opencv/modules/legacy/include/opencv2/legacy.hpp

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#ifndef __OPENCV_LEGACY_HPP__
#define __OPENCV_LEGACY_HPP__

#include "opencv2/imgproc/imgproc_c.h"
#include "opencv2/calib3d/calib3d_c.h"
#include "opencv2/ml.hpp"

#ifdef __cplusplus
#include "opencv2/features2d.hpp"
extern "C" {
#endif

CVAPI(CvSeq*) cvSegmentImage( const CvArr* srcarr, CvArr* dstarr,
                                    double canny_threshold,
                                    double ffill_threshold,
                                    CvMemStorage* storage );

/****************************************************************************************\
*                                  Eigen objects                                         *
\****************************************************************************************/

typedef int (CV_CDECL * CvCallback)(int index, void* buffer, void* user_data);
typedef union
{
    CvCallback callback;
    void* data;
}
CvInput;

#define CV_EIGOBJ_NO_CALLBACK     0
#define CV_EIGOBJ_INPUT_CALLBACK  1
#define CV_EIGOBJ_OUTPUT_CALLBACK 2
#define CV_EIGOBJ_BOTH_CALLBACK   3

/* Calculates covariation matrix of a set of arrays */
CVAPI(void)  cvCalcCovarMatrixEx( int nObjects, void* input, int ioFlags,
                                  int ioBufSize, uchar* buffer, void* userData,
                                  IplImage* avg, float* covarMatrix );

/* Calculates eigen values and vectors of covariation matrix of a set of
   arrays */
CVAPI(void)  cvCalcEigenObjects( int nObjects, void* input, void* output,
                                 int ioFlags, int ioBufSize, void* userData,
                                 CvTermCriteria* calcLimit, IplImage* avg,
                                 float* eigVals );

/* Calculates dot product (obj - avg) * eigObj (i.e. projects image to eigen vector) */
CVAPI(double)  cvCalcDecompCoeff( IplImage* obj, IplImage* eigObj, IplImage* avg );

/* Projects image to eigen space (finds all decomposion coefficients */
CVAPI(void)  cvEigenDecomposite( IplImage* obj, int nEigObjs, void* eigInput,
                                 int ioFlags, void* userData, IplImage* avg,
                                 float* coeffs );

/* Projects original objects used to calculate eigen space basis to that space */
CVAPI(void)  cvEigenProjection( void* eigInput, int nEigObjs, int ioFlags,
                                void* userData, float* coeffs, IplImage* avg,
                                IplImage* proj );

/****************************************************************************************\
*                                       1D/2D HMM                                        *
\****************************************************************************************/

typedef struct CvImgObsInfo
{
    int obs_x;
    int obs_y;
    int obs_size;
    float* obs;//consequtive observations

    int* state;/* arr of pairs superstate/state to which observation belong */
    int* mix;  /* number of mixture to which observation belong */

} CvImgObsInfo;/*struct for 1 image*/

typedef CvImgObsInfo Cv1DObsInfo;

typedef struct CvEHMMState
{
    int num_mix;        /*number of mixtures in this state*/
    float* mu;          /*mean vectors corresponding to each mixture*/
    float* inv_var;     /* square root of inversed variances corresp. to each mixture*/
    float* log_var_val; /* sum of 0.5 (LN2PI + ln(variance[i]) ) for i=1,n */
    float* weight;      /*array of mixture weights. Summ of all weights in state is 1. */

} CvEHMMState;

typedef struct CvEHMM
{
    int level; /* 0 - lowest(i.e its states are real states), ..... */
    int num_states; /* number of HMM states */
    float*  transP;/*transition probab. matrices for states */
    float** obsProb; /* if level == 0 - array of brob matrices corresponding to hmm
                        if level == 1 - martix of matrices */
    union
    {
        CvEHMMState* state; /* if level == 0 points to real states array,
                               if not - points to embedded hmms */
        struct CvEHMM* ehmm; /* pointer to an embedded model or NULL, if it is a leaf */
    } u;

} CvEHMM;

/*CVAPI(int)  icvCreate1DHMM( CvEHMM** this_hmm,
                                   int state_number, int* num_mix, int obs_size );

CVAPI(int)  icvRelease1DHMM( CvEHMM** phmm );

CVAPI(int)  icvUniform1DSegm( Cv1DObsInfo* obs_info, CvEHMM* hmm );

CVAPI(int)  icvInit1DMixSegm( Cv1DObsInfo** obs_info_array, int num_img, CvEHMM* hmm);

CVAPI(int)  icvEstimate1DHMMStateParams( CvImgObsInfo** obs_info_array, int num_img, CvEHMM* hmm);

CVAPI(int)  icvEstimate1DObsProb( CvImgObsInfo* obs_info, CvEHMM* hmm );

CVAPI(int)  icvEstimate1DTransProb( Cv1DObsInfo** obs_info_array,
                                           int num_seq,
                                           CvEHMM* hmm );

CVAPI(float)  icvViterbi( Cv1DObsInfo* obs_info, CvEHMM* hmm);

CVAPI(int)  icv1DMixSegmL2( CvImgObsInfo** obs_info_array, int num_img, CvEHMM* hmm );*/

/*********************************** Embedded HMMs *************************************/

/* Creates 2D HMM */
CVAPI(CvEHMM*)  cvCreate2DHMM( int* stateNumber, int* numMix, int obsSize );

/* Releases HMM */
CVAPI(void)  cvRelease2DHMM( CvEHMM** hmm );

#define CV_COUNT_OBS(roi, win, delta, numObs )                                       \
{                                                                                    \
   (numObs)->width  =((roi)->width  -(win)->width  +(delta)->width)/(delta)->width;  \
   (numObs)->height =((roi)->height -(win)->height +(delta)->height)/(delta)->height;\
}

/* Creates storage for observation vectors */
CVAPI(CvImgObsInfo*)  cvCreateObsInfo( CvSize numObs, int obsSize );

/* Releases storage for observation vectors */
CVAPI(void)  cvReleaseObsInfo( CvImgObsInfo** obs_info );


/* The function takes an image on input and and returns the sequnce of observations
   to be used with an embedded HMM; Each observation is top-left block of DCT
   coefficient matrix */
CVAPI(void)  cvImgToObs_DCT( const CvArr* arr, float* obs, CvSize dctSize,
                             CvSize obsSize, CvSize delta );


/* Uniformly segments all observation vectors extracted from image */
CVAPI(void)  cvUniformImgSegm( CvImgObsInfo* obs_info, CvEHMM* ehmm );

/* Does mixture segmentation of the states of embedded HMM */
CVAPI(void)  cvInitMixSegm( CvImgObsInfo** obs_info_array,
                            int num_img, CvEHMM* hmm );

/* Function calculates means, variances, weights of every Gaussian mixture
   of every low-level state of embedded HMM */
CVAPI(void)  cvEstimateHMMStateParams( CvImgObsInfo** obs_info_array,
                                       int num_img, CvEHMM* hmm );

/* Function computes transition probability matrices of embedded HMM
   given observations segmentation */
CVAPI(void)  cvEstimateTransProb( CvImgObsInfo** obs_info_array,
                                  int num_img, CvEHMM* hmm );

/* Function computes probabilities of appearing observations at any state
   (i.e. computes P(obs|state) for every pair(obs,state)) */
CVAPI(void)  cvEstimateObsProb( CvImgObsInfo* obs_info,
                                CvEHMM* hmm );

/* Runs Viterbi algorithm for embedded HMM */
CVAPI(float)  cvEViterbi( CvImgObsInfo* obs_info, CvEHMM* hmm );


/* Function clusters observation vectors from several images
   given observations segmentation.
   Euclidean distance used for clustering vectors.
   Centers of clusters are given means of every mixture */
CVAPI(void)  cvMixSegmL2( CvImgObsInfo** obs_info_array,
                          int num_img, CvEHMM* hmm );

/****************************************************************************************\
*               A few functions from old stereo gesture recognition demosions            *
\****************************************************************************************/

/* Creates hand mask image given several points on the hand */
CVAPI(void)  cvCreateHandMask( CvSeq* hand_points,
                                   IplImage *img_mask, CvRect *roi);

/* Finds hand region in range image data */
CVAPI(void)  cvFindHandRegion (CvPoint3D32f* points, int count,
                                CvSeq* indexs,
                                float* line, CvSize2D32f size, int flag,
                                CvPoint3D32f* center,
                                CvMemStorage* storage, CvSeq **numbers);

/* Finds hand region in range image data (advanced version) */
CVAPI(void)  cvFindHandRegionA( CvPoint3D32f* points, int count,
                                CvSeq* indexs,
                                float* line, CvSize2D32f size, int jc,
                                CvPoint3D32f* center,
                                CvMemStorage* storage, CvSeq **numbers);

/* Calculates the cooficients of the homography matrix */
CVAPI(void)  cvCalcImageHomography( float* line, CvPoint3D32f* center,
                                    float* intrinsic, float* homography );

/****************************************************************************************\
*                           More operations on sequences                                 *
\****************************************************************************************/

/*****************************************************************************************/

#define CV_CURRENT_INT( reader ) (*((int *)(reader).ptr))
#define CV_PREV_INT( reader ) (*((int *)(reader).prev_elem))

#define  CV_GRAPH_WEIGHTED_VERTEX_FIELDS() CV_GRAPH_VERTEX_FIELDS()\
    float weight;

#define  CV_GRAPH_WEIGHTED_EDGE_FIELDS() CV_GRAPH_EDGE_FIELDS()

typedef struct CvGraphWeightedVtx
{
    CV_GRAPH_WEIGHTED_VERTEX_FIELDS()
} CvGraphWeightedVtx;

typedef struct CvGraphWeightedEdge
{
    CV_GRAPH_WEIGHTED_EDGE_FIELDS()
} CvGraphWeightedEdge;

typedef enum CvGraphWeightType
{
    CV_NOT_WEIGHTED,
    CV_WEIGHTED_VTX,
    CV_WEIGHTED_EDGE,
    CV_WEIGHTED_ALL
} CvGraphWeightType;


/* Calculates histogram of a contour */
CVAPI(void)  cvCalcPGH( const CvSeq* contour, CvHistogram* hist );

#define CV_DOMINANT_IPAN 1

/* Finds high-curvature points of the contour */
CVAPI(CvSeq*) cvFindDominantPoints( CvSeq* contour, CvMemStorage* storage,
                                   int method CV_DEFAULT(CV_DOMINANT_IPAN),
                                   double parameter1 CV_DEFAULT(0),
                                   double parameter2 CV_DEFAULT(0),
                                   double parameter3 CV_DEFAULT(0),
                                   double parameter4 CV_DEFAULT(0));

/*****************************************************************************************/


/*******************************Stereo correspondence*************************************/

typedef struct CvCliqueFinder
{
    CvGraph* graph;
    int**    adj_matr;
    int N; //graph size

    // stacks, counters etc/
    int k; //stack size
    int* current_comp;
    int** All;

    int* ne;
    int* ce;
    int* fixp; //node with minimal disconnections
    int* nod;
    int* s; //for selected candidate
    int status;
    int best_score;
    int weighted;
    int weighted_edges;
    float best_weight;
    float* edge_weights;
    float* vertex_weights;
    float* cur_weight;
    float* cand_weight;

} CvCliqueFinder;

#define CLIQUE_TIME_OFF 2
#define CLIQUE_FOUND 1
#define CLIQUE_END   0

/*CVAPI(void) cvStartFindCliques( CvGraph* graph, CvCliqueFinder* finder, int reverse,
                                   int weighted CV_DEFAULT(0),  int weighted_edges CV_DEFAULT(0));
CVAPI(int) cvFindNextMaximalClique( CvCliqueFinder* finder, int* clock_rest CV_DEFAULT(0) );
CVAPI(void) cvEndFindCliques( CvCliqueFinder* finder );

CVAPI(void) cvBronKerbosch( CvGraph* graph );*/


/*F///////////////////////////////////////////////////////////////////////////////////////
//
//    Name:    cvSubgraphWeight
//    Purpose: finds weight of subgraph in a graph
//    Context:
//    Parameters:
//      graph - input graph.
//      subgraph - sequence of pairwise different ints.  These are indices of vertices of subgraph.
//      weight_type - describes the way we measure weight.
//            one of the following:
//            CV_NOT_WEIGHTED - weight of a clique is simply its size
//            CV_WEIGHTED_VTX - weight of a clique is the sum of weights of its vertices
//            CV_WEIGHTED_EDGE - the same but edges
//            CV_WEIGHTED_ALL - the same but both edges and vertices
//      weight_vtx - optional vector of floats, with size = graph->total.
//            If weight_type is either CV_WEIGHTED_VTX or CV_WEIGHTED_ALL
//            weights of vertices must be provided.  If weight_vtx not zero
//            these weights considered to be here, otherwise function assumes
//            that vertices of graph are inherited from CvGraphWeightedVtx.
//      weight_edge - optional matrix of floats, of width and height = graph->total.
//            If weight_type is either CV_WEIGHTED_EDGE or CV_WEIGHTED_ALL
//            weights of edges ought to be supplied.  If weight_edge is not zero
//            function finds them here, otherwise function expects
//            edges of graph to be inherited from CvGraphWeightedEdge.
//            If this parameter is not zero structure of the graph is determined from matrix
//            rather than from CvGraphEdge's.  In particular, elements corresponding to
//            absent edges should be zero.
//    Returns:
//      weight of subgraph.
//    Notes:
//F*/
/*CVAPI(float) cvSubgraphWeight( CvGraph *graph, CvSeq *subgraph,
                                  CvGraphWeightType weight_type CV_DEFAULT(CV_NOT_WEIGHTED),
                                  CvVect32f weight_vtx CV_DEFAULT(0),
                                  CvMatr32f weight_edge CV_DEFAULT(0) );*/


/*F///////////////////////////////////////////////////////////////////////////////////////
//
//    Name:    cvFindCliqueEx
//    Purpose: tries to find clique with maximum possible weight in a graph
//    Context:
//    Parameters:
//      graph - input graph.
//      storage - memory storage to be used by the result.
//      is_complementary - optional flag showing whether function should seek for clique
//            in complementary graph.
//      weight_type - describes our notion about weight.
//            one of the following:
//            CV_NOT_WEIGHTED - weight of a clique is simply its size
//            CV_WEIGHTED_VTX - weight of a clique is the sum of weights of its vertices
//            CV_WEIGHTED_EDGE - the same but edges
//            CV_WEIGHTED_ALL - the same but both edges and vertices
//      weight_vtx - optional vector of floats, with size = graph->total.
//            If weight_type is either CV_WEIGHTED_VTX or CV_WEIGHTED_ALL
//            weights of vertices must be provided.  If weight_vtx not zero
//            these weights considered to be here, otherwise function assumes
//            that vertices of graph are inherited from CvGraphWeightedVtx.
//      weight_edge - optional matrix of floats, of width and height = graph->total.
//            If weight_type is either CV_WEIGHTED_EDGE or CV_WEIGHTED_ALL
//            weights of edges ought to be supplied.  If weight_edge is not zero
//            function finds them here, otherwise function expects
//            edges of graph to be inherited from CvGraphWeightedEdge.
//            Note that in case of CV_WEIGHTED_EDGE or CV_WEIGHTED_ALL
//            nonzero is_complementary implies nonzero weight_edge.
//      start_clique - optional sequence of pairwise different ints.  They are indices of
//            vertices that shall be present in the output clique.
//      subgraph_of_ban - optional sequence of (maybe equal) ints.  They are indices of
//            vertices that shall not be present in the output clique.
//      clique_weight_ptr - optional output parameter.  Weight of found clique stored here.
//      num_generations - optional number of generations in evolutionary part of algorithm,
//            zero forces to return first found clique.
//      quality - optional parameter determining degree of required quality/speed tradeoff.
//            Must be in the range from 0 to 9.
//            0 is fast and dirty, 9 is slow but hopefully yields good clique.
//    Returns:
//      sequence of pairwise different ints.
//      These are indices of vertices that form found clique.
//    Notes:
//      in cases of CV_WEIGHTED_EDGE and CV_WEIGHTED_ALL weights should be nonnegative.
//      start_clique has a priority over subgraph_of_ban.
//F*/
/*CVAPI(CvSeq*) cvFindCliqueEx( CvGraph *graph, CvMemStorage *storage,
                                 int is_complementary CV_DEFAULT(0),
                                 CvGraphWeightType weight_type CV_DEFAULT(CV_NOT_WEIGHTED),
                                 CvVect32f weight_vtx CV_DEFAULT(0),
                                 CvMatr32f weight_edge CV_DEFAULT(0),
                                 CvSeq *start_clique CV_DEFAULT(0),
                                 CvSeq *subgraph_of_ban CV_DEFAULT(0),
                                 float *clique_weight_ptr CV_DEFAULT(0),
                                 int num_generations CV_DEFAULT(3),
                                 int quality CV_DEFAULT(2) );*/


#define CV_UNDEF_SC_PARAM         12345 //default value of parameters

#define CV_IDP_BIRCHFIELD_PARAM1  25
#define CV_IDP_BIRCHFIELD_PARAM2  5
#define CV_IDP_BIRCHFIELD_PARAM3  12
#define CV_IDP_BIRCHFIELD_PARAM4  15
#define CV_IDP_BIRCHFIELD_PARAM5  25


#define  CV_DISPARITY_BIRCHFIELD  0


/*F///////////////////////////////////////////////////////////////////////////
//
//    Name:    cvFindStereoCorrespondence
//    Purpose: find stereo correspondence on stereo-pair
//    Context:
//    Parameters:
//      leftImage - left image of stereo-pair (format 8uC1).
//      rightImage - right image of stereo-pair (format 8uC1).
//   mode - mode of correspondence retrieval (now CV_DISPARITY_BIRCHFIELD only)
//      dispImage - destination disparity image
//      maxDisparity - maximal disparity
//      param1, param2, param3, param4, param5 - parameters of algorithm
//    Returns:
//    Notes:
//      Images must be rectified.
//      All images must have format 8uC1.
//F*/
CVAPI(void)
cvFindStereoCorrespondence(
                   const  CvArr* leftImage, const  CvArr* rightImage,
                   int     mode,
                   CvArr*  dispImage,
                   int     maxDisparity,
                   double  param1 CV_DEFAULT(CV_UNDEF_SC_PARAM),
                   double  param2 CV_DEFAULT(CV_UNDEF_SC_PARAM),
                   double  param3 CV_DEFAULT(CV_UNDEF_SC_PARAM),
                   double  param4 CV_DEFAULT(CV_UNDEF_SC_PARAM),
                   double  param5 CV_DEFAULT(CV_UNDEF_SC_PARAM) );

/*****************************************************************************************/
/************ Epiline functions *******************/



typedef struct CvStereoLineCoeff
{
    double Xcoef;
    double XcoefA;
    double XcoefB;
    double XcoefAB;

    double Ycoef;
    double YcoefA;
    double YcoefB;
    double YcoefAB;

    double Zcoef;
    double ZcoefA;
    double ZcoefB;
    double ZcoefAB;
}CvStereoLineCoeff;


typedef struct CvCamera
{
    float   imgSize[2]; /* size of the camera view, used during calibration */
    float   matrix[9]; /* intinsic camera parameters:  [ fx 0 cx; 0 fy cy; 0 0 1 ] */
    float   distortion[4]; /* distortion coefficients - two coefficients for radial distortion
                              and another two for tangential: [ k1 k2 p1 p2 ] */
    float   rotMatr[9];
    float   transVect[3]; /* rotation matrix and transition vector relatively
                             to some reference point in the space. */
} CvCamera;

typedef struct CvStereoCamera
{
    CvCamera* camera[2]; /* two individual camera parameters */
    float fundMatr[9]; /* fundamental matrix */

    /* New part for stereo */
    CvPoint3D32f epipole[2];
    CvPoint2D32f quad[2][4]; /* coordinates of destination quadrangle after
                                epipolar geometry rectification */
    double coeffs[2][3][3];/* coefficients for transformation */
    CvPoint2D32f border[2][4];
    CvSize warpSize;
    CvStereoLineCoeff* lineCoeffs;
    int needSwapCameras;/* flag set to 1 if need to swap cameras for good reconstruction */
    float rotMatrix[9];
    float transVector[3];
} CvStereoCamera;


typedef struct CvContourOrientation
{
    float egvals[2];
    float egvects[4];

    float max, min; // minimum and maximum projections
    int imax, imin;
} CvContourOrientation;

#define CV_CAMERA_TO_WARP 1
#define CV_WARP_TO_CAMERA 2

CVAPI(int) icvConvertWarpCoordinates(double coeffs[3][3],
                                CvPoint2D32f* cameraPoint,
                                CvPoint2D32f* warpPoint,
                                int direction);

CVAPI(int) icvGetSymPoint3D(  CvPoint3D64f pointCorner,
                            CvPoint3D64f point1,
                            CvPoint3D64f point2,
                            CvPoint3D64f *pointSym2);

CVAPI(void) icvGetPieceLength3D(CvPoint3D64f point1,CvPoint3D64f point2,double* dist);

CVAPI(int) icvCompute3DPoint(    double alpha,double betta,
                            CvStereoLineCoeff* coeffs,
                            CvPoint3D64f* point);

CVAPI(int) icvCreateConvertMatrVect( double*     rotMatr1,
                                double*     transVect1,
                                double*     rotMatr2,
                                double*     transVect2,
                                double*     convRotMatr,
                                double*     convTransVect);

CVAPI(int) icvConvertPointSystem(CvPoint3D64f  M2,
                            CvPoint3D64f* M1,
                            double*     rotMatr,
                            double*     transVect
                            );

CVAPI(int) icvComputeCoeffForStereo(  CvStereoCamera* stereoCamera);

CVAPI(int) icvGetCrossPieceVector(CvPoint2D32f p1_start,CvPoint2D32f p1_end,CvPoint2D32f v2_start,CvPoint2D32f v2_end,CvPoint2D32f *cross);
CVAPI(int) icvGetCrossLineDirect(CvPoint2D32f p1,CvPoint2D32f p2,float a,float b,float c,CvPoint2D32f* cross);
CVAPI(float) icvDefinePointPosition(CvPoint2D32f point1,CvPoint2D32f point2,CvPoint2D32f point);
CVAPI(int) icvStereoCalibration( int numImages,
                            int* nums,
                            CvSize imageSize,
                            CvPoint2D32f* imagePoints1,
                            CvPoint2D32f* imagePoints2,
                            CvPoint3D32f* objectPoints,
                            CvStereoCamera* stereoparams
                           );


CVAPI(int) icvComputeRestStereoParams(CvStereoCamera *stereoparams);

CVAPI(void) cvComputePerspectiveMap( const double coeffs[3][3], CvArr* rectMapX, CvArr* rectMapY );

CVAPI(int) icvComCoeffForLine(   CvPoint2D64f point1,
                            CvPoint2D64f point2,
                            CvPoint2D64f point3,
                            CvPoint2D64f point4,
                            double*    camMatr1,
                            double*    rotMatr1,
                            double*    transVect1,
                            double*    camMatr2,
                            double*    rotMatr2,
                            double*    transVect2,
                            CvStereoLineCoeff*    coeffs,
                            int* needSwapCameras);

CVAPI(int) icvGetDirectionForPoint(  CvPoint2D64f point,
                                double* camMatr,
                                CvPoint3D64f* direct);

CVAPI(int) icvGetCrossLines(CvPoint3D64f point11,CvPoint3D64f point12,
                       CvPoint3D64f point21,CvPoint3D64f point22,
                       CvPoint3D64f* midPoint);

CVAPI(int) icvComputeStereoLineCoeffs(   CvPoint3D64f pointA,
                                    CvPoint3D64f pointB,
                                    CvPoint3D64f pointCam1,
                                    double gamma,
                                    CvStereoLineCoeff*    coeffs);

/*CVAPI(int) icvComputeFundMatrEpipoles ( double* camMatr1,
                                    double*     rotMatr1,
                                    double*     transVect1,
                                    double*     camMatr2,
                                    double*     rotMatr2,
                                    double*     transVect2,
                                    CvPoint2D64f* epipole1,
                                    CvPoint2D64f* epipole2,
                                    double*     fundMatr);*/

CVAPI(int) icvGetAngleLine( CvPoint2D64f startPoint, CvSize imageSize,CvPoint2D64f *point1,CvPoint2D64f *point2);

CVAPI(void) icvGetCoefForPiece(   CvPoint2D64f p_start,CvPoint2D64f p_end,
                        double *a,double *b,double *c,
                        int* result);

/*CVAPI(void) icvGetCommonArea( CvSize imageSize,
                    CvPoint2D64f epipole1,CvPoint2D64f epipole2,
                    double* fundMatr,
                    double* coeff11,double* coeff12,
                    double* coeff21,double* coeff22,
                    int* result);*/

CVAPI(void) icvComputeeInfiniteProject1(double*    rotMatr,
                                     double*    camMatr1,
                                     double*    camMatr2,
                                     CvPoint2D32f point1,
                                     CvPoint2D32f *point2);

CVAPI(void) icvComputeeInfiniteProject2(double*    rotMatr,
                                     double*    camMatr1,
                                     double*    camMatr2,
                                     CvPoint2D32f* point1,
                                     CvPoint2D32f point2);

CVAPI(void) icvGetCrossDirectDirect(  double* direct1,double* direct2,
                            CvPoint2D64f *cross,int* result);

CVAPI(void) icvGetCrossPieceDirect(   CvPoint2D64f p_start,CvPoint2D64f p_end,
                            double a,double b,double c,
                            CvPoint2D64f *cross,int* result);

CVAPI(void) icvGetCrossPiecePiece( CvPoint2D64f p1_start,CvPoint2D64f p1_end,
                            CvPoint2D64f p2_start,CvPoint2D64f p2_end,
                            CvPoint2D64f* cross,
                            int* result);

CVAPI(void) icvGetPieceLength(CvPoint2D64f point1,CvPoint2D64f point2,double* dist);

CVAPI(void) icvGetCrossRectDirect(    CvSize imageSize,
                            double a,double b,double c,
                            CvPoint2D64f *start,CvPoint2D64f *end,
                            int* result);

CVAPI(void) icvProjectPointToImage(   CvPoint3D64f point,
                            double* camMatr,double* rotMatr,double* transVect,
                            CvPoint2D64f* projPoint);

CVAPI(void) icvGetQuadsTransform( CvSize        imageSize,
                        double*     camMatr1,
                        double*     rotMatr1,
                        double*     transVect1,
                        double*     camMatr2,
                        double*     rotMatr2,
                        double*     transVect2,
                        CvSize*       warpSize,
                        double quad1[4][2],
                        double quad2[4][2],
                        double*     fundMatr,
                        CvPoint3D64f* epipole1,
                        CvPoint3D64f* epipole2
                        );

CVAPI(void) icvGetQuadsTransformStruct(  CvStereoCamera* stereoCamera);

CVAPI(void) icvComputeStereoParamsForCameras(CvStereoCamera* stereoCamera);

CVAPI(void) icvGetCutPiece(   double* areaLineCoef1,double* areaLineCoef2,
                    CvPoint2D64f epipole,
                    CvSize imageSize,
                    CvPoint2D64f* point11,CvPoint2D64f* point12,
                    CvPoint2D64f* point21,CvPoint2D64f* point22,
                    int* result);

CVAPI(void) icvGetMiddleAnglePoint(   CvPoint2D64f basePoint,
                            CvPoint2D64f point1,CvPoint2D64f point2,
                            CvPoint2D64f* midPoint);

CVAPI(void) icvGetNormalDirect(double* direct,CvPoint2D64f point,double* normDirect);

CVAPI(double) icvGetVect(CvPoint2D64f basePoint,CvPoint2D64f point1,CvPoint2D64f point2);

CVAPI(void) icvProjectPointToDirect(  CvPoint2D64f point,double* lineCoeff,
                            CvPoint2D64f* projectPoint);

CVAPI(void) icvGetDistanceFromPointToDirect( CvPoint2D64f point,double* lineCoef,double*dist);

CVAPI(IplImage*) icvCreateIsometricImage( IplImage* src, IplImage* dst,
                              int desired_depth, int desired_num_channels );

CVAPI(void) cvDeInterlace( const CvArr* frame, CvArr* fieldEven, CvArr* fieldOdd );

/*CVAPI(int) icvSelectBestRt(           int           numImages,
                                    int*          numPoints,
                                    CvSize        imageSize,
                                    CvPoint2D32f* imagePoints1,
                                    CvPoint2D32f* imagePoints2,
                                    CvPoint3D32f* objectPoints,

                                    CvMatr32f     cameraMatrix1,
                                    CvVect32f     distortion1,
                                    CvMatr32f     rotMatrs1,
                                    CvVect32f     transVects1,

                                    CvMatr32f     cameraMatrix2,
                                    CvVect32f     distortion2,
                                    CvMatr32f     rotMatrs2,
                                    CvVect32f     transVects2,

                                    CvMatr32f     bestRotMatr,
                                    CvVect32f     bestTransVect
                                    );*/


/****************************************************************************************\
*                                     Contour Tree                                       *
\****************************************************************************************/

/* Contour tree header */
typedef struct CvContourTree
{
    CV_SEQUENCE_FIELDS()
    CvPoint p1;            /* the first point of the binary tree root segment */
    CvPoint p2;            /* the last point of the binary tree root segment */
} CvContourTree;

/* Builds hierarhical representation of a contour */
CVAPI(CvContourTree*)  cvCreateContourTree( const CvSeq* contour,
                                            CvMemStorage* storage,
                                            double threshold );

/* Reconstruct (completelly or partially) contour a from contour tree */
CVAPI(CvSeq*)  cvContourFromContourTree( const CvContourTree* tree,
                                         CvMemStorage* storage,
                                         CvTermCriteria criteria );

/* Compares two contour trees */
enum { CV_CONTOUR_TREES_MATCH_I1 = 1 };

CVAPI(double)  cvMatchContourTrees( const CvContourTree* tree1,
                                    const CvContourTree* tree2,
                                    int method, double threshold );

/****************************************************************************************\
*                                   Contour Morphing                                     *
\****************************************************************************************/

/* finds correspondence between two contours */
CvSeq* cvCalcContoursCorrespondence( const CvSeq* contour1,
                                     const CvSeq* contour2,
                                     CvMemStorage* storage);

/* morphs contours using the pre-calculated correspondence:
   alpha=0 ~ contour1, alpha=1 ~ contour2 */
CvSeq* cvMorphContours( const CvSeq* contour1, const CvSeq* contour2,
                        CvSeq* corr, double alpha,
                        CvMemStorage* storage );


/****************************************************************************************\
*                                   Active Contours                                      *
\****************************************************************************************/

#define  CV_VALUE  1
#define  CV_ARRAY  2
/* Updates active contour in order to minimize its cummulative
   (internal and external) energy. */
CVAPI(void)  cvSnakeImage( const IplImage* image, CvPoint* points,
                           int  length, float* alpha,
                           float* beta, float* gamma,
                           int coeff_usage, CvSize  win,
                           CvTermCriteria criteria, int calc_gradient CV_DEFAULT(1));

/****************************************************************************************\
*                                    Texture Descriptors                                 *
\****************************************************************************************/

#define CV_GLCM_OPTIMIZATION_NONE                   -2
#define CV_GLCM_OPTIMIZATION_LUT                    -1
#define CV_GLCM_OPTIMIZATION_HISTOGRAM              0

#define CV_GLCMDESC_OPTIMIZATION_ALLOWDOUBLENEST    10
#define CV_GLCMDESC_OPTIMIZATION_ALLOWTRIPLENEST    11
#define CV_GLCMDESC_OPTIMIZATION_HISTOGRAM          4

#define CV_GLCMDESC_ENTROPY                         0
#define CV_GLCMDESC_ENERGY                          1
#define CV_GLCMDESC_HOMOGENITY                      2
#define CV_GLCMDESC_CONTRAST                        3
#define CV_GLCMDESC_CLUSTERTENDENCY                 4
#define CV_GLCMDESC_CLUSTERSHADE                    5
#define CV_GLCMDESC_CORRELATION                     6
#define CV_GLCMDESC_CORRELATIONINFO1                7
#define CV_GLCMDESC_CORRELATIONINFO2                8
#define CV_GLCMDESC_MAXIMUMPROBABILITY              9

#define CV_GLCM_ALL                                 0
#define CV_GLCM_GLCM                                1
#define CV_GLCM_DESC                                2

typedef struct CvGLCM CvGLCM;

CVAPI(CvGLCM*) cvCreateGLCM( const IplImage* srcImage,
                                int stepMagnitude,
                                const int* stepDirections CV_DEFAULT(0),
                                int numStepDirections CV_DEFAULT(0),
                                int optimizationType CV_DEFAULT(CV_GLCM_OPTIMIZATION_NONE));

CVAPI(void) cvReleaseGLCM( CvGLCM** GLCM, int flag CV_DEFAULT(CV_GLCM_ALL));

CVAPI(void) cvCreateGLCMDescriptors( CvGLCM* destGLCM,
                                        int descriptorOptimizationType
                                        CV_DEFAULT(CV_GLCMDESC_OPTIMIZATION_ALLOWDOUBLENEST));

CVAPI(double) cvGetGLCMDescriptor( CvGLCM* GLCM, int step, int descriptor );

CVAPI(void) cvGetGLCMDescriptorStatistics( CvGLCM* GLCM, int descriptor,
                                              double* average, double* standardDeviation );

CVAPI(IplImage*) cvCreateGLCMImage( CvGLCM* GLCM, int step );

/****************************************************************************************\
*                                  Face eyes&mouth tracking                              *
\****************************************************************************************/


typedef struct CvFaceTracker CvFaceTracker;

#define CV_NUM_FACE_ELEMENTS    3
enum CV_FACE_ELEMENTS
{
    CV_FACE_MOUTH = 0,
    CV_FACE_LEFT_EYE = 1,
    CV_FACE_RIGHT_EYE = 2
};

CVAPI(CvFaceTracker*) cvInitFaceTracker(CvFaceTracker* pFaceTracking, const IplImage* imgGray,
                                                CvRect* pRects, int nRects);
CVAPI(int) cvTrackFace( CvFaceTracker* pFaceTracker, IplImage* imgGray,
                              CvRect* pRects, int nRects,
                              CvPoint* ptRotate, double* dbAngleRotate);
CVAPI(void) cvReleaseFaceTracker(CvFaceTracker** ppFaceTracker);


typedef struct CvFace
{
    CvRect MouthRect;
    CvRect LeftEyeRect;
    CvRect RightEyeRect;
} CvFaceData;

CvSeq * cvFindFace(IplImage * Image,CvMemStorage* storage);
CvSeq * cvPostBoostingFindFace(IplImage * Image,CvMemStorage* storage);


/****************************************************************************************\
*                                         3D Tracker                                     *
\****************************************************************************************/

typedef unsigned char CvBool;

typedef struct Cv3dTracker2dTrackedObject
{
    int id;
    CvPoint2D32f p; // pgruebele: So we do not loose precision, this needs to be float
} Cv3dTracker2dTrackedObject;

CV_INLINE Cv3dTracker2dTrackedObject cv3dTracker2dTrackedObject(int id, CvPoint2D32f p)
{
    Cv3dTracker2dTrackedObject r;
    r.id = id;
    r.p = p;
    return r;
}

typedef struct Cv3dTrackerTrackedObject
{
    int id;
    CvPoint3D32f p;             // location of the tracked object
} Cv3dTrackerTrackedObject;

CV_INLINE Cv3dTrackerTrackedObject cv3dTrackerTrackedObject(int id, CvPoint3D32f p)
{
    Cv3dTrackerTrackedObject r;
    r.id = id;
    r.p = p;
    return r;
}

typedef struct Cv3dTrackerCameraInfo
{
    CvBool valid;
    float mat[4][4];              /* maps camera coordinates to world coordinates */
    CvPoint2D32f principal_point; /* copied from intrinsics so this structure */
                                  /* has all the info we need */
} Cv3dTrackerCameraInfo;

typedef struct Cv3dTrackerCameraIntrinsics
{
    CvPoint2D32f principal_point;
    float focal_length[2];
    float distortion[4];
} Cv3dTrackerCameraIntrinsics;

CVAPI(CvBool) cv3dTrackerCalibrateCameras(int num_cameras,
                     const Cv3dTrackerCameraIntrinsics camera_intrinsics[], /* size is num_cameras */
                     CvSize etalon_size,
                     float square_size,
                     IplImage *samples[],                                   /* size is num_cameras */
                     Cv3dTrackerCameraInfo camera_info[]);                  /* size is num_cameras */

CVAPI(int)  cv3dTrackerLocateObjects(int num_cameras, int num_objects,
                   const Cv3dTrackerCameraInfo camera_info[],        /* size is num_cameras */
                   const Cv3dTracker2dTrackedObject tracking_info[], /* size is num_objects*num_cameras */
                   Cv3dTrackerTrackedObject tracked_objects[]);      /* size is num_objects */
/****************************************************************************************
 tracking_info is a rectangular array; one row per camera, num_objects elements per row.
 The id field of any unused slots must be -1. Ids need not be ordered or consecutive. On
 completion, the return value is the number of objects located; i.e., the number of objects
 visible by more than one camera. The id field of any unused slots in tracked objects is
 set to -1.
****************************************************************************************/


/****************************************************************************************\
*                           Skeletons and Linear-Contour Models                          *
\****************************************************************************************/

typedef enum CvLeeParameters
{
    CV_LEE_INT = 0,
    CV_LEE_FLOAT = 1,
    CV_LEE_DOUBLE = 2,
    CV_LEE_AUTO = -1,
    CV_LEE_ERODE = 0,
    CV_LEE_ZOOM = 1,
    CV_LEE_NON = 2
} CvLeeParameters;

#define CV_NEXT_VORONOISITE2D( SITE ) ((SITE)->edge[0]->site[((SITE)->edge[0]->site[0] == (SITE))])
#define CV_PREV_VORONOISITE2D( SITE ) ((SITE)->edge[1]->site[((SITE)->edge[1]->site[0] == (SITE))])
#define CV_FIRST_VORONOIEDGE2D( SITE ) ((SITE)->edge[0])
#define CV_LAST_VORONOIEDGE2D( SITE ) ((SITE)->edge[1])
#define CV_NEXT_VORONOIEDGE2D( EDGE, SITE ) ((EDGE)->next[(EDGE)->site[0] != (SITE)])
#define CV_PREV_VORONOIEDGE2D( EDGE, SITE ) ((EDGE)->next[2 + ((EDGE)->site[0] != (SITE))])
#define CV_VORONOIEDGE2D_BEGINNODE( EDGE, SITE ) ((EDGE)->node[((EDGE)->site[0] != (SITE))])
#define CV_VORONOIEDGE2D_ENDNODE( EDGE, SITE ) ((EDGE)->node[((EDGE)->site[0] == (SITE))])
#define CV_TWIN_VORONOISITE2D( SITE, EDGE ) ( (EDGE)->site[((EDGE)->site[0] == (SITE))])

#define CV_VORONOISITE2D_FIELDS()    \
    struct CvVoronoiNode2D *node[2]; \
    struct CvVoronoiEdge2D *edge[2];

typedef struct CvVoronoiSite2D
{
    CV_VORONOISITE2D_FIELDS()
    struct CvVoronoiSite2D *next[2];
} CvVoronoiSite2D;

#define CV_VORONOIEDGE2D_FIELDS()    \
    struct CvVoronoiNode2D *node[2]; \
    struct CvVoronoiSite2D *site[2]; \
    struct CvVoronoiEdge2D *next[4];

typedef struct CvVoronoiEdge2D
{
    CV_VORONOIEDGE2D_FIELDS()
} CvVoronoiEdge2D;

#define CV_VORONOINODE2D_FIELDS()       \
    CV_SET_ELEM_FIELDS(CvVoronoiNode2D) \
    CvPoint2D32f pt;                    \
    float radius;

typedef struct CvVoronoiNode2D
{
    CV_VORONOINODE2D_FIELDS()
} CvVoronoiNode2D;

#define CV_VORONOIDIAGRAM2D_FIELDS() \
    CV_GRAPH_FIELDS()                \
    CvSet *sites;

typedef struct CvVoronoiDiagram2D
{
    CV_VORONOIDIAGRAM2D_FIELDS()
} CvVoronoiDiagram2D;

/* Computes Voronoi Diagram for given polygons with holes */
CVAPI(int)  cvVoronoiDiagramFromContour(CvSeq* ContourSeq,
                                           CvVoronoiDiagram2D** VoronoiDiagram,
                                           CvMemStorage* VoronoiStorage,
                                           CvLeeParameters contour_type CV_DEFAULT(CV_LEE_INT),
                                           int contour_orientation CV_DEFAULT(-1),
                                           int attempt_number CV_DEFAULT(10));

/* Computes Voronoi Diagram for domains in given image */
CVAPI(int)  cvVoronoiDiagramFromImage(IplImage* pImage,
                                         CvSeq** ContourSeq,
                                         CvVoronoiDiagram2D** VoronoiDiagram,
                                         CvMemStorage* VoronoiStorage,
                                         CvLeeParameters regularization_method CV_DEFAULT(CV_LEE_NON),
                                         float approx_precision CV_DEFAULT(CV_LEE_AUTO));

/* Deallocates the storage */
CVAPI(void) cvReleaseVoronoiStorage(CvVoronoiDiagram2D* VoronoiDiagram,
                                          CvMemStorage** pVoronoiStorage);

/*********************** Linear-Contour Model ****************************/

struct CvLCMEdge;
struct CvLCMNode;

typedef struct CvLCMEdge
{
    CV_GRAPH_EDGE_FIELDS()
    CvSeq* chain;
    float width;
    int index1;
    int index2;
} CvLCMEdge;

typedef struct CvLCMNode
{
    CV_GRAPH_VERTEX_FIELDS()
    CvContour* contour;
} CvLCMNode;


/* Computes hybrid model from Voronoi Diagram */
CVAPI(CvGraph*) cvLinearContorModelFromVoronoiDiagram(CvVoronoiDiagram2D* VoronoiDiagram,
                                                         float maxWidth);

/* Releases hybrid model storage */
CVAPI(int) cvReleaseLinearContorModelStorage(CvGraph** Graph);


/* two stereo-related functions */

CVAPI(void) cvInitPerspectiveTransform( CvSize size, const CvPoint2D32f vertex[4], double matrix[3][3],
                                              CvArr* rectMap );

/*CVAPI(void) cvInitStereoRectification( CvStereoCamera* params,
                                             CvArr* rectMap1, CvArr* rectMap2,
                                             int do_undistortion );*/

/*************************** View Morphing Functions ************************/

typedef struct CvMatrix3
{
    float m[3][3];
} CvMatrix3;

/* The order of the function corresponds to the order they should appear in
   the view morphing pipeline */

/* Finds ending points of scanlines on left and right images of stereo-pair */
CVAPI(void)  cvMakeScanlines( const CvMatrix3* matrix, CvSize  img_size,
                              int*  scanlines1, int*  scanlines2,
                              int*  lengths1, int*  lengths2,
                              int*  line_count );

/* Grab pixel values from scanlines and stores them sequentially
   (some sort of perspective image transform) */
CVAPI(void)  cvPreWarpImage( int       line_count,
                             IplImage* img,
                             uchar*    dst,
                             int*      dst_nums,
                             int*      scanlines);

/* Approximate each grabbed scanline by a sequence of runs
   (lossy run-length compression) */
CVAPI(void)  cvFindRuns( int    line_count,
                         uchar* prewarp1,
                         uchar* prewarp2,
                         int*   line_lengths1,
                         int*   line_lengths2,
                         int*   runs1,
                         int*   runs2,
                         int*   num_runs1,
                         int*   num_runs2);

/* Compares two sets of compressed scanlines */
CVAPI(void)  cvDynamicCorrespondMulti( int  line_count,
                                       int* first,
                                       int* first_runs,
                                       int* second,
                                       int* second_runs,
                                       int* first_corr,
                                       int* second_corr);

/* Finds scanline ending coordinates for some intermediate "virtual" camera position */
CVAPI(void)  cvMakeAlphaScanlines( int*  scanlines1,
                                   int*  scanlines2,
                                   int*  scanlinesA,
                                   int*  lengths,
                                   int   line_count,
                                   float alpha);

/* Blends data of the left and right image scanlines to get
   pixel values of "virtual" image scanlines */
CVAPI(void)  cvMorphEpilinesMulti( int    line_count,
                                   uchar* first_pix,
                                   int*   first_num,
                                   uchar* second_pix,
                                   int*   second_num,
                                   uchar* dst_pix,
                                   int*   dst_num,
                                   float  alpha,
                                   int*   first,
                                   int*   first_runs,
                                   int*   second,
                                   int*   second_runs,
                                   int*   first_corr,
                                   int*   second_corr);

/* Does reverse warping of the morphing result to make
   it fill the destination image rectangle */
CVAPI(void)  cvPostWarpImage( int       line_count,
                              uchar*    src,
                              int*      src_nums,
                              IplImage* img,
                              int*      scanlines);

/* Deletes Moire (missed pixels that appear due to discretization) */
CVAPI(void)  cvDeleteMoire( IplImage*  img );


typedef struct CvConDensation
{
    int MP;
    int DP;
    float* DynamMatr;       /* Matrix of the linear Dynamics system  */
    float* State;           /* Vector of State                       */
    int SamplesNum;         /* Number of the Samples                 */
    float** flSamples;      /* arr of the Sample Vectors             */
    float** flNewSamples;   /* temporary array of the Sample Vectors */
    float* flConfidence;    /* Confidence for each Sample            */
    float* flCumulative;    /* Cumulative confidence                 */
    float* Temp;            /* Temporary vector                      */
    float* RandomSample;    /* RandomVector to update sample set     */
    struct CvRandState* RandS; /* Array of structures to generate random vectors */
} CvConDensation;

/* Creates ConDensation filter state */
CVAPI(CvConDensation*)  cvCreateConDensation( int dynam_params,
                                             int measure_params,
                                             int sample_count );

/* Releases ConDensation filter state */
CVAPI(void)  cvReleaseConDensation( CvConDensation** condens );

/* Updates ConDensation filter by time (predict future state of the system) */
CVAPI(void)  cvConDensUpdateByTime( CvConDensation* condens);

/* Initializes ConDensation filter samples  */
CVAPI(void)  cvConDensInitSampleSet( CvConDensation* condens, CvMat* lower_bound, CvMat* upper_bound );

CV_INLINE int iplWidth( const IplImage* img )
{
    return !img ? 0 : !img->roi ? img->width : img->roi->width;
}

CV_INLINE int iplHeight( const IplImage* img )
{
    return !img ? 0 : !img->roi ? img->height : img->roi->height;
}

#ifdef __cplusplus
}
#endif

#ifdef __cplusplus

/****************************************************************************************\
*                                   Calibration engine                                   *
\****************************************************************************************/

typedef enum CvCalibEtalonType
{
    CV_CALIB_ETALON_USER = -1,
    CV_CALIB_ETALON_CHESSBOARD = 0,
    CV_CALIB_ETALON_CHECKERBOARD = CV_CALIB_ETALON_CHESSBOARD
}
CvCalibEtalonType;

class CV_EXPORTS CvCalibFilter
{
public:
    /* Constructor & destructor */
    CvCalibFilter();
    virtual ~CvCalibFilter();

    /* Sets etalon type - one for all cameras.
       etalonParams is used in case of pre-defined etalons (such as chessboard).
       Number of elements in etalonParams is determined by etalonType.
       E.g., if etalon type is CV_ETALON_TYPE_CHESSBOARD then:
         etalonParams[0] is number of squares per one side of etalon
         etalonParams[1] is number of squares per another side of etalon
         etalonParams[2] is linear size of squares in the board in arbitrary units.
       pointCount & points are used in case of
       CV_CALIB_ETALON_USER (user-defined) etalon. */
    virtual bool
        SetEtalon( CvCalibEtalonType etalonType, double* etalonParams,
                   int pointCount = 0, CvPoint2D32f* points = 0 );

    /* Retrieves etalon parameters/or and points */
    virtual CvCalibEtalonType
        GetEtalon( int* paramCount = 0, const double** etalonParams = 0,
                   int* pointCount = 0, const CvPoint2D32f** etalonPoints = 0 ) const;

    /* Sets number of cameras calibrated simultaneously. It is equal to 1 initially */
    virtual void SetCameraCount( int cameraCount );

    /* Retrieves number of cameras */
    int GetCameraCount() const { return cameraCount; }

    /* Starts cameras calibration */
    virtual bool SetFrames( int totalFrames );

    /* Stops cameras calibration */
    virtual void Stop( bool calibrate = false );

    /* Retrieves number of cameras */
    bool IsCalibrated() const { return isCalibrated; }

    /* Feeds another serie of snapshots (one per each camera) to filter.
       Etalon points on these images are found automatically.
       If the function can't locate points, it returns false */
    virtual bool FindEtalon( IplImage** imgs );

    /* The same but takes matrices */
    virtual bool FindEtalon( CvMat** imgs );

    /* Lower-level function for feeding filter with already found etalon points.
       Array of point arrays for each camera is passed. */
    virtual bool Push( const CvPoint2D32f** points = 0 );

    /* Returns total number of accepted frames and, optionally,
       total number of frames to collect */
    virtual int GetFrameCount( int* framesTotal = 0 ) const;

    /* Retrieves camera parameters for specified camera.
       If camera is not calibrated the function returns 0 */
    virtual const CvCamera* GetCameraParams( int idx = 0 ) const;

    virtual const CvStereoCamera* GetStereoParams() const;

    /* Sets camera parameters for all cameras */
    virtual bool SetCameraParams( CvCamera* params );

    /* Saves all camera parameters to file */
    virtual bool SaveCameraParams( const char* filename );

    /* Loads all camera parameters from file */
    virtual bool LoadCameraParams( const char* filename );

    /* Undistorts images using camera parameters. Some of src pointers can be NULL. */
    virtual bool Undistort( IplImage** src, IplImage** dst );

    /* Undistorts images using camera parameters. Some of src pointers can be NULL. */
    virtual bool Undistort( CvMat** src, CvMat** dst );

    /* Returns array of etalon points detected/partally detected
       on the latest frame for idx-th camera */
    virtual bool GetLatestPoints( int idx, CvPoint2D32f** pts,
                                                  int* count, bool* found );

    /* Draw the latest detected/partially detected etalon */
    virtual void DrawPoints( IplImage** dst );

    /* Draw the latest detected/partially detected etalon */
    virtual void DrawPoints( CvMat** dst );

    virtual bool Rectify( IplImage** srcarr, IplImage** dstarr );
    virtual bool Rectify( CvMat** srcarr, CvMat** dstarr );

protected:

    enum { MAX_CAMERAS = 3 };

    /* etalon data */
    CvCalibEtalonType  etalonType;
    int     etalonParamCount;
    double* etalonParams;
    int     etalonPointCount;
    CvPoint2D32f* etalonPoints;
    CvSize  imgSize;
    CvMat*  grayImg;
    CvMat*  tempImg;
    CvMemStorage* storage;

    /* camera data */
    int     cameraCount;
    CvCamera cameraParams[MAX_CAMERAS];
    CvStereoCamera stereo;
    CvPoint2D32f* points[MAX_CAMERAS];
    CvMat*  undistMap[MAX_CAMERAS][2];
    CvMat*  undistImg;
    int     latestCounts[MAX_CAMERAS];
    CvPoint2D32f* latestPoints[MAX_CAMERAS];
    CvMat*  rectMap[MAX_CAMERAS][2];

    /* Added by Valery */
    //CvStereoCamera stereoParams;

    int     maxPoints;
    int     framesTotal;
    int     framesAccepted;
    bool    isCalibrated;
};

#include <iosfwd>
#include <limits>

class CV_EXPORTS CvImage
{
public:
    CvImage() : image(0), refcount(0) {}
    CvImage( CvSize _size, int _depth, int _channels )
    {
        image = cvCreateImage( _size, _depth, _channels );
        refcount = image ? new int(1) : 0;
    }

    CvImage( IplImage* img ) : image(img)
    {
        refcount = image ? new int(1) : 0;
    }

    CvImage( const CvImage& img ) : image(img.image), refcount(img.refcount)
    {
        if( refcount ) ++(*refcount);
    }

    CvImage( const char* filename, const char* imgname=0, int color=-1 ) : image(0), refcount(0)
    { load( filename, imgname, color ); }

    CvImage( CvFileStorage* fs, const char* mapname, const char* imgname ) : image(0), refcount(0)
    { read( fs, mapname, imgname ); }

    CvImage( CvFileStorage* fs, const char* seqname, int idx ) : image(0), refcount(0)
    { read( fs, seqname, idx ); }

    ~CvImage()
    {
        if( refcount && !(--*refcount) )
        {
            cvReleaseImage( &image );
            delete refcount;
        }
    }

    CvImage clone() { return CvImage(image ? cvCloneImage(image) : 0); }

    void create( CvSize _size, int _depth, int _channels )
    {
        if( !image || !refcount ||
           image->width != _size.width || image->height != _size.height ||
           image->depth != _depth || image->nChannels != _channels )
            attach( cvCreateImage( _size, _depth, _channels ));
    }

    void release() { detach(); }
    void clear() { detach(); }

    void attach( IplImage* img, bool use_refcount=true )
    {
        if( refcount && --*refcount == 0 )
        {
            cvReleaseImage( &image );
            delete refcount;
        }
        image = img;
        refcount = use_refcount && image ? new int(1) : 0;
    }

    void detach()
    {
        if( refcount && --*refcount == 0 )
        {
            cvReleaseImage( &image );
            delete refcount;
        }
        image = 0;
        refcount = 0;
    }

    bool load( const char* filename, const char* imgname=0, int color=-1 );
    bool read( CvFileStorage* fs, const char* mapname, const char* imgname );
    bool read( CvFileStorage* fs, const char* seqname, int idx );
    void save( const char* filename, const char* imgname, const int* params=0 );
    void write( CvFileStorage* fs, const char* imgname );

    void show( const char* window_name );
    bool is_valid() { return image != 0; }

    int width() const { return image ? image->width : 0; }
    int height() const { return image ? image->height : 0; }

    CvSize size() const { return image ? cvSize(image->width, image->height) : cvSize(0,0); }

    CvSize roi_size() const
    {
        return !image ? cvSize(0,0) :
        !image->roi ? cvSize(image->width,image->height) :
        cvSize(image->roi->width, image->roi->height);
    }

    CvRect roi() const
    {
        return !image ? cvRect(0,0,0,0) :
        !image->roi ? cvRect(0,0,image->width,image->height) :
        cvRect(image->roi->xOffset,image->roi->yOffset,
               image->roi->width,image->roi->height);
    }

    int coi() const { return !image || !image->roi ? 0 : image->roi->coi; }

    void set_roi(CvRect _roi) { cvSetImageROI(image,_roi); }
    void reset_roi() { cvResetImageROI(image); }
    void set_coi(int _coi) { cvSetImageCOI(image,_coi); }
    int depth() const { return image ? image->depth : 0; }
    int channels() const { return image ? image->nChannels : 0; }
    int pix_size() const { return image ? ((image->depth & 255)>>3)*image->nChannels : 0; }

    uchar* data() { return image ? (uchar*)image->imageData : 0; }
    const uchar* data() const { return image ? (const uchar*)image->imageData : 0; }
    int step() const { return image ? image->widthStep : 0; }
    int origin() const { return image ? image->origin : 0; }

    uchar* roi_row(int y)
    {
        assert(0<=y);
        assert(!image ?
               1 : image->roi ?
               y<image->roi->height : y<image->height);

        return !image ? 0 :
        !image->roi ?
        (uchar*)(image->imageData + y*image->widthStep) :
        (uchar*)(image->imageData + (y+image->roi->yOffset)*image->widthStep +
                 image->roi->xOffset*((image->depth & 255)>>3)*image->nChannels);
    }

    const uchar* roi_row(int y) const
    {
        assert(0<=y);
        assert(!image ?
               1 : image->roi ?
               y<image->roi->height : y<image->height);

        return !image ? 0 :
        !image->roi ?
        (const uchar*)(image->imageData + y*image->widthStep) :
        (const uchar*)(image->imageData + (y+image->roi->yOffset)*image->widthStep +
                       image->roi->xOffset*((image->depth & 255)>>3)*image->nChannels);
    }

    operator const IplImage* () const { return image; }
    operator IplImage* () { return image; }

    CvImage& operator = (const CvImage& img)
    {
        if( img.refcount )
            ++*img.refcount;
        if( refcount && !(--*refcount) )
            cvReleaseImage( &image );
        image=img.image;
        refcount=img.refcount;
        return *this;
    }

protected:
    IplImage* image;
    int* refcount;
};


class CV_EXPORTS CvMatrix
{
public:
    CvMatrix() : matrix(0) {}
    CvMatrix( int _rows, int _cols, int _type )
    { matrix = cvCreateMat( _rows, _cols, _type ); }

    CvMatrix( int _rows, int _cols, int _type, CvMat* hdr,
             void* _data=0, int _step=CV_AUTOSTEP )
    { matrix = cvInitMatHeader( hdr, _rows, _cols, _type, _data, _step ); }

    CvMatrix( int rows, int cols, int type, CvMemStorage* storage, bool alloc_data=true );

    CvMatrix( int _rows, int _cols, int _type, void* _data, int _step=CV_AUTOSTEP )
    { matrix = cvCreateMatHeader( _rows, _cols, _type );
        cvSetData( matrix, _data, _step ); }

    CvMatrix( CvMat* m )
    { matrix = m; }

    CvMatrix( const CvMatrix& m )
    {
        matrix = m.matrix;
        addref();
    }

    CvMatrix( const char* filename, const char* matname=0, int color=-1 ) : matrix(0)
    {  load( filename, matname, color ); }

    CvMatrix( CvFileStorage* fs, const char* mapname, const char* matname ) : matrix(0)
    {  read( fs, mapname, matname ); }

    CvMatrix( CvFileStorage* fs, const char* seqname, int idx ) : matrix(0)
    {  read( fs, seqname, idx ); }

    ~CvMatrix()
    {
        release();
    }

    CvMatrix clone() { return CvMatrix(matrix ? cvCloneMat(matrix) : 0); }

    void set( CvMat* m, bool add_ref )
    {
        release();
        matrix = m;
        if( add_ref )
            addref();
    }

    void create( int _rows, int _cols, int _type )
    {
        if( !matrix || !matrix->refcount ||
           matrix->rows != _rows || matrix->cols != _cols ||
           CV_MAT_TYPE(matrix->type) != _type )
            set( cvCreateMat( _rows, _cols, _type ), false );
    }

    void addref() const
    {
        if( matrix )
        {
            if( matrix->hdr_refcount )
                ++matrix->hdr_refcount;
            else if( matrix->refcount )
                ++*matrix->refcount;
        }
    }

    void release()
    {
        if( matrix )
        {
            if( matrix->hdr_refcount )
            {
                if( --matrix->hdr_refcount == 0 )
                    cvReleaseMat( &matrix );
            }
            else if( matrix->refcount )
            {
                if( --*matrix->refcount == 0 )
                    cvFree( &matrix->refcount );
            }
            matrix = 0;
        }
    }

    void clear()
    {
        release();
    }

    bool load( const char* filename, const char* matname=0, int color=-1 );
    bool read( CvFileStorage* fs, const char* mapname, const char* matname );
    bool read( CvFileStorage* fs, const char* seqname, int idx );
    void save( const char* filename, const char* matname, const int* params=0 );
    void write( CvFileStorage* fs, const char* matname );

    void show( const char* window_name );

    bool is_valid() { return matrix != 0; }

    int rows() const { return matrix ? matrix->rows : 0; }
    int cols() const { return matrix ? matrix->cols : 0; }

    CvSize size() const
    {
        return !matrix ? cvSize(0,0) : cvSize(matrix->rows,matrix->cols);
    }

    int type() const { return matrix ? CV_MAT_TYPE(matrix->type) : 0; }
    int depth() const { return matrix ? CV_MAT_DEPTH(matrix->type) : 0; }
    int channels() const { return matrix ? CV_MAT_CN(matrix->type) : 0; }
    int pix_size() const { return matrix ? CV_ELEM_SIZE(matrix->type) : 0; }

    uchar* data() { return matrix ? matrix->data.ptr : 0; }
    const uchar* data() const { return matrix ? matrix->data.ptr : 0; }
    int step() const { return matrix ? matrix->step : 0; }

    void set_data( void* _data, int _step=CV_AUTOSTEP )
    { cvSetData( matrix, _data, _step ); }

    uchar* row(int i) { return !matrix ? 0 : matrix->data.ptr + i*matrix->step; }
    const uchar* row(int i) const
    { return !matrix ? 0 : matrix->data.ptr + i*matrix->step; }

    operator const CvMat* () const { return matrix; }
    operator CvMat* () { return matrix; }

    CvMatrix& operator = (const CvMatrix& _m)
    {
        _m.addref();
        release();
        matrix = _m.matrix;
        return *this;
    }

protected:
    CvMat* matrix;
};

/****************************************************************************************\
 *                                       CamShiftTracker                                  *
 \****************************************************************************************/

class CV_EXPORTS CvCamShiftTracker
{
public:

    CvCamShiftTracker();
    virtual ~CvCamShiftTracker();

    /**** Characteristics of the object that are calculated by track_object method *****/
    float   get_orientation() const // orientation of the object in degrees
    { return m_box.angle; }
    float   get_length() const // the larger linear size of the object
    { return m_box.size.height; }
    float   get_width() const // the smaller linear size of the object
    { return m_box.size.width; }
    CvPoint2D32f get_center() const // center of the object
    { return m_box.center; }
    CvRect get_window() const // bounding rectangle for the object
    { return m_comp.rect; }

    /*********************** Tracking parameters ************************/
    int     get_threshold() const // thresholding value that applied to back project
    { return m_threshold; }

    int     get_hist_dims( int* dims = 0 ) const // returns number of histogram dimensions and sets
    { return m_hist ? cvGetDims( m_hist->bins, dims ) : 0; }

    int     get_min_ch_val( int channel ) const // get the minimum allowed value of the specified channel
    { return m_min_ch_val[channel]; }

    int     get_max_ch_val( int channel ) const // get the maximum allowed value of the specified channel
    { return m_max_ch_val[channel]; }

    // set initial object rectangle (must be called before initial calculation of the histogram)
    bool    set_window( CvRect window)
    { m_comp.rect = window; return true; }

    bool    set_threshold( int threshold ) // threshold applied to the histogram bins
    { m_threshold = threshold; return true; }

    bool    set_hist_bin_range( int dim, int min_val, int max_val );

    bool    set_hist_dims( int c_dims, int* dims );// set the histogram parameters

    bool    set_min_ch_val( int channel, int val ) // set the minimum allowed value of the specified channel
    { m_min_ch_val[channel] = val; return true; }
    bool    set_max_ch_val( int channel, int val ) // set the maximum allowed value of the specified channel
    { m_max_ch_val[channel] = val; return true; }

    /************************ The processing methods *********************************/
    // update object position
    virtual bool  track_object( const IplImage* cur_frame );

    // update object histogram
    virtual bool  update_histogram( const IplImage* cur_frame );

    // reset histogram
    virtual void  reset_histogram();

    /************************ Retrieving internal data *******************************/
    // get back project image
    virtual IplImage* get_back_project()
    { return m_back_project; }

    float query( int* bin ) const
    { return m_hist ? (float)cvGetRealND(m_hist->bins, bin) : 0.f; }

protected:

    // internal method for color conversion: fills m_color_planes group
    virtual void color_transform( const IplImage* img );

    CvHistogram* m_hist;

    CvBox2D    m_box;
    CvConnectedComp m_comp;

    float      m_hist_ranges_data[CV_MAX_DIM][2];
    float*     m_hist_ranges[CV_MAX_DIM];

    int        m_min_ch_val[CV_MAX_DIM];
    int        m_max_ch_val[CV_MAX_DIM];
    int        m_threshold;

    IplImage*  m_color_planes[CV_MAX_DIM];
    IplImage*  m_back_project;
    IplImage*  m_temp;
    IplImage*  m_mask;
};

/****************************************************************************************\
*                              Expectation - Maximization                                *
\****************************************************************************************/
struct CV_EXPORTS_W_MAP CvEMParams
{
    CvEMParams();
    CvEMParams( int nclusters, int cov_mat_type=cv::EM::COV_MAT_DIAGONAL,
                int start_step=cv::EM::START_AUTO_STEP,
                CvTermCriteria term_crit=cvTermCriteria(CV_TERMCRIT_ITER+CV_TERMCRIT_EPS, 100, FLT_EPSILON),
                const CvMat* probs=0, const CvMat* weights=0, const CvMat* means=0, const CvMat** covs=0 );

    CV_PROP_RW int nclusters;
    CV_PROP_RW int cov_mat_type;
    CV_PROP_RW int start_step;
    const CvMat* probs;
    const CvMat* weights;
    const CvMat* means;
    const CvMat** covs;
    CV_PROP_RW CvTermCriteria term_crit;
};


class CV_EXPORTS_W CvEM : public CvStatModel
{
public:
    // Type of covariation matrices
    enum { COV_MAT_SPHERICAL=cv::EM::COV_MAT_SPHERICAL,
           COV_MAT_DIAGONAL =cv::EM::COV_MAT_DIAGONAL,
           COV_MAT_GENERIC  =cv::EM::COV_MAT_GENERIC };

    // The initial step
    enum { START_E_STEP=cv::EM::START_E_STEP,
           START_M_STEP=cv::EM::START_M_STEP,
           START_AUTO_STEP=cv::EM::START_AUTO_STEP };

    CV_WRAP CvEM();
    CvEM( const CvMat* samples, const CvMat* sampleIdx=0,
          CvEMParams params=CvEMParams(), CvMat* labels=0 );

    virtual ~CvEM();

    virtual bool train( const CvMat* samples, const CvMat* sampleIdx=0,
                        CvEMParams params=CvEMParams(), CvMat* labels=0 );

    virtual float predict( const CvMat* sample, CV_OUT CvMat* probs ) const;

    CV_WRAP CvEM( const cv::Mat& samples, const cv::Mat& sampleIdx=cv::Mat(),
                  CvEMParams params=CvEMParams() );

    CV_WRAP virtual bool train( const cv::Mat& samples,
                                const cv::Mat& sampleIdx=cv::Mat(),
                                CvEMParams params=CvEMParams(),
                                CV_OUT cv::Mat* labels=0 );

    CV_WRAP virtual float predict( const cv::Mat& sample, CV_OUT cv::Mat* probs=0 ) const;
    CV_WRAP virtual double calcLikelihood( const cv::Mat &sample ) const;

    CV_WRAP int getNClusters() const;
    CV_WRAP cv::Mat getMeans() const;
    CV_WRAP void getCovs(CV_OUT std::vector<cv::Mat>& covs) const;
    CV_WRAP cv::Mat getWeights() const;
    CV_WRAP cv::Mat getProbs() const;

    CV_WRAP inline double getLikelihood() const { return emObj.isTrained() ? logLikelihood : DBL_MAX; }

    CV_WRAP virtual void clear();

    int get_nclusters() const;
    const CvMat* get_means() const;
    const CvMat** get_covs() const;
    const CvMat* get_weights() const;
    const CvMat* get_probs() const;

    inline double get_log_likelihood() const { return getLikelihood(); }

    virtual void read( CvFileStorage* fs, CvFileNode* node );
    virtual void write( CvFileStorage* fs, const char* name ) const;

protected:
    void set_mat_hdrs();

    cv::EM emObj;
    cv::Mat probs;
    double logLikelihood;

    CvMat meansHdr;
    std::vector<CvMat> covsHdrs;
    std::vector<CvMat*> covsPtrs;
    CvMat weightsHdr;
    CvMat probsHdr;
};

namespace cv
{

typedef CvEMParams EMParams;
typedef CvEM ExpectationMaximization;

/*!
 The Patch Generator class
 */
class CV_EXPORTS PatchGenerator
{
public:
    PatchGenerator();
    PatchGenerator(double _backgroundMin, double _backgroundMax,
                   double _noiseRange, bool _randomBlur=true,
                   double _lambdaMin=0.6, double _lambdaMax=1.5,
                   double _thetaMin=-CV_PI, double _thetaMax=CV_PI,
                   double _phiMin=-CV_PI, double _phiMax=CV_PI );
    void operator()(const Mat& image, Point2f pt, Mat& patch, Size patchSize, RNG& rng) const;
    void operator()(const Mat& image, const Mat& transform, Mat& patch,
                    Size patchSize, RNG& rng) const;
    void warpWholeImage(const Mat& image, Mat& matT, Mat& buf,
                        CV_OUT Mat& warped, int border, RNG& rng) const;
    void generateRandomTransform(Point2f srcCenter, Point2f dstCenter,
                                 CV_OUT Mat& transform, RNG& rng,
                                 bool inverse=false) const;
    void setAffineParam(double lambda, double theta, double phi);

    double backgroundMin, backgroundMax;
    double noiseRange;
    bool randomBlur;
    double lambdaMin, lambdaMax;
    double thetaMin, thetaMax;
    double phiMin, phiMax;
};


class CV_EXPORTS LDetector
{
public:
    LDetector();
    LDetector(int _radius, int _threshold, int _nOctaves,
              int _nViews, double _baseFeatureSize, double _clusteringDistance);
    void operator()(const Mat& image,
                    CV_OUT std::vector<KeyPoint>& keypoints,
                    int maxCount=0, bool scaleCoords=true) const;
    void operator()(const std::vector<Mat>& pyr,
                    CV_OUT std::vector<KeyPoint>& keypoints,
                    int maxCount=0, bool scaleCoords=true) const;
    void getMostStable2D(const Mat& image, CV_OUT std::vector<KeyPoint>& keypoints,
                         int maxCount, const PatchGenerator& patchGenerator) const;
    void setVerbose(bool verbose);

    void read(const FileNode& node);
    void write(FileStorage& fs, const String& name=String()) const;

    int radius;
    int threshold;
    int nOctaves;
    int nViews;
    bool verbose;

    double baseFeatureSize;
    double clusteringDistance;
};

typedef LDetector YAPE;

class CV_EXPORTS FernClassifier
{
public:
    FernClassifier();
    FernClassifier(const FileNode& node);
    FernClassifier(const std::vector<std::vector<Point2f> >& points,
                   const std::vector<Mat>& refimgs,
                   const std::vector<std::vector<int> >& labels=std::vector<std::vector<int> >(),
                   int _nclasses=0, int _patchSize=PATCH_SIZE,
                   int _signatureSize=DEFAULT_SIGNATURE_SIZE,
                   int _nstructs=DEFAULT_STRUCTS,
                   int _structSize=DEFAULT_STRUCT_SIZE,
                   int _nviews=DEFAULT_VIEWS,
                   int _compressionMethod=COMPRESSION_NONE,
                   const PatchGenerator& patchGenerator=PatchGenerator());
    virtual ~FernClassifier();
    virtual void read(const FileNode& n);
    virtual void write(FileStorage& fs, const String& name=String()) const;
    virtual void trainFromSingleView(const Mat& image,
                                     const std::vector<KeyPoint>& keypoints,
                                     int _patchSize=PATCH_SIZE,
                                     int _signatureSize=DEFAULT_SIGNATURE_SIZE,
                                     int _nstructs=DEFAULT_STRUCTS,
                                     int _structSize=DEFAULT_STRUCT_SIZE,
                                     int _nviews=DEFAULT_VIEWS,
                                     int _compressionMethod=COMPRESSION_NONE,
                                     const PatchGenerator& patchGenerator=PatchGenerator());
    virtual void train(const std::vector<std::vector<Point2f> >& points,
                       const std::vector<Mat>& refimgs,
                       const std::vector<std::vector<int> >& labels=std::vector<std::vector<int> >(),
                       int _nclasses=0, int _patchSize=PATCH_SIZE,
                       int _signatureSize=DEFAULT_SIGNATURE_SIZE,
                       int _nstructs=DEFAULT_STRUCTS,
                       int _structSize=DEFAULT_STRUCT_SIZE,
                       int _nviews=DEFAULT_VIEWS,
                       int _compressionMethod=COMPRESSION_NONE,
                       const PatchGenerator& patchGenerator=PatchGenerator());
    virtual int operator()(const Mat& img, Point2f kpt, std::vector<float>& signature) const;
    virtual int operator()(const Mat& patch, std::vector<float>& signature) const;
    virtual void clear();
    virtual bool empty() const;
    void setVerbose(bool verbose);

    int getClassCount() const;
    int getStructCount() const;
    int getStructSize() const;
    int getSignatureSize() const;
    int getCompressionMethod() const;
    Size getPatchSize() const;

    struct Feature
    {
        uchar x1, y1, x2, y2;
        Feature() : x1(0), y1(0), x2(0), y2(0) {}
        Feature(int _x1, int _y1, int _x2, int _y2)
        : x1((uchar)_x1), y1((uchar)_y1), x2((uchar)_x2), y2((uchar)_y2)
        {}
        template<typename _Tp> bool operator ()(const Mat_<_Tp>& patch) const
        { return patch(y1,x1) > patch(y2, x2); }
    };

    enum
    {
        PATCH_SIZE = 31,
        DEFAULT_STRUCTS = 50,
        DEFAULT_STRUCT_SIZE = 9,
        DEFAULT_VIEWS = 5000,
        DEFAULT_SIGNATURE_SIZE = 176,
        COMPRESSION_NONE = 0,
        COMPRESSION_RANDOM_PROJ = 1,
        COMPRESSION_PCA = 2,
        DEFAULT_COMPRESSION_METHOD = COMPRESSION_NONE
    };

protected:
    virtual void prepare(int _nclasses, int _patchSize, int _signatureSize,
                         int _nstructs, int _structSize,
                         int _nviews, int _compressionMethod);
    virtual void finalize(RNG& rng);
    virtual int getLeaf(int fidx, const Mat& patch) const;

    bool verbose;
    int nstructs;
    int structSize;
    int nclasses;
    int signatureSize;
    int compressionMethod;
    int leavesPerStruct;
    Size patchSize;
    std::vector<Feature> features;
    std::vector<int> classCounters;
    std::vector<float> posteriors;
};


/****************************************************************************************\
 *                                 Calonder Classifier                                    *
 \****************************************************************************************/

struct RTreeNode;

struct CV_EXPORTS BaseKeypoint
{
    int x;
    int y;
    IplImage* image;

    BaseKeypoint()
    : x(0), y(0), image(NULL)
    {}

    BaseKeypoint(int _x, int _y, IplImage* _image)
    : x(_x), y(_y), image(_image)
    {}
};

class CV_EXPORTS RandomizedTree
{
public:
    friend class RTreeClassifier;

    static const uchar PATCH_SIZE = 32;
    static const int DEFAULT_DEPTH = 9;
    static const int DEFAULT_VIEWS = 5000;
    static const size_t DEFAULT_REDUCED_NUM_DIM = 176;
    static float GET_LOWER_QUANT_PERC() { return .03f; }
    static float GET_UPPER_QUANT_PERC() { return .92f; }

    RandomizedTree();
    ~RandomizedTree();

    void train(std::vector<BaseKeypoint> const& base_set, RNG &rng,
               int depth, int views, size_t reduced_num_dim, int num_quant_bits);
    void train(std::vector<BaseKeypoint> const& base_set, RNG &rng,
               PatchGenerator &make_patch, int depth, int views, size_t reduced_num_dim,
               int num_quant_bits);

    // following two funcs are EXPERIMENTAL (do not use unless you know exactly what you do)
    static void quantizeVector(float *vec, int dim, int N, float bnds[2], int clamp_mode=0);
    static void quantizeVector(float *src, int dim, int N, float bnds[2], uchar *dst);

    // patch_data must be a 32x32 array (no row padding)
    float* getPosterior(uchar* patch_data);
    const float* getPosterior(uchar* patch_data) const;
    uchar* getPosterior2(uchar* patch_data);
    const uchar* getPosterior2(uchar* patch_data) const;

    void read(const char* file_name, int num_quant_bits);
    void read(std::istream &is, int num_quant_bits);
    void write(const char* file_name) const;
    void write(std::ostream &os) const;

    int classes() { return classes_; }
    int depth() { return depth_; }

    //void setKeepFloatPosteriors(bool b) { keep_float_posteriors_ = b; }
    void discardFloatPosteriors() { freePosteriors(1); }

    inline void applyQuantization(int num_quant_bits) { makePosteriors2(num_quant_bits); }

    // debug
    void savePosteriors(String url, bool append=false);
    void savePosteriors2(String url, bool append=false);

private:
    int classes_;
    int depth_;
    int num_leaves_;
    std::vector<RTreeNode> nodes_;
    float **posteriors_;        // 16-bytes aligned posteriors
    uchar **posteriors2_;     // 16-bytes aligned posteriors
    std::vector<int> leaf_counts_;

    void createNodes(int num_nodes, RNG &rng);
    void allocPosteriorsAligned(int num_leaves, int num_classes);
    void freePosteriors(int which);    // which: 1=posteriors_, 2=posteriors2_, 3=both
    void init(int classes, int depth, RNG &rng);
    void addExample(int class_id, uchar* patch_data);
    void finalize(size_t reduced_num_dim, int num_quant_bits);
    int getIndex(uchar* patch_data) const;
    inline float* getPosteriorByIndex(int index);
    inline const float* getPosteriorByIndex(int index) const;
    inline uchar* getPosteriorByIndex2(int index);
    inline const uchar* getPosteriorByIndex2(int index) const;
    //void makeRandomMeasMatrix(float *cs_phi, PHI_DISTR_TYPE dt, size_t reduced_num_dim);
    void convertPosteriorsToChar();
    void makePosteriors2(int num_quant_bits);
    void compressLeaves(size_t reduced_num_dim);
    void estimateQuantPercForPosteriors(float perc[2]);
};


inline uchar* getData(IplImage* image)
{
    return reinterpret_cast<uchar*>(image->imageData);
}

inline float* RandomizedTree::getPosteriorByIndex(int index)
{
    return const_cast<float*>(const_cast<const RandomizedTree*>(this)->getPosteriorByIndex(index));
}

inline const float* RandomizedTree::getPosteriorByIndex(int index) const
{
    return posteriors_[index];
}

inline uchar* RandomizedTree::getPosteriorByIndex2(int index)
{
    return const_cast<uchar*>(const_cast<const RandomizedTree*>(this)->getPosteriorByIndex2(index));
}

inline const uchar* RandomizedTree::getPosteriorByIndex2(int index) const
{
    return posteriors2_[index];
}

struct CV_EXPORTS RTreeNode
{
    short offset1, offset2;

    RTreeNode() {}
    RTreeNode(uchar x1, uchar y1, uchar x2, uchar y2)
    : offset1(y1*RandomizedTree::PATCH_SIZE + x1),
    offset2(y2*RandomizedTree::PATCH_SIZE + x2)
    {}

    //! Left child on 0, right child on 1
    inline bool operator() (uchar* patch_data) const
    {
        return patch_data[offset1] > patch_data[offset2];
    }
};

class CV_EXPORTS RTreeClassifier
{
public:
    static const int DEFAULT_TREES = 48;
    static const size_t DEFAULT_NUM_QUANT_BITS = 4;

    RTreeClassifier();
    void train(std::vector<BaseKeypoint> const& base_set,
               RNG &rng,
               int num_trees = RTreeClassifier::DEFAULT_TREES,
               int depth = RandomizedTree::DEFAULT_DEPTH,
               int views = RandomizedTree::DEFAULT_VIEWS,
               size_t reduced_num_dim = RandomizedTree::DEFAULT_REDUCED_NUM_DIM,
               int num_quant_bits = DEFAULT_NUM_QUANT_BITS);
    void train(std::vector<BaseKeypoint> const& base_set,
               RNG &rng,
               PatchGenerator &make_patch,
               int num_trees = RTreeClassifier::DEFAULT_TREES,
               int depth = RandomizedTree::DEFAULT_DEPTH,
               int views = RandomizedTree::DEFAULT_VIEWS,
               size_t reduced_num_dim = RandomizedTree::DEFAULT_REDUCED_NUM_DIM,
               int num_quant_bits = DEFAULT_NUM_QUANT_BITS);

    // sig must point to a memory block of at least classes()*sizeof(float|uchar) bytes
    void getSignature(IplImage *patch, uchar *sig) const;
    void getSignature(IplImage *patch, float *sig) const;
    void getSparseSignature(IplImage *patch, float *sig, float thresh) const;
    // TODO: deprecated in favor of getSignature overload, remove
    void getFloatSignature(IplImage *patch, float *sig) const { getSignature(patch, sig); }

    static int countNonZeroElements(float *vec, int n, double tol=1e-10);
    static inline void safeSignatureAlloc(uchar **sig, int num_sig=1, int sig_len=176);
    static inline uchar* safeSignatureAlloc(int num_sig=1, int sig_len=176);

    inline int classes() const { return classes_; }
    inline int original_num_classes() const { return original_num_classes_; }

    void setQuantization(int num_quant_bits);
    void discardFloatPosteriors();

    void read(const char* file_name);
    void read(std::istream &is);
    void write(const char* file_name) const;
    void write(std::ostream &os) const;

    // experimental and debug
    void saveAllFloatPosteriors(String file_url);
    void saveAllBytePosteriors(String file_url);
    void setFloatPosteriorsFromTextfile_176(String url);
    float countZeroElements();

    std::vector<RandomizedTree> trees_;

private:
    int classes_;
    int num_quant_bits_;
    mutable uchar **posteriors_;
    mutable unsigned short *ptemp_;
    int original_num_classes_;
    bool keep_floats_;
};

/****************************************************************************************\
*                                     One-Way Descriptor                                 *
\****************************************************************************************/

// CvAffinePose: defines a parameterized affine transformation of an image patch.
// An image patch is rotated on angle phi (in degrees), then scaled lambda1 times
// along horizontal and lambda2 times along vertical direction, and then rotated again
// on angle (theta - phi).
class CV_EXPORTS CvAffinePose
{
public:
    float phi;
    float theta;
    float lambda1;
    float lambda2;
};

class CV_EXPORTS OneWayDescriptor
{
public:
    OneWayDescriptor();
    ~OneWayDescriptor();

    // allocates memory for given descriptor parameters
    void Allocate(int pose_count, CvSize size, int nChannels);

    // GenerateSamples: generates affine transformed patches with averaging them over small transformation variations.
    // If external poses and transforms were specified, uses them instead of generating random ones
    // - pose_count: the number of poses to be generated
    // - frontal: the input patch (can be a roi in a larger image)
    // - norm: if nonzero, normalizes the output patch so that the sum of pixel intensities is 1
    void GenerateSamples(int pose_count, IplImage* frontal, int norm = 0);

    // GenerateSamplesFast: generates affine transformed patches with averaging them over small transformation variations.
    // Uses precalculated transformed pca components.
    // - frontal: the input patch (can be a roi in a larger image)
    // - pca_hr_avg: pca average vector
    // - pca_hr_eigenvectors: pca eigenvectors
    // - pca_descriptors: an array of precomputed descriptors of pca components containing their affine transformations
    //   pca_descriptors[0] corresponds to the average, pca_descriptors[1]-pca_descriptors[pca_dim] correspond to eigenvectors
    void GenerateSamplesFast(IplImage* frontal, CvMat* pca_hr_avg,
                             CvMat* pca_hr_eigenvectors, OneWayDescriptor* pca_descriptors);

    // sets the poses and corresponding transforms
    void SetTransforms(CvAffinePose* poses, CvMat** transforms);

    // Initialize: builds a descriptor.
    // - pose_count: the number of poses to build. If poses were set externally, uses them rather than generating random ones
    // - frontal: input patch. Can be a roi in a larger image
    // - feature_name: the feature name to be associated with the descriptor
    // - norm: if 1, the affine transformed patches are normalized so that their sum is 1
    void Initialize(int pose_count, IplImage* frontal, const char* feature_name = 0, int norm = 0);

    // InitializeFast: builds a descriptor using precomputed descriptors of pca components
    // - pose_count: the number of poses to build
    // - frontal: input patch. Can be a roi in a larger image
    // - feature_name: the feature name to be associated with the descriptor
    // - pca_hr_avg: average vector for PCA
    // - pca_hr_eigenvectors: PCA eigenvectors (one vector per row)
    // - pca_descriptors: precomputed descriptors of PCA components, the first descriptor for the average vector
    // followed by the descriptors for eigenvectors
    void InitializeFast(int pose_count, IplImage* frontal, const char* feature_name,
                        CvMat* pca_hr_avg, CvMat* pca_hr_eigenvectors, OneWayDescriptor* pca_descriptors);

    // ProjectPCASample: unwarps an image patch into a vector and projects it into PCA space
    // - patch: input image patch
    // - avg: PCA average vector
    // - eigenvectors: PCA eigenvectors, one per row
    // - pca_coeffs: output PCA coefficients
    void ProjectPCASample(IplImage* patch, CvMat* avg, CvMat* eigenvectors, CvMat* pca_coeffs) const;

    // InitializePCACoeffs: projects all warped patches into PCA space
    // - avg: PCA average vector
    // - eigenvectors: PCA eigenvectors, one per row
    void InitializePCACoeffs(CvMat* avg, CvMat* eigenvectors);

    // EstimatePose: finds the closest match between an input patch and a set of patches with different poses
    // - patch: input image patch
    // - pose_idx: the output index of the closest pose
    // - distance: the distance to the closest pose (L2 distance)
    void EstimatePose(IplImage* patch, int& pose_idx, float& distance) const;

    // EstimatePosePCA: finds the closest match between an input patch and a set of patches with different poses.
    // The distance between patches is computed in PCA space
    // - patch: input image patch
    // - pose_idx: the output index of the closest pose
    // - distance: distance to the closest pose (L2 distance in PCA space)
    // - avg: PCA average vector. If 0, matching without PCA is used
    // - eigenvectors: PCA eigenvectors, one per row
    void EstimatePosePCA(CvArr* patch, int& pose_idx, float& distance, CvMat* avg, CvMat* eigenvalues) const;

    // GetPatchSize: returns the size of each image patch after warping (2 times smaller than the input patch)
    CvSize GetPatchSize() const
    {
        return m_patch_size;
    }

    // GetInputPatchSize: returns the required size of the patch that the descriptor is built from
    // (2 time larger than the patch after warping)
    CvSize GetInputPatchSize() const
    {
        return cvSize(m_patch_size.width*2, m_patch_size.height*2);
    }

    // GetPatch: returns a patch corresponding to specified pose index
    // - index: pose index
    // - return value: the patch corresponding to specified pose index
    IplImage* GetPatch(int index);

    // GetPose: returns a pose corresponding to specified pose index
    // - index: pose index
    // - return value: the pose corresponding to specified pose index
    CvAffinePose GetPose(int index) const;

    // Save: saves all patches with different poses to a specified path
    void Save(const char* path);

    // ReadByName: reads a descriptor from a file storage
    // - fs: file storage
    // - parent: parent node
    // - name: node name
    // - return value: 1 if succeeded, 0 otherwise
    int ReadByName(CvFileStorage* fs, CvFileNode* parent, const char* name);

    // ReadByName: reads a descriptor from a file node
    // - parent: parent node
    // - name: node name
    // - return value: 1 if succeeded, 0 otherwise
    int ReadByName(const FileNode &parent, const char* name);

    // Write: writes a descriptor into a file storage
    // - fs: file storage
    // - name: node name
    void Write(CvFileStorage* fs, const char* name);

    // GetFeatureName: returns a name corresponding to a feature
    const char* GetFeatureName() const;

    // GetCenter: returns the center of the feature
    CvPoint GetCenter() const;

    void SetPCADimHigh(int pca_dim_high) {m_pca_dim_high = pca_dim_high;};
    void SetPCADimLow(int pca_dim_low) {m_pca_dim_low = pca_dim_low;};

    int GetPCADimLow() const;
    int GetPCADimHigh() const;

    CvMat** GetPCACoeffs() const {return m_pca_coeffs;}

protected:
    int m_pose_count; // the number of poses
    CvSize m_patch_size; // size of each image
    IplImage** m_samples; // an array of length m_pose_count containing the patch in different poses
    IplImage* m_input_patch;
    IplImage* m_train_patch;
    CvMat** m_pca_coeffs; // an array of length m_pose_count containing pca decomposition of the patch in different poses
    CvAffinePose* m_affine_poses; // an array of poses
    CvMat** m_transforms; // an array of affine transforms corresponding to poses

    String m_feature_name; // the name of the feature associated with the descriptor
    CvPoint m_center; // the coordinates of the feature (the center of the input image ROI)

    int m_pca_dim_high; // the number of descriptor pca components to use for generating affine poses
    int m_pca_dim_low; // the number of pca components to use for comparison
};


// OneWayDescriptorBase: encapsulates functionality for training/loading a set of one way descriptors
// and finding the nearest closest descriptor to an input feature
class CV_EXPORTS OneWayDescriptorBase
{
public:

    // creates an instance of OneWayDescriptor from a set of training files
    // - patch_size: size of the input (large) patch
    // - pose_count: the number of poses to generate for each descriptor
    // - train_path: path to training files
    // - pca_config: the name of the file that contains PCA for small patches (2 times smaller
    // than patch_size each dimension
    // - pca_hr_config: the name of the file that contains PCA for large patches (of patch_size size)
    // - pca_desc_config: the name of the file that contains descriptors of PCA components
    OneWayDescriptorBase(CvSize patch_size, int pose_count, const char* train_path = 0, const char* pca_config = 0,
                         const char* pca_hr_config = 0, const char* pca_desc_config = 0, int pyr_levels = 1,
                         int pca_dim_high = 100, int pca_dim_low = 100);

    OneWayDescriptorBase(CvSize patch_size, int pose_count, const String &pca_filename, const String &train_path = String(), const String &images_list = String(),
                         float _scale_min = 0.7f, float _scale_max=1.5f, float _scale_step=1.2f, int pyr_levels = 1,
                         int pca_dim_high = 100, int pca_dim_low = 100);


    virtual ~OneWayDescriptorBase();
    void clear ();


    // Allocate: allocates memory for a given number of descriptors
    void Allocate(int train_feature_count);

    // AllocatePCADescriptors: allocates memory for pca descriptors
    void AllocatePCADescriptors();

    // returns patch size
    CvSize GetPatchSize() const {return m_patch_size;};
    // returns the number of poses for each descriptor
    int GetPoseCount() const {return m_pose_count;};

    // returns the number of pyramid levels
    int GetPyrLevels() const {return m_pyr_levels;};

    // returns the number of descriptors
    int GetDescriptorCount() const {return m_train_feature_count;};

    // CreateDescriptorsFromImage: creates descriptors for each of the input features
    // - src: input image
    // - features: input features
    // - pyr_levels: the number of pyramid levels
    void CreateDescriptorsFromImage(IplImage* src, const std::vector<KeyPoint>& features);

    // CreatePCADescriptors: generates descriptors for PCA components, needed for fast generation of feature descriptors
    void CreatePCADescriptors();

    // returns a feature descriptor by feature index
    const OneWayDescriptor* GetDescriptor(int desc_idx) const {return &m_descriptors[desc_idx];};

    // FindDescriptor: finds the closest descriptor
    // - patch: input image patch
    // - desc_idx: output index of the closest descriptor to the input patch
    // - pose_idx: output index of the closest pose of the closest descriptor to the input patch
    // - distance: distance from the input patch to the closest feature pose
    // - _scales: scales of the input patch for each descriptor
    // - scale_ranges: input scales variation (float[2])
    void FindDescriptor(IplImage* patch, int& desc_idx, int& pose_idx, float& distance, float* _scale = 0, float* scale_ranges = 0) const;

    // - patch: input image patch
    // - n: number of the closest indexes
    // - desc_idxs: output indexes of the closest descriptor to the input patch (n)
    // - pose_idx: output indexes of the closest pose of the closest descriptor to the input patch (n)
    // - distances: distance from the input patch to the closest feature pose (n)
    // - _scales: scales of the input patch
    // - scale_ranges: input scales variation (float[2])
    void FindDescriptor(IplImage* patch, int n, std::vector<int>& desc_idxs, std::vector<int>& pose_idxs,
                        std::vector<float>& distances, std::vector<float>& _scales, float* scale_ranges = 0) const;

    // FindDescriptor: finds the closest descriptor
    // - src: input image
    // - pt: center of the feature
    // - desc_idx: output index of the closest descriptor to the input patch
    // - pose_idx: output index of the closest pose of the closest descriptor to the input patch
    // - distance: distance from the input patch to the closest feature pose
    void FindDescriptor(IplImage* src, cv::Point2f pt, int& desc_idx, int& pose_idx, float& distance) const;

    // InitializePoses: generates random poses
    void InitializePoses();

    // InitializeTransformsFromPoses: generates 2x3 affine matrices from poses (initializes m_transforms)
    void InitializeTransformsFromPoses();

    // InitializePoseTransforms: subsequently calls InitializePoses and InitializeTransformsFromPoses
    void InitializePoseTransforms();

    // InitializeDescriptor: initializes a descriptor
    // - desc_idx: descriptor index
    // - train_image: image patch (ROI is supported)
    // - feature_label: feature textual label
    void InitializeDescriptor(int desc_idx, IplImage* train_image, const char* feature_label);

    void InitializeDescriptor(int desc_idx, IplImage* train_image, const KeyPoint& keypoint, const char* feature_label);

    // InitializeDescriptors: load features from an image and create descriptors for each of them
    void InitializeDescriptors(IplImage* train_image, const std::vector<KeyPoint>& features,
                               const char* feature_label = "", int desc_start_idx = 0);

    // Write: writes this object to a file storage
    // - fs: output filestorage
    void Write (FileStorage &fs) const;

    // Read: reads OneWayDescriptorBase object from a file node
    // - fn: input file node
    void Read (const FileNode &fn);

    // LoadPCADescriptors: loads PCA descriptors from a file
    // - filename: input filename
    int LoadPCADescriptors(const char* filename);

    // LoadPCADescriptors: loads PCA descriptors from a file node
    // - fn: input file node
    int LoadPCADescriptors(const FileNode &fn);

    // SavePCADescriptors: saves PCA descriptors to a file
    // - filename: output filename
    void SavePCADescriptors(const char* filename);

    // SavePCADescriptors: saves PCA descriptors to a file storage
    // - fs: output file storage
    void SavePCADescriptors(CvFileStorage* fs) const;

    // GeneratePCA: calculate and save PCA components and descriptors
    // - img_path: path to training PCA images directory
    // - images_list: filename with filenames of training PCA images
    void GeneratePCA(const char* img_path, const char* images_list, int pose_count=500);

    // SetPCAHigh: sets the high resolution pca matrices (copied to internal structures)
    void SetPCAHigh(CvMat* avg, CvMat* eigenvectors);

    // SetPCALow: sets the low resolution pca matrices (copied to internal structures)
    void SetPCALow(CvMat* avg, CvMat* eigenvectors);

    int GetLowPCA(CvMat** avg, CvMat** eigenvectors)
    {
        *avg = m_pca_avg;
        *eigenvectors = m_pca_eigenvectors;
        return m_pca_dim_low;
    };

    int GetPCADimLow() const {return m_pca_dim_low;};
    int GetPCADimHigh() const {return m_pca_dim_high;};

    void ConvertDescriptorsArrayToTree(); // Converting pca_descriptors array to KD tree

    // GetPCAFilename: get default PCA filename
    static String GetPCAFilename () { return "pca.yml"; }

    virtual bool empty() const { return m_train_feature_count <= 0 ? true : false; }

protected:
    CvSize m_patch_size; // patch size
    int m_pose_count; // the number of poses for each descriptor
    int m_train_feature_count; // the number of the training features
    OneWayDescriptor* m_descriptors; // array of train feature descriptors
    CvMat* m_pca_avg; // PCA average Vector for small patches
    CvMat* m_pca_eigenvectors; // PCA eigenvectors for small patches
    CvMat* m_pca_hr_avg; // PCA average Vector for large patches
    CvMat* m_pca_hr_eigenvectors; // PCA eigenvectors for large patches
    OneWayDescriptor* m_pca_descriptors; // an array of PCA descriptors

    cv::flann::Index* m_pca_descriptors_tree;
    CvMat* m_pca_descriptors_matrix;

    CvAffinePose* m_poses; // array of poses
    CvMat** m_transforms; // array of affine transformations corresponding to poses

    int m_pca_dim_high;
    int m_pca_dim_low;

    int m_pyr_levels;
    float scale_min;
    float scale_max;
    float scale_step;

    // SavePCAall: saves PCA components and descriptors to a file storage
    // - fs: output file storage
    void SavePCAall (FileStorage &fs) const;

    // LoadPCAall: loads PCA components and descriptors from a file node
    // - fn: input file node
    void LoadPCAall (const FileNode &fn);
};

class CV_EXPORTS OneWayDescriptorObject : public OneWayDescriptorBase
{
public:
    // creates an instance of OneWayDescriptorObject from a set of training files
    // - patch_size: size of the input (large) patch
    // - pose_count: the number of poses to generate for each descriptor
    // - train_path: path to training files
    // - pca_config: the name of the file that contains PCA for small patches (2 times smaller
    // than patch_size each dimension
    // - pca_hr_config: the name of the file that contains PCA for large patches (of patch_size size)
    // - pca_desc_config: the name of the file that contains descriptors of PCA components
    OneWayDescriptorObject(CvSize patch_size, int pose_count, const char* train_path, const char* pca_config,
                           const char* pca_hr_config = 0, const char* pca_desc_config = 0, int pyr_levels = 1);

    OneWayDescriptorObject(CvSize patch_size, int pose_count, const String &pca_filename,
                           const String &train_path = String (), const String &images_list = String (),
                           float _scale_min = 0.7f, float _scale_max=1.5f, float _scale_step=1.2f, int pyr_levels = 1);


    virtual ~OneWayDescriptorObject();

    // Allocate: allocates memory for a given number of features
    // - train_feature_count: the total number of features
    // - object_feature_count: the number of features extracted from the object
    void Allocate(int train_feature_count, int object_feature_count);


    void SetLabeledFeatures(const std::vector<KeyPoint>& features) {m_train_features = features;};
    std::vector<KeyPoint>& GetLabeledFeatures() {return m_train_features;};
    const std::vector<KeyPoint>& GetLabeledFeatures() const {return m_train_features;};
    std::vector<KeyPoint> _GetLabeledFeatures() const;

    // IsDescriptorObject: returns 1 if descriptor with specified index is positive, otherwise 0
    int IsDescriptorObject(int desc_idx) const;

    // MatchPointToPart: returns the part number of a feature if it matches one of the object parts, otherwise -1
    int MatchPointToPart(CvPoint pt) const;

    // GetDescriptorPart: returns the part number of the feature corresponding to a specified descriptor
    // - desc_idx: descriptor index
    int GetDescriptorPart(int desc_idx) const;


    void InitializeObjectDescriptors(IplImage* train_image, const std::vector<KeyPoint>& features,
                                     const char* feature_label, int desc_start_idx = 0, float scale = 1.0f,
                                     int is_background = 0);

    // GetObjectFeatureCount: returns the number of object features
    int GetObjectFeatureCount() const {return m_object_feature_count;};

protected:
    int* m_part_id; // contains part id for each of object descriptors
    std::vector<KeyPoint> m_train_features; // train features
    int m_object_feature_count; // the number of the positive features

};


/*
 *  OneWayDescriptorMatcher
 */
class OneWayDescriptorMatcher;
typedef OneWayDescriptorMatcher OneWayDescriptorMatch;

class CV_EXPORTS OneWayDescriptorMatcher : public GenericDescriptorMatcher
{
public:
    class CV_EXPORTS Params
    {
    public:
        static const int POSE_COUNT = 500;
        static const int PATCH_WIDTH = 24;
        static const int PATCH_HEIGHT = 24;
        static float GET_MIN_SCALE() { return 0.7f; }
        static float GET_MAX_SCALE() { return 1.5f; }
        static float GET_STEP_SCALE() { return 1.2f; }

        Params( int poseCount = POSE_COUNT,
               Size patchSize = Size(PATCH_WIDTH, PATCH_HEIGHT),
               String pcaFilename = String(),
               String trainPath = String(), String trainImagesList = String(),
               float minScale = GET_MIN_SCALE(), float maxScale = GET_MAX_SCALE(),
               float stepScale = GET_STEP_SCALE() );

        int poseCount;
        Size patchSize;
        String pcaFilename;
        String trainPath;
        String trainImagesList;

        float minScale, maxScale, stepScale;
    };

    OneWayDescriptorMatcher( const Params& params=Params() );
    virtual ~OneWayDescriptorMatcher();

    void initialize( const Params& params, const Ptr<OneWayDescriptorBase>& base=Ptr<OneWayDescriptorBase>() );

    // Clears keypoints storing in collection and OneWayDescriptorBase
    virtual void clear();

    virtual void train();

    virtual bool isMaskSupported();

    virtual void read( const FileNode &fn );
    virtual void write( FileStorage& fs ) const;

    virtual bool empty() const;

    virtual Ptr<GenericDescriptorMatcher> clone( bool emptyTrainData=false ) const;

protected:
    // Matches a set of keypoints from a single image of the training set. A rectangle with a center in a keypoint
    // and size (patch_width/2*scale, patch_height/2*scale) is cropped from the source image for each
    // keypoint. scale is iterated from DescriptorOneWayParams::min_scale to DescriptorOneWayParams::max_scale.
    // The minimum distance to each training patch with all its affine poses is found over all scales.
    // The class ID of a match is returned for each keypoint. The distance is calculated over PCA components
    // loaded with DescriptorOneWay::Initialize, kd tree is used for finding minimum distances.
    virtual void knnMatchImpl( const Mat& queryImage, std::vector<KeyPoint>& queryKeypoints,
                              std::vector<std::vector<DMatch> >& matches, int k,
                              const std::vector<Mat>& masks, bool compactResult );
    virtual void radiusMatchImpl( const Mat& queryImage, std::vector<KeyPoint>& queryKeypoints,
                                 std::vector<std::vector<DMatch> >& matches, float maxDistance,
                                 const std::vector<Mat>& masks, bool compactResult );

    Ptr<OneWayDescriptorBase> base;
    Params params;
    int prevTrainCount;
};

/*
 *  FernDescriptorMatcher
 */
class FernDescriptorMatcher;
typedef FernDescriptorMatcher FernDescriptorMatch;

class CV_EXPORTS FernDescriptorMatcher : public GenericDescriptorMatcher
{
public:
    class CV_EXPORTS Params
    {
    public:
        Params( int nclasses=0,
               int patchSize=FernClassifier::PATCH_SIZE,
               int signatureSize=FernClassifier::DEFAULT_SIGNATURE_SIZE,
               int nstructs=FernClassifier::DEFAULT_STRUCTS,
               int structSize=FernClassifier::DEFAULT_STRUCT_SIZE,
               int nviews=FernClassifier::DEFAULT_VIEWS,
               int compressionMethod=FernClassifier::COMPRESSION_NONE,
               const PatchGenerator& patchGenerator=PatchGenerator() );

        Params( const String& filename );

        int nclasses;
        int patchSize;
        int signatureSize;
        int nstructs;
        int structSize;
        int nviews;
        int compressionMethod;
        PatchGenerator patchGenerator;

        String filename;
    };

    FernDescriptorMatcher( const Params& params=Params() );
    virtual ~FernDescriptorMatcher();

    virtual void clear();

    virtual void train();

    virtual bool isMaskSupported();

    virtual void read( const FileNode &fn );
    virtual void write( FileStorage& fs ) const;
    virtual bool empty() const;

    virtual Ptr<GenericDescriptorMatcher> clone( bool emptyTrainData=false ) const;

protected:
    virtual void knnMatchImpl( const Mat& queryImage, std::vector<KeyPoint>& queryKeypoints,
                              std::vector<std::vector<DMatch> >& matches, int k,
                              const std::vector<Mat>& masks, bool compactResult );
    virtual void radiusMatchImpl( const Mat& queryImage, std::vector<KeyPoint>& queryKeypoints,
                                 std::vector<std::vector<DMatch> >& matches, float maxDistance,
                                 const std::vector<Mat>& masks, bool compactResult );

    void trainFernClassifier();
    void calcBestProbAndMatchIdx( const Mat& image, const Point2f& pt,
                                 float& bestProb, int& bestMatchIdx, std::vector<float>& signature );
    Ptr<FernClassifier> classifier;
    Params params;
    int prevTrainCount;
};


/*
 * CalonderDescriptorExtractor
 */
template<typename T>
class CV_EXPORTS CalonderDescriptorExtractor : public DescriptorExtractor
{
public:
    CalonderDescriptorExtractor( const String& classifierFile );

    virtual void read( const FileNode &fn );
    virtual void write( FileStorage &fs ) const;

    virtual int descriptorSize() const { return classifier_.classes(); }
    virtual int descriptorType() const { return DataType<T>::type; }

    virtual bool empty() const;

protected:
    virtual void computeImpl( const Mat& image, std::vector<KeyPoint>& keypoints, Mat& descriptors ) const;

    RTreeClassifier classifier_;
    static const int BORDER_SIZE = 16;
};

template<typename T>
CalonderDescriptorExtractor<T>::CalonderDescriptorExtractor(const String& classifier_file)
{
    classifier_.read( classifier_file.c_str() );
}

template<typename T>
void CalonderDescriptorExtractor<T>::computeImpl( const Mat& image,
                                                 std::vector<KeyPoint>& keypoints,
                                                 Mat& descriptors) const
{
    // Cannot compute descriptors for keypoints on the image border.
    KeyPointsFilter::runByImageBorder(keypoints, image.size(), BORDER_SIZE);

    /// @todo Check 16-byte aligned
    descriptors.create((int)keypoints.size(), classifier_.classes(), cv::DataType<T>::type);

    int patchSize = RandomizedTree::PATCH_SIZE;
    int offset = patchSize / 2;
    for (size_t i = 0; i < keypoints.size(); ++i)
    {
        cv::Point2f pt = keypoints[i].pt;
        IplImage ipl = image( Rect((int)(pt.x - offset), (int)(pt.y - offset), patchSize, patchSize) );
        classifier_.getSignature( &ipl, descriptors.ptr<T>((int)i));
    }
}

template<typename T>
void CalonderDescriptorExtractor<T>::read( const FileNode& )
{}

template<typename T>
void CalonderDescriptorExtractor<T>::write( FileStorage& ) const
{}

template<typename T>
bool CalonderDescriptorExtractor<T>::empty() const
{
    return classifier_.trees_.empty();
}


////////////////////// Brute Force Matcher //////////////////////////

template<class Distance>
class CV_EXPORTS BruteForceMatcher : public BFMatcher
{
public:
    BruteForceMatcher( Distance d = Distance() ) : BFMatcher(Distance::normType, false) {(void)d;}
    virtual ~BruteForceMatcher() {}
};


/****************************************************************************************\
*                                Planar Object Detection                                 *
\****************************************************************************************/

class CV_EXPORTS PlanarObjectDetector
{
public:
    PlanarObjectDetector();
    PlanarObjectDetector(const FileNode& node);
    PlanarObjectDetector(const std::vector<Mat>& pyr, int _npoints=300,
                         int _patchSize=FernClassifier::PATCH_SIZE,
                         int _nstructs=FernClassifier::DEFAULT_STRUCTS,
                         int _structSize=FernClassifier::DEFAULT_STRUCT_SIZE,
                         int _nviews=FernClassifier::DEFAULT_VIEWS,
                         const LDetector& detector=LDetector(),
                         const PatchGenerator& patchGenerator=PatchGenerator());
    virtual ~PlanarObjectDetector();
    virtual void train(const std::vector<Mat>& pyr, int _npoints=300,
                       int _patchSize=FernClassifier::PATCH_SIZE,
                       int _nstructs=FernClassifier::DEFAULT_STRUCTS,
                       int _structSize=FernClassifier::DEFAULT_STRUCT_SIZE,
                       int _nviews=FernClassifier::DEFAULT_VIEWS,
                       const LDetector& detector=LDetector(),
                       const PatchGenerator& patchGenerator=PatchGenerator());
    virtual void train(const std::vector<Mat>& pyr, const std::vector<KeyPoint>& keypoints,
                       int _patchSize=FernClassifier::PATCH_SIZE,
                       int _nstructs=FernClassifier::DEFAULT_STRUCTS,
                       int _structSize=FernClassifier::DEFAULT_STRUCT_SIZE,
                       int _nviews=FernClassifier::DEFAULT_VIEWS,
                       const LDetector& detector=LDetector(),
                       const PatchGenerator& patchGenerator=PatchGenerator());
    Rect getModelROI() const;
    std::vector<KeyPoint> getModelPoints() const;
    const LDetector& getDetector() const;
    const FernClassifier& getClassifier() const;
    void setVerbose(bool verbose);

    void read(const FileNode& node);
    void write(FileStorage& fs, const String& name=String()) const;
    bool operator()(const Mat& image, CV_OUT Mat& H, CV_OUT std::vector<Point2f>& corners) const;
    bool operator()(const std::vector<Mat>& pyr, const std::vector<KeyPoint>& keypoints,
                    CV_OUT Mat& H, CV_OUT std::vector<Point2f>& corners,
                    CV_OUT std::vector<int>* pairs=0) const;

protected:
    bool verbose;
    Rect modelROI;
    std::vector<KeyPoint> modelPoints;
    LDetector ldetector;
    FernClassifier fernClassifier;
};

}

// 2009-01-12, Xavier Delacour <xavier.delacour@gmail.com>

struct lsh_hash {
    int h1, h2;
};

struct CvLSHOperations
{
    virtual ~CvLSHOperations() {}

    virtual int vector_add(const void* data) = 0;
    virtual void vector_remove(int i) = 0;
    virtual const void* vector_lookup(int i) = 0;
    virtual void vector_reserve(int n) = 0;
    virtual unsigned int vector_count() = 0;

    virtual void hash_insert(lsh_hash h, int l, int i) = 0;
    virtual void hash_remove(lsh_hash h, int l, int i) = 0;
    virtual int hash_lookup(lsh_hash h, int l, int* ret_i, int ret_i_max) = 0;
};

#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Splits color or grayscale image into multiple connected components
 of nearly the same color/brightness using modification of Burt algorithm.
 comp with contain a pointer to sequence (CvSeq)
 of connected components (CvConnectedComp) */
CVAPI(void) cvPyrSegmentation( IplImage* src, IplImage* dst,
                              CvMemStorage* storage, CvSeq** comp,
                              int level, double threshold1,
                              double threshold2 );

/****************************************************************************************\
*                              Planar subdivisions                                       *
\****************************************************************************************/

typedef size_t CvSubdiv2DEdge;

#define CV_QUADEDGE2D_FIELDS()     \
    int flags;                     \
    struct CvSubdiv2DPoint* pt[4]; \
    CvSubdiv2DEdge  next[4];

#define CV_SUBDIV2D_POINT_FIELDS()\
    int            flags;      \
    CvSubdiv2DEdge first;      \
    CvPoint2D32f   pt;         \
    int id;

#define CV_SUBDIV2D_VIRTUAL_POINT_FLAG (1 << 30)

typedef struct CvQuadEdge2D
{
    CV_QUADEDGE2D_FIELDS()
}
CvQuadEdge2D;

typedef struct CvSubdiv2DPoint
{
    CV_SUBDIV2D_POINT_FIELDS()
}
CvSubdiv2DPoint;

#define CV_SUBDIV2D_FIELDS()    \
    CV_GRAPH_FIELDS()           \
    int  quad_edges;            \
    int  is_geometry_valid;     \
    CvSubdiv2DEdge recent_edge; \
    CvPoint2D32f  topleft;      \
    CvPoint2D32f  bottomright;

typedef struct CvSubdiv2D
{
    CV_SUBDIV2D_FIELDS()
}
CvSubdiv2D;

typedef enum CvSubdiv2DPointLocation
{
    CV_PTLOC_ERROR = -2,
    CV_PTLOC_OUTSIDE_RECT = -1,
    CV_PTLOC_INSIDE = 0,
    CV_PTLOC_VERTEX = 1,
    CV_PTLOC_ON_EDGE = 2
}
CvSubdiv2DPointLocation;

typedef enum CvNextEdgeType
{
    CV_NEXT_AROUND_ORG   = 0x00,
    CV_NEXT_AROUND_DST   = 0x22,
    CV_PREV_AROUND_ORG   = 0x11,
    CV_PREV_AROUND_DST   = 0x33,
    CV_NEXT_AROUND_LEFT  = 0x13,
    CV_NEXT_AROUND_RIGHT = 0x31,
    CV_PREV_AROUND_LEFT  = 0x20,
    CV_PREV_AROUND_RIGHT = 0x02
}
CvNextEdgeType;

/* get the next edge with the same origin point (counterwise) */
#define  CV_SUBDIV2D_NEXT_EDGE( edge )  (((CvQuadEdge2D*)((edge) & ~3))->next[(edge)&3])


/* Initializes Delaunay triangulation */
CVAPI(void)  cvInitSubdivDelaunay2D( CvSubdiv2D* subdiv, CvRect rect );

/* Creates new subdivision */
CVAPI(CvSubdiv2D*)  cvCreateSubdiv2D( int subdiv_type, int header_size,
                                     int vtx_size, int quadedge_size,
                                     CvMemStorage* storage );

/************************* high-level subdivision functions ***************************/

/* Simplified Delaunay diagram creation */
CV_INLINE  CvSubdiv2D* cvCreateSubdivDelaunay2D( CvRect rect, CvMemStorage* storage )
{
    CvSubdiv2D* subdiv = cvCreateSubdiv2D( CV_SEQ_KIND_SUBDIV2D, sizeof(*subdiv),
                                          sizeof(CvSubdiv2DPoint), sizeof(CvQuadEdge2D), storage );

    cvInitSubdivDelaunay2D( subdiv, rect );
    return subdiv;
}


/* Inserts new point to the Delaunay triangulation */
CVAPI(CvSubdiv2DPoint*)  cvSubdivDelaunay2DInsert( CvSubdiv2D* subdiv, CvPoint2D32f pt);

/* Locates a point within the Delaunay triangulation (finds the edge
 the point is left to or belongs to, or the triangulation point the given
 point coinsides with */
CVAPI(CvSubdiv2DPointLocation)  cvSubdiv2DLocate(
                                                 CvSubdiv2D* subdiv, CvPoint2D32f pt,
                                                 CvSubdiv2DEdge* edge,
                                                 CvSubdiv2DPoint** vertex CV_DEFAULT(NULL) );

/* Calculates Voronoi tesselation (i.e. coordinates of Voronoi points) */
CVAPI(void)  cvCalcSubdivVoronoi2D( CvSubdiv2D* subdiv );


/* Removes all Voronoi points from the tesselation */
CVAPI(void)  cvClearSubdivVoronoi2D( CvSubdiv2D* subdiv );


/* Finds the nearest to the given point vertex in subdivision. */
CVAPI(CvSubdiv2DPoint*) cvFindNearestPoint2D( CvSubdiv2D* subdiv, CvPoint2D32f pt );


/************ Basic quad-edge navigation and operations ************/

CV_INLINE  CvSubdiv2DEdge  cvSubdiv2DNextEdge( CvSubdiv2DEdge edge )
{
    return  CV_SUBDIV2D_NEXT_EDGE(edge);
}


CV_INLINE  CvSubdiv2DEdge  cvSubdiv2DRotateEdge( CvSubdiv2DEdge edge, int rotate )
{
    return  (edge & ~3) + ((edge + rotate) & 3);
}

CV_INLINE  CvSubdiv2DEdge  cvSubdiv2DSymEdge( CvSubdiv2DEdge edge )
{
    return edge ^ 2;
}

CV_INLINE  CvSubdiv2DEdge  cvSubdiv2DGetEdge( CvSubdiv2DEdge edge, CvNextEdgeType type )
{
    CvQuadEdge2D* e = (CvQuadEdge2D*)(edge & ~3);
    edge = e->next[(edge + (int)type) & 3];
    return  (edge & ~3) + ((edge + ((int)type >> 4)) & 3);
}


CV_INLINE  CvSubdiv2DPoint*  cvSubdiv2DEdgeOrg( CvSubdiv2DEdge edge )
{
    CvQuadEdge2D* e = (CvQuadEdge2D*)(edge & ~3);
    return (CvSubdiv2DPoint*)e->pt[edge & 3];
}


CV_INLINE  CvSubdiv2DPoint*  cvSubdiv2DEdgeDst( CvSubdiv2DEdge edge )
{
    CvQuadEdge2D* e = (CvQuadEdge2D*)(edge & ~3);
    return (CvSubdiv2DPoint*)e->pt[(edge + 2) & 3];
}

/****************************************************************************************\
*                           Additional operations on Subdivisions                        *
\****************************************************************************************/

// paints voronoi diagram: just demo function
CVAPI(void)  icvDrawMosaic( CvSubdiv2D* subdiv, IplImage* src, IplImage* dst );

// checks planar subdivision for correctness. It is not an absolute check,
// but it verifies some relations between quad-edges
CVAPI(int)   icvSubdiv2DCheck( CvSubdiv2D* subdiv );

// returns squared distance between two 2D points with floating-point coordinates.
CV_INLINE double icvSqDist2D32f( CvPoint2D32f pt1, CvPoint2D32f pt2 )
{
    double dx = pt1.x - pt2.x;
    double dy = pt1.y - pt2.y;

    return dx*dx + dy*dy;
}




CV_INLINE  double  cvTriangleArea( CvPoint2D32f a, CvPoint2D32f b, CvPoint2D32f c )
{
    return ((double)b.x - a.x) * ((double)c.y - a.y) - ((double)b.y - a.y) * ((double)c.x - a.x);
}


/* Constructs kd-tree from set of feature descriptors */
CVAPI(struct CvFeatureTree*) cvCreateKDTree(CvMat* desc);

/* Constructs spill-tree from set of feature descriptors */
CVAPI(struct CvFeatureTree*) cvCreateSpillTree( const CvMat* raw_data,
                                               const int naive CV_DEFAULT(50),
                                               const double rho CV_DEFAULT(.7),
                                               const double tau CV_DEFAULT(.1) );

/* Release feature tree */
CVAPI(void) cvReleaseFeatureTree(struct CvFeatureTree* tr);

/* Searches feature tree for k nearest neighbors of given reference points,
 searching (in case of kd-tree/bbf) at most emax leaves. */
CVAPI(void) cvFindFeatures(struct CvFeatureTree* tr, const CvMat* query_points,
                           CvMat* indices, CvMat* dist, int k, int emax CV_DEFAULT(20));

/* Search feature tree for all points that are inlier to given rect region.
 Only implemented for kd trees */
CVAPI(int) cvFindFeaturesBoxed(struct CvFeatureTree* tr,
                               CvMat* bounds_min, CvMat* bounds_max,
                               CvMat* out_indices);


/* Construct a Locality Sensitive Hash (LSH) table, for indexing d-dimensional vectors of
 given type. Vectors will be hashed L times with k-dimensional p-stable (p=2) functions. */
CVAPI(struct CvLSH*) cvCreateLSH(struct CvLSHOperations* ops, int d,
                                 int L CV_DEFAULT(10), int k CV_DEFAULT(10),
                                 int type CV_DEFAULT(CV_64FC1), double r CV_DEFAULT(4),
                                 int64 seed CV_DEFAULT(-1));

/* Construct in-memory LSH table, with n bins. */
CVAPI(struct CvLSH*) cvCreateMemoryLSH(int d, int n, int L CV_DEFAULT(10), int k CV_DEFAULT(10),
                                       int type CV_DEFAULT(CV_64FC1), double r CV_DEFAULT(4),
                                       int64 seed CV_DEFAULT(-1));

/* Free the given LSH structure. */
CVAPI(void) cvReleaseLSH(struct CvLSH** lsh);

/* Return the number of vectors in the LSH. */
CVAPI(unsigned int) LSHSize(struct CvLSH* lsh);

/* Add vectors to the LSH structure, optionally returning indices. */
CVAPI(void) cvLSHAdd(struct CvLSH* lsh, const CvMat* data, CvMat* indices CV_DEFAULT(0));

/* Remove vectors from LSH, as addressed by given indices. */
CVAPI(void) cvLSHRemove(struct CvLSH* lsh, const CvMat* indices);

/* Query the LSH n times for at most k nearest points; data is n x d,
 indices and dist are n x k. At most emax stored points will be accessed. */
CVAPI(void) cvLSHQuery(struct CvLSH* lsh, const CvMat* query_points,
                       CvMat* indices, CvMat* dist, int k, int emax);

/* Kolmogorov-Zabin stereo-correspondence algorithm (a.k.a. KZ1) */
#define CV_STEREO_GC_OCCLUDED  SHRT_MAX

typedef struct CvStereoGCState
{
    int Ithreshold;
    int interactionRadius;
    float K, lambda, lambda1, lambda2;
    int occlusionCost;
    int minDisparity;
    int numberOfDisparities;
    int maxIters;

    CvMat* left;
    CvMat* right;
    CvMat* dispLeft;
    CvMat* dispRight;
    CvMat* ptrLeft;
    CvMat* ptrRight;
    CvMat* vtxBuf;
    CvMat* edgeBuf;
} CvStereoGCState;

CVAPI(CvStereoGCState*) cvCreateStereoGCState( int numberOfDisparities, int maxIters );
CVAPI(void) cvReleaseStereoGCState( CvStereoGCState** state );

CVAPI(void) cvFindStereoCorrespondenceGC( const CvArr* left, const CvArr* right,
                                         CvArr* disparityLeft, CvArr* disparityRight,
                                         CvStereoGCState* state,
                                         int useDisparityGuess CV_DEFAULT(0) );

/* Calculates optical flow for 2 images using classical Lucas & Kanade algorithm */
CVAPI(void)  cvCalcOpticalFlowLK( const CvArr* prev, const CvArr* curr,
                                 CvSize win_size, CvArr* velx, CvArr* vely );

/* Calculates optical flow for 2 images using block matching algorithm */
CVAPI(void)  cvCalcOpticalFlowBM( const CvArr* prev, const CvArr* curr,
                                 CvSize block_size, CvSize shift_size,
                                 CvSize max_range, int use_previous,
                                 CvArr* velx, CvArr* vely );

/* Calculates Optical flow for 2 images using Horn & Schunck algorithm */
CVAPI(void)  cvCalcOpticalFlowHS( const CvArr* prev, const CvArr* curr,
                                 int use_previous, CvArr* velx, CvArr* vely,
                                 double lambda, CvTermCriteria criteria );


/****************************************************************************************\
*                           Background/foreground segmentation                           *
\****************************************************************************************/

/* We discriminate between foreground and background pixels
 * by building and maintaining a model of the background.
 * Any pixel which does not fit this model is then deemed
 * to be foreground.
 *
 * At present we support two core background models,
 * one of which has two variations:
 *
 *  o CV_BG_MODEL_FGD: latest and greatest algorithm, described in
 *
 *	 Foreground Object Detection from Videos Containing Complex Background.
 *	 Liyuan Li, Weimin Huang, Irene Y.H. Gu, and Qi Tian.
 *	 ACM MM2003 9p
 *
 *  o CV_BG_MODEL_FGD_SIMPLE:
 *       A code comment describes this as a simplified version of the above,
 *       but the code is in fact currently identical
 *
 *  o CV_BG_MODEL_MOG: "Mixture of Gaussians", older algorithm, described in
 *
 *       Moving target classification and tracking from real-time video.
 *       A Lipton, H Fujijoshi, R Patil
 *       Proceedings IEEE Workshop on Application of Computer Vision pp 8-14 1998
 *
 *       Learning patterns of activity using real-time tracking
 *       C Stauffer and W Grimson  August 2000
 *       IEEE Transactions on Pattern Analysis and Machine Intelligence 22(8):747-757
 */


#define CV_BG_MODEL_FGD		0
#define CV_BG_MODEL_MOG		1			/* "Mixture of Gaussians".	*/
#define CV_BG_MODEL_FGD_SIMPLE	2

struct CvBGStatModel;

typedef void (CV_CDECL * CvReleaseBGStatModel)( struct CvBGStatModel** bg_model );
typedef int (CV_CDECL * CvUpdateBGStatModel)( IplImage* curr_frame, struct CvBGStatModel* bg_model,
                                             double learningRate );

#define CV_BG_STAT_MODEL_FIELDS()                                               \
int             type; /*type of BG model*/                                      \
CvReleaseBGStatModel release;                                                   \
CvUpdateBGStatModel update;                                                     \
IplImage*       background;   /*8UC3 reference background image*/               \
IplImage*       foreground;   /*8UC1 foreground image*/                         \
IplImage**      layers;       /*8UC3 reference background image, can be null */ \
int             layer_count;  /* can be zero */                                 \
CvMemStorage*   storage;      /*storage for foreground_regions*/                \
CvSeq*          foreground_regions /*foreground object contours*/

typedef struct CvBGStatModel
{
    CV_BG_STAT_MODEL_FIELDS();
} CvBGStatModel;

//

// Releases memory used by BGStatModel
CVAPI(void) cvReleaseBGStatModel( CvBGStatModel** bg_model );

// Updates statistical model and returns number of found foreground regions
CVAPI(int) cvUpdateBGStatModel( IplImage* current_frame, CvBGStatModel*  bg_model,
                               double learningRate CV_DEFAULT(-1));

// Performs FG post-processing using segmentation
// (all pixels of a region will be classified as foreground if majority of pixels of the region are FG).
// parameters:
//      segments - pointer to result of segmentation (for example MeanShiftSegmentation)
//      bg_model - pointer to CvBGStatModel structure
CVAPI(void) cvRefineForegroundMaskBySegm( CvSeq* segments, CvBGStatModel*  bg_model );

/* Common use change detection function */
CVAPI(int)  cvChangeDetection( IplImage*  prev_frame,
                              IplImage*  curr_frame,
                              IplImage*  change_mask );

/*
 Interface of ACM MM2003 algorithm
 */

/* Default parameters of foreground detection algorithm: */
#define  CV_BGFG_FGD_LC              128
#define  CV_BGFG_FGD_N1C             15
#define  CV_BGFG_FGD_N2C             25

#define  CV_BGFG_FGD_LCC             64
#define  CV_BGFG_FGD_N1CC            25
#define  CV_BGFG_FGD_N2CC            40

/* Background reference image update parameter: */
#define  CV_BGFG_FGD_ALPHA_1         0.1f

/* stat model update parameter
 * 0.002f ~ 1K frame(~45sec), 0.005 ~ 18sec (if 25fps and absolutely static BG)
 */
#define  CV_BGFG_FGD_ALPHA_2         0.005f

/* start value for alpha parameter (to fast initiate statistic model) */
#define  CV_BGFG_FGD_ALPHA_3         0.1f

#define  CV_BGFG_FGD_DELTA           2

#define  CV_BGFG_FGD_T               0.9f

#define  CV_BGFG_FGD_MINAREA         15.f

#define  CV_BGFG_FGD_BG_UPDATE_TRESH 0.5f

/* See the above-referenced Li/Huang/Gu/Tian paper
 * for a full description of these background-model
 * tuning parameters.
 *
 * Nomenclature:  'c'  == "color", a three-component red/green/blue vector.
 *                         We use histograms of these to model the range of
 *                         colors we've seen at a given background pixel.
 *
 *                'cc' == "color co-occurrence", a six-component vector giving
 *                         RGB color for both this frame and preceding frame.
 *                             We use histograms of these to model the range of
 *                         color CHANGES we've seen at a given background pixel.
 */
typedef struct CvFGDStatModelParams
{
    int    Lc;			/* Quantized levels per 'color' component. Power of two, typically 32, 64 or 128.				*/
    int    N1c;			/* Number of color vectors used to model normal background color variation at a given pixel.			*/
    int    N2c;			/* Number of color vectors retained at given pixel.  Must be > N1c, typically ~ 5/3 of N1c.			*/
    /* Used to allow the first N1c vectors to adapt over time to changing background.				*/

    int    Lcc;			/* Quantized levels per 'color co-occurrence' component.  Power of two, typically 16, 32 or 64.			*/
    int    N1cc;		/* Number of color co-occurrence vectors used to model normal background color variation at a given pixel.	*/
    int    N2cc;		/* Number of color co-occurrence vectors retained at given pixel.  Must be > N1cc, typically ~ 5/3 of N1cc.	*/
    /* Used to allow the first N1cc vectors to adapt over time to changing background.				*/

    int    is_obj_without_holes;/* If TRUE we ignore holes within foreground blobs. Defaults to TRUE.						*/
    int    perform_morphing;	/* Number of erode-dilate-erode foreground-blob cleanup iterations.						*/
    /* These erase one-pixel junk blobs and merge almost-touching blobs. Default value is 1.			*/

    float  alpha1;		/* How quickly we forget old background pixel values seen.  Typically set to 0.1  				*/
    float  alpha2;		/* "Controls speed of feature learning". Depends on T. Typical value circa 0.005. 				*/
    float  alpha3;		/* Alternate to alpha2, used (e.g.) for quicker initial convergence. Typical value 0.1.				*/

    float  delta;		/* Affects color and color co-occurrence quantization, typically set to 2.					*/
    float  T;			/* "A percentage value which determines when new features can be recognized as new background." (Typically 0.9).*/
    float  minArea;		/* Discard foreground blobs whose bounding box is smaller than this threshold.					*/
} CvFGDStatModelParams;

typedef struct CvBGPixelCStatTable
{
    float          Pv, Pvb;
    uchar          v[3];
} CvBGPixelCStatTable;

typedef struct CvBGPixelCCStatTable
{
    float          Pv, Pvb;
    uchar          v[6];
} CvBGPixelCCStatTable;

typedef struct CvBGPixelStat
{
    float                 Pbc;
    float                 Pbcc;
    CvBGPixelCStatTable*  ctable;
    CvBGPixelCCStatTable* cctable;
    uchar                 is_trained_st_model;
    uchar                 is_trained_dyn_model;
} CvBGPixelStat;


typedef struct CvFGDStatModel
{
    CV_BG_STAT_MODEL_FIELDS();
    CvBGPixelStat*         pixel_stat;
    IplImage*              Ftd;
    IplImage*              Fbd;
    IplImage*              prev_frame;
    CvFGDStatModelParams   params;
} CvFGDStatModel;

/* Creates FGD model */
CVAPI(CvBGStatModel*) cvCreateFGDStatModel( IplImage* first_frame,
                                           CvFGDStatModelParams* parameters CV_DEFAULT(NULL));

/*
 Interface of Gaussian mixture algorithm

 "An improved adaptive background mixture model for real-time tracking with shadow detection"
 P. KadewTraKuPong and R. Bowden,
 Proc. 2nd European Workshp on Advanced Video-Based Surveillance Systems, 2001."
 http://personal.ee.surrey.ac.uk/Personal/R.Bowden/publications/avbs01/avbs01.pdf
 */

/* Note:  "MOG" == "Mixture Of Gaussians": */

#define CV_BGFG_MOG_MAX_NGAUSSIANS 500

/* default parameters of gaussian background detection algorithm */
#define CV_BGFG_MOG_BACKGROUND_THRESHOLD     0.7     /* threshold sum of weights for background test */
#define CV_BGFG_MOG_STD_THRESHOLD            2.5     /* lambda=2.5 is 99% */
#define CV_BGFG_MOG_WINDOW_SIZE              200     /* Learning rate; alpha = 1/CV_GBG_WINDOW_SIZE */
#define CV_BGFG_MOG_NGAUSSIANS               5       /* = K = number of Gaussians in mixture */
#define CV_BGFG_MOG_WEIGHT_INIT              0.05
#define CV_BGFG_MOG_SIGMA_INIT               30
#define CV_BGFG_MOG_MINAREA                  15.f


#define CV_BGFG_MOG_NCOLORS                  3

typedef struct CvGaussBGStatModelParams
{
    int     win_size;               /* = 1/alpha */
    int     n_gauss;
    double  bg_threshold, std_threshold, minArea;
    double  weight_init, variance_init;
}CvGaussBGStatModelParams;

typedef struct CvGaussBGValues
{
    int         match_sum;
    double      weight;
    double      variance[CV_BGFG_MOG_NCOLORS];
    double      mean[CV_BGFG_MOG_NCOLORS];
} CvGaussBGValues;

typedef struct CvGaussBGPoint
{
    CvGaussBGValues* g_values;
} CvGaussBGPoint;


typedef struct CvGaussBGModel
{
    CV_BG_STAT_MODEL_FIELDS();
    CvGaussBGStatModelParams   params;
    CvGaussBGPoint*            g_point;
    int                        countFrames;
    void*                      mog;
} CvGaussBGModel;


/* Creates Gaussian mixture background model */
CVAPI(CvBGStatModel*) cvCreateGaussianBGModel( IplImage* first_frame,
                                              CvGaussBGStatModelParams* parameters CV_DEFAULT(NULL));


typedef struct CvBGCodeBookElem
{
    struct CvBGCodeBookElem* next;
    int tLastUpdate;
    int stale;
    uchar boxMin[3];
    uchar boxMax[3];
    uchar learnMin[3];
    uchar learnMax[3];
} CvBGCodeBookElem;

typedef struct CvBGCodeBookModel
{
    CvSize size;
    int t;
    uchar cbBounds[3];
    uchar modMin[3];
    uchar modMax[3];
    CvBGCodeBookElem** cbmap;
    CvMemStorage* storage;
    CvBGCodeBookElem* freeList;
} CvBGCodeBookModel;

CVAPI(CvBGCodeBookModel*) cvCreateBGCodeBookModel( void );
CVAPI(void) cvReleaseBGCodeBookModel( CvBGCodeBookModel** model );

CVAPI(void) cvBGCodeBookUpdate( CvBGCodeBookModel* model, const CvArr* image,
                               CvRect roi CV_DEFAULT(cvRect(0,0,0,0)),
                               const CvArr* mask CV_DEFAULT(0) );

CVAPI(int) cvBGCodeBookDiff( const CvBGCodeBookModel* model, const CvArr* image,
                            CvArr* fgmask, CvRect roi CV_DEFAULT(cvRect(0,0,0,0)) );

CVAPI(void) cvBGCodeBookClearStale( CvBGCodeBookModel* model, int staleThresh,
                                   CvRect roi CV_DEFAULT(cvRect(0,0,0,0)),
                                   const CvArr* mask CV_DEFAULT(0) );

CVAPI(CvSeq*) cvSegmentFGMask( CvArr *fgmask, int poly1Hull0 CV_DEFAULT(1),
                              float perimScale CV_DEFAULT(4.f),
                              CvMemStorage* storage CV_DEFAULT(0),
                              CvPoint offset CV_DEFAULT(cvPoint(0,0)));

#ifdef __cplusplus
}
#endif

#endif

/* End of file. */