org.bytedeco.opencv.opencv_bgsegm

Class BackgroundSubtractorGMG

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.opencv.opencv_core.Algorithm

org.bytedeco.opencv.opencv_video.BackgroundSubtractor

org.bytedeco.opencv.opencv_bgsegm.BackgroundSubtractorGMG

All Implemented Interfaces:

AutoCloseable

@Namespace(value="cv::bgsegm")
 @Properties(inherit=opencv_bgsegm.class)
public class BackgroundSubtractorGMG
extends BackgroundSubtractor

\brief Background Subtractor module based on the algorithm given in \cite Gold2012 .

Takes a series of images and returns a sequence of mask (8UC1) images of the same size, where 255 indicates Foreground and 0 represents Background. This class implements an algorithm described in "Visual Tracking of Human Visitors under Variable-Lighting Conditions for a Responsive Audio Art Installation," A. Godbehere, A. Matsukawa, K. Goldberg, American Control Conference, Montreal, June 2012.

Nested Class Summary

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

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

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
double	getBackgroundPrior() \brief Returns the prior probability that each individual pixel is a background pixel.
double	getDecisionThreshold() \brief Returns the value of decision threshold.
double	getDefaultLearningRate() \brief Returns the learning rate of the algorithm.
int	getMaxFeatures() \brief Returns total number of distinct colors to maintain in histogram.
double	getMaxVal() \brief Returns the maximum value taken on by pixels in image sequence.
double	getMinVal() \brief Returns the minimum value taken on by pixels in image sequence.
int	getNumFrames() \brief Returns the number of frames used to initialize background model.
int	getQuantizationLevels() \brief Returns the parameter used for quantization of color-space.
int	getSmoothingRadius() \brief Returns the kernel radius used for morphological operations
boolean	getUpdateBackgroundModel() \brief Returns the status of background model update
void	setBackgroundPrior(double bgprior) \brief Sets the prior probability that each individual pixel is a background pixel.
void	setDecisionThreshold(double thresh) \brief Sets the value of decision threshold.
void	setDefaultLearningRate(double lr) \brief Sets the learning rate of the algorithm.
void	setMaxFeatures(int maxFeatures) \brief Sets total number of distinct colors to maintain in histogram.
void	setMaxVal(double val) \brief Sets the maximum value taken on by pixels in image sequence.
void	setMinVal(double val) \brief Sets the minimum value taken on by pixels in image sequence.
void	setNumFrames(int nframes) \brief Sets the number of frames used to initialize background model.
void	setQuantizationLevels(int nlevels) \brief Sets the parameter used for quantization of color-space
void	setSmoothingRadius(int radius) \brief Sets the kernel radius used for morphological operations
void	setUpdateBackgroundModel(boolean update) \brief Sets the status of background model update

Methods inherited from class org.bytedeco.opencv.opencv_video.BackgroundSubtractor

apply, apply, apply, apply, apply, apply, getBackgroundImage, getBackgroundImage, getBackgroundImage

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

Constructor Detail

BackgroundSubtractorGMG

public BackgroundSubtractorGMG(Pointer p)

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

Method Detail

getMaxFeatures

public int getMaxFeatures()

\brief Returns total number of distinct colors to maintain in histogram.

setMaxFeatures

public void setMaxFeatures(int maxFeatures)

\brief Sets total number of distinct colors to maintain in histogram.

getDefaultLearningRate

public double getDefaultLearningRate()

\brief Returns the learning rate of the algorithm.

It lies between 0.0 and 1.0. It determines how quickly features are "forgotten" from histograms.

setDefaultLearningRate

public void setDefaultLearningRate(double lr)

\brief Sets the learning rate of the algorithm.

getNumFrames

public int getNumFrames()

\brief Returns the number of frames used to initialize background model.

setNumFrames

public void setNumFrames(int nframes)

\brief Sets the number of frames used to initialize background model.

getQuantizationLevels

public int getQuantizationLevels()

\brief Returns the parameter used for quantization of color-space.

It is the number of discrete levels in each channel to be used in histograms.

setQuantizationLevels

public void setQuantizationLevels(int nlevels)

\brief Sets the parameter used for quantization of color-space

getBackgroundPrior

public double getBackgroundPrior()

\brief Returns the prior probability that each individual pixel is a background pixel.

setBackgroundPrior

public void setBackgroundPrior(double bgprior)

\brief Sets the prior probability that each individual pixel is a background pixel.

getSmoothingRadius

public int getSmoothingRadius()

\brief Returns the kernel radius used for morphological operations

setSmoothingRadius

public void setSmoothingRadius(int radius)

\brief Sets the kernel radius used for morphological operations

getDecisionThreshold

public double getDecisionThreshold()

\brief Returns the value of decision threshold.

Decision value is the value above which pixel is determined to be FG.

setDecisionThreshold

public void setDecisionThreshold(double thresh)

\brief Sets the value of decision threshold.

getUpdateBackgroundModel

@Cast(value="bool")
public boolean getUpdateBackgroundModel()

\brief Returns the status of background model update

setUpdateBackgroundModel

public void setUpdateBackgroundModel(@Cast(value="bool")
                                     boolean update)

\brief Sets the status of background model update

getMinVal

public double getMinVal()

\brief Returns the minimum value taken on by pixels in image sequence. Usually 0.

setMinVal

public void setMinVal(double val)

\brief Sets the minimum value taken on by pixels in image sequence.

getMaxVal

public double getMaxVal()

\brief Returns the maximum value taken on by pixels in image sequence. e.g. 1.0 or 255.

setMaxVal

public void setMaxVal(double val)

\brief Sets the maximum value taken on by pixels in image sequence.