BackgroundSubtractorLBSP Class Reference

#include <BackgroundSubtractorLBSP.h>

Inheritance diagram for BackgroundSubtractorLBSP:

Classes
struct	PxInfoBase

Public Member Functions
	BackgroundSubtractorLBSP (float fRelLBSPThreshold, size_t nLBSPThresholdOffset=0)
	full constructor
virtual	~BackgroundSubtractorLBSP ()
	default destructor
virtual void	initialize (const cv::Mat &oInitImg)
	(re)initiaization method; needs to be called before starting background subtraction
virtual void	initialize (const cv::Mat &oInitImg, const cv::Mat &oROI)=0
	(re)initiaization method; needs to be called before starting background subtraction
virtual void	apply (cv::InputArray image, cv::OutputArray fgmask, double learningRate=0)=0
	primary model update function; the learning param is used to override the internal learning speed (ignored when <= 0)
virtual cv::Mat	getROICopy () const
	returns a copy of the ROI used for descriptor extraction
virtual void	setROI (cv::Mat &oROI)
	sets the ROI to be used for descriptor extraction (note: this function will reinit the model and return the usable ROI)
void	setAutomaticModelReset (bool)
	turns automatic model reset on or off

Public Attributes
int	m_nDebugCoordX
int	m_nDebugCoordY
std::string	m_sDebugName
cv::FileStorage *	m_pDebugFS

Protected Attributes
cv::Mat	m_oROI
	background model ROI used for LBSP descriptor extraction (specific to the input image size)
cv::Size	m_oImgSize
	input image size
size_t	m_nImgChannels
	input image channel size
int	m_nImgType
	input image type
const size_t	m_nLBSPThresholdOffset
	LBSP internal threshold offset value, used to reduce texture noise in dark regions.
const float	m_fRelLBSPThreshold
	LBSP relative internal threshold (kept here since we don't keep an LBSP object)
size_t	m_nTotPxCount
	total number of pixels (depends on the input frame size) & total number of relevant pixels
size_t	m_nTotRelevantPxCount
size_t	m_nFrameIndex
	current frame index, frame count since last model reset & model reset cooldown counters
size_t	m_nFramesSinceLastReset
size_t	m_nModelResetCooldown
size_t	m_anLBSPThreshold_8bitLUT [UCHAR_MAX+1]
	pre-allocated internal LBSP threshold values LUT for all possible 8-bit intensities
size_t *	m_aPxIdxLUT
	internal pixel index LUT for all relevant analysis regions (based on the provided ROI)
PxInfoBase *	m_aPxInfoLUT
	internal pixel info LUT for all possible pixel indexes
const int	m_nDefaultMedianBlurKernelSize
	default kernel size for median blur post-proc filtering
bool	m_bInitialized
	specifies whether the algorithm is fully initialized or not
bool	m_bAutoModelResetEnabled
	specifies whether automatic model resets are enabled or not
bool	m_bUsingMovingCamera
	specifies whether the camera is considered moving or not
cv::Mat	m_oLastColorFrame
	copy of latest pixel intensities (used when refreshing model)
cv::Mat	m_oLastDescFrame
	copy of latest descriptors (used when refreshing model)
cv::Mat	m_oLastFGMask
	the foreground mask generated by the method at [t-1]

Detailed Description

Local Binary Similarity Pattern (LBSP)-based change detection algorithm (abstract version/base class).

For more details on the different parameters, see P.-L. St-Charles and G.-A. Bilodeau, "Improving Background Subtraction using Local Binary Similarity Patterns", in WACV 2014, or G.-A. Bilodeau et al, "Change Detection in Feature Space Using Local Binary Similarity Patterns", in CRV 2013.

This algorithm is currently NOT thread-safe.

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The documentation for this class was generated from the following files:

• src/BackgroundSubtractorLBSP.h
• src/BackgroundSubtractorLBSP.cpp