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3 changed files with 60 additions and 59 deletions
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#pragma once |
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#include <opencv2/features2d.hpp> |
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#include <opencv2/video/background_segm.hpp> |
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//#include <opencv2/video/background_segm.hpp>
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#include "LBSP.h" |
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/*!
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Local Binary Similarity Pattern (LBSP) foreground-background segmentation algorithm (abstract version). |
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Local Binary Similarity Pattern (LBSP) foreground-background segmentation algorithm (abstract version). |
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For more details on the different parameters, see P.-L. St-Charles and G.-A. Bilodeau, "Improving Background |
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Subtraction using Local Binary Similarity Patterns", in WACV 2014, or G.-A. Bilodeau et al, "Change Detection |
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in Feature Space Using Local Binary Similarity Patterns", in CRV 2013. |
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For more details on the different parameters, see P.-L. St-Charles and G.-A. Bilodeau, "Improving Background |
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Subtraction using Local Binary Similarity Patterns", in WACV 2014, or G.-A. Bilodeau et al, "Change Detection |
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in Feature Space Using Local Binary Similarity Patterns", in CRV 2013. |
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This algorithm is currently NOT thread-safe. |
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This algorithm is currently NOT thread-safe. |
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*/ |
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class BackgroundSubtractorLBSP /* : public cv::BackgroundSubtractor */ { |
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public: |
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//! full constructor
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BackgroundSubtractorLBSP(float fRelLBSPThreshold, size_t nDescDistThreshold, size_t nLBSPThresholdOffset=0); |
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//! default destructor
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virtual ~BackgroundSubtractorLBSP(); |
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//! (re)initiaization method; needs to be called before starting background subtraction
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virtual void initialize(const cv::Mat& oInitImg); |
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//! (re)initiaization method; needs to be called before starting background subtraction (note: also reinitializes the keypoints vector)
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virtual void initialize(const cv::Mat& oInitImg, const std::vector<cv::KeyPoint>& voKeyPoints)=0; |
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//! primary model update function; the learning param is used to override the internal learning speed (ignored when <= 0)
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virtual void operator()(cv::InputArray image, cv::OutputArray fgmask, double learningRate=0)=0; |
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//! unused, always returns nullptr
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virtual cv::AlgorithmInfo* info() const; |
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//! returns a copy of the latest reconstructed background descriptors image
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virtual void getBackgroundDescriptorsImage(cv::OutputArray backgroundDescImage) const; |
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//! returns the keypoints list used for descriptor extraction (note: by default, these are generated from the DenseFeatureDetector class, and the border points are removed)
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virtual std::vector<cv::KeyPoint> getBGKeyPoints() const; |
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//! sets the keypoints to be used for descriptor extraction, effectively setting the BGModel ROI (note: this function will remove all border keypoints)
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virtual void setBGKeyPoints(std::vector<cv::KeyPoint>& keypoints); |
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class BackgroundSubtractorLBSP /* : public cv::BackgroundSubtractor */ |
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{ |
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public: |
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//! full constructor
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BackgroundSubtractorLBSP( float fRelLBSPThreshold, size_t nDescDistThreshold, size_t nLBSPThresholdOffset = 0 ); |
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//! default destructor
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virtual ~BackgroundSubtractorLBSP(); |
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//! (re)initiaization method; needs to be called before starting background subtraction
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virtual void initialize( const cv::Mat& oInitImg ); |
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//! (re)initiaization method; needs to be called before starting background subtraction (note: also reinitializes the keypoints vector)
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virtual void initialize( const cv::Mat& oInitImg, const std::vector<cv::KeyPoint>& voKeyPoints )=0; |
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//! primary model update function; the learning param is used to override the internal learning speed (ignored when <= 0)
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virtual void operator()( cv::InputArray image, cv::OutputArray fgmask, double learningRate = 0 )=0; |
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//! unused, always returns nullptr
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cv::AlgorithmInfo* info() const; |
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//! returns a copy of the latest reconstructed background descriptors image
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virtual void getBackgroundDescriptorsImage( cv::OutputArray backgroundDescImage ) const; |
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//! returns the keypoints list used for descriptor extraction (note: by default, these are generated from the DenseFeatureDetector class, and the border points are removed)
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virtual std::vector<cv::KeyPoint> getBGKeyPoints() const; |
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//! sets the keypoints to be used for descriptor extraction, effectively setting the BGModel ROI (note: this function will remove all border keypoints)
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virtual void setBGKeyPoints( std::vector<cv::KeyPoint>& keypoints ); |
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// ######## DEBUG PURPOSES ONLY ##########
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int nDebugCoordX, nDebugCoordY; |
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// ######## DEBUG PURPOSES ONLY ##########
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int nDebugCoordX, nDebugCoordY; |
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protected: |
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//! background model descriptors samples (tied to m_voKeyPoints but shaped like the input frames)
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std::vector<cv::Mat> m_voBGDescSamples; |
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//! background model keypoints used for LBSP descriptor extraction (specific to the input image size)
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std::vector<cv::KeyPoint> m_voKeyPoints; |
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//! defines the current number of used keypoints (always tied to m_voKeyPoints)
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size_t m_nKeyPoints; |
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//! input image size
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cv::Size m_oImgSize; |
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//! input image channel size
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size_t m_nImgChannels; |
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//! input image type
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int m_nImgType; |
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//! absolute descriptor distance threshold
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const size_t m_nDescDistThreshold; |
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//! LBSP internal threshold offset value -- used to reduce texture noise in dark regions
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const size_t m_nLBSPThresholdOffset; |
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//! LBSP relative internal threshold (kept here since we don't keep an LBSP object)
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const float m_fRelLBSPThreshold; |
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//! pre-allocated internal LBSP threshold values for all possible 8-bit intensity values
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size_t m_anLBSPThreshold_8bitLUT[UCHAR_MAX+1]; |
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//! defines whether or not the subtractor is fully initialized
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bool m_bInitialized; |
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protected: |
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//! background model descriptors samples (tied to m_voKeyPoints but shaped like the input frames)
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std::vector<cv::Mat> m_voBGDescSamples; |
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//! background model keypoints used for LBSP descriptor extraction (specific to the input image size)
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std::vector<cv::KeyPoint> m_voKeyPoints; |
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//! defines the current number of used keypoints (always tied to m_voKeyPoints)
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size_t m_nKeyPoints; |
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//! input image size
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cv::Size m_oImgSize; |
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//! input image channel size
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size_t m_nImgChannels; |
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//! input image type
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int m_nImgType; |
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//! absolute descriptor distance threshold
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const size_t m_nDescDistThreshold; |
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//! LBSP internal threshold offset value -- used to reduce texture noise in dark regions
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const size_t m_nLBSPThresholdOffset; |
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//! LBSP relative internal threshold (kept here since we don't keep an LBSP object)
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const float m_fRelLBSPThreshold; |
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//! pre-allocated internal LBSP threshold values for all possible 8-bit intensity values
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size_t m_anLBSPThreshold_8bitLUT[UCHAR_MAX + 1]; |
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//! defines whether or not the subtractor is fully initialized
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bool m_bInitialized; |
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}; |
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