF_LEVEL_FAST

public static final int NV_OF_PERF_LEVEL_FAST

enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

See Also:

Constant Field Values

NV_OF_PERF_LEVEL_MAX

public static final int NV_OF_PERF_LEVEL_MAX

enum cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL

See Also:

Constant Field Values

Constructor Detail

NvidiaOpticalFlow_1_0

public NvidiaOpticalFlow_1_0(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

Method Detail

upSampler

public void upSampler(@ByVal
                      Mat flow,
                      int width,
                      int height,
                      int gridSize,
                      @ByVal
                      Mat upsampledFlow)

\brief The NVIDIA optical flow hardware generates flow vectors at granularity gridSize, which can be queried via function getGridSize(). Upsampler() helper function converts the hardware-generated flow vectors to dense representation (1 flow vector for each pixel) using nearest neighbour upsampling method.

Parameters:

flow - Buffer of type CV_16FC2 containing flow vectors generated by calc().

width - Width of the input image in pixels for which these flow vectors were generated.

height - Height of the input image in pixels for which these flow vectors were generated.

gridSize - Granularity of the optical flow vectors returned by calc() function. Can be queried using getGridSize().

upsampledFlow - Buffer of type CV_32FC2, containing upsampled flow vectors, each flow vector for 1 pixel, in the pitch-linear layout.

upSampler

public void upSampler(@ByVal
                      UMat flow,
                      int width,
                      int height,
                      int gridSize,
                      @ByVal
                      UMat upsampledFlow)

upSampler

public void upSampler(@ByVal
                      GpuMat flow,
                      int width,
                      int height,
                      int gridSize,
                      @ByVal
                      GpuMat upsampledFlow)

create

@opencv_core.Ptr
public static NvidiaOpticalFlow_1_0 create(int width,
                                                            int height,
                                                            @Cast(value="cv::cuda::NvidiaOpticalFlow_1_0::NVIDIA_OF_PERF_LEVEL")
                                                            int perfPreset,
                                                            @Cast(value="bool")
                                                            boolean enableTemporalHints,
                                                            @Cast(value="bool")
                                                            boolean enableExternalHints,
                                                            @Cast(value="bool")
                                                            boolean enableCostBuffer,
                                                            int gpuId)

\brief Instantiate NVIDIA Optical Flow

Parameters:

width - Width of input image in pixels.

height - Height of input image in pixels.

perfPreset - Optional parameter. Refer [NV OF SDK documentation](https://developer.nvidia.com/opticalflow-sdk) for details about presets. Defaults to NV_OF_PERF_LEVEL_SLOW.

enableTemporalHints - Optional parameter. Flag to enable temporal hints. When set to true, the hardware uses the flow vectors generated in previous call to calc() as internal hints for the current call to calc(). Useful when computing flow vectors between successive video frames. Defaults to false.

enableExternalHints - Optional Parameter. Flag to enable passing external hints buffer to calc(). Defaults to false.

enableCostBuffer - Optional Parameter. Flag to enable cost buffer output from calc(). Defaults to false.

gpuId - Optional parameter to select the GPU ID on which the optical flow should be computed. Useful in multi-GPU systems. Defaults to 0.

create

@opencv_core.Ptr
public static NvidiaOpticalFlow_1_0 create(int width,
                                                            int height)