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#ifndef __OPENCV_IMGPROC_TYPES_C_H__
#define __OPENCV_IMGPROC_TYPES_C_H__

#include "opencv2/core/core_c.h"
#include "opencv2/imgproc/types_c.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Connected component structure */
typedef struct CvConnectedComp
{
    double area;    /* area of the connected component  */
    CvScalar value; /* average color of the connected component */
    CvRect rect;    /* ROI of the component  */
    CvSeq* contour; /* optional component boundary
                      (the contour might have child contours corresponding to the holes)*/
}
CvConnectedComp;

/* Image smooth methods */
enum
{
    CV_BLUR_NO_SCALE =0,
    CV_BLUR  =1,
    CV_GAUSSIAN  =2,
    CV_MEDIAN =3,
    CV_BILATERAL =4
};

/* Filters used in pyramid decomposition */
enum
{
    CV_GAUSSIAN_5x5 = 7
};

/* Inpainting algorithms */
enum
{
    CV_INPAINT_NS      =0,
    CV_INPAINT_TELEA   =1
};

/* Special filters */
enum
{
    CV_SCHARR =-1,
    CV_MAX_SOBEL_KSIZE =7
};

/* Constants for color conversion */
enum
{
    CV_BGR2BGRA    =0,
    CV_RGB2RGBA    =CV_BGR2BGRA,

    CV_BGRA2BGR    =1,
    CV_RGBA2RGB    =CV_BGRA2BGR,

    CV_BGR2RGBA    =2,
    CV_RGB2BGRA    =CV_BGR2RGBA,

    CV_RGBA2BGR    =3,
    CV_BGRA2RGB    =CV_RGBA2BGR,

    CV_BGR2RGB     =4,
    CV_RGB2BGR     =CV_BGR2RGB,

    CV_BGRA2RGBA   =5,
    CV_RGBA2BGRA   =CV_BGRA2RGBA,

    CV_BGR2GRAY    =6,
    CV_RGB2GRAY    =7,
    CV_GRAY2BGR    =8,
    CV_GRAY2RGB    =CV_GRAY2BGR,
    CV_GRAY2BGRA   =9,
    CV_GRAY2RGBA   =CV_GRAY2BGRA,
    CV_BGRA2GRAY   =10,
    CV_RGBA2GRAY   =11,

    CV_BGR2BGR565  =12,
    CV_RGB2BGR565  =13,
    CV_BGR5652BGR  =14,
    CV_BGR5652RGB  =15,
    CV_BGRA2BGR565 =16,
    CV_RGBA2BGR565 =17,
    CV_BGR5652BGRA =18,
    CV_BGR5652RGBA =19,

    CV_GRAY2BGR565 =20,
    CV_BGR5652GRAY =21,

    CV_BGR2BGR555  =22,
    CV_RGB2BGR555  =23,
    CV_BGR5552BGR  =24,
    CV_BGR5552RGB  =25,
    CV_BGRA2BGR555 =26,
    CV_RGBA2BGR555 =27,
    CV_BGR5552BGRA =28,
    CV_BGR5552RGBA =29,

    CV_GRAY2BGR555 =30,
    CV_BGR5552GRAY =31,

    CV_BGR2XYZ     =32,
    CV_RGB2XYZ     =33,
    CV_XYZ2BGR     =34,
    CV_XYZ2RGB     =35,

    CV_BGR2YCrCb   =36,
    CV_RGB2YCrCb   =37,
    CV_YCrCb2BGR   =38,
    CV_YCrCb2RGB   =39,

    CV_BGR2HSV     =40,
    CV_RGB2HSV     =41,

    CV_BGR2Lab     =44,
    CV_RGB2Lab     =45,

    CV_BayerBG2BGR =46,
    CV_BayerGB2BGR =47,
    CV_BayerRG2BGR =48,
    CV_BayerGR2BGR =49,

    CV_BayerBG2RGB =CV_BayerRG2BGR,
    CV_BayerGB2RGB =CV_BayerGR2BGR,
    CV_BayerRG2RGB =CV_BayerBG2BGR,
    CV_BayerGR2RGB =CV_BayerGB2BGR,

    CV_BGR2Luv     =50,
    CV_RGB2Luv     =51,
    CV_BGR2HLS     =52,
    CV_RGB2HLS     =53,

    CV_HSV2BGR     =54,
    CV_HSV2RGB     =55,

    CV_Lab2BGR     =56,
    CV_Lab2RGB     =57,
    CV_Luv2BGR     =58,
    CV_Luv2RGB     =59,
    CV_HLS2BGR     =60,
    CV_HLS2RGB     =61,

    CV_BayerBG2BGR_VNG =62,
    CV_BayerGB2BGR_VNG =63,
    CV_BayerRG2BGR_VNG =64,
    CV_BayerGR2BGR_VNG =65,
    
    CV_BayerBG2RGB_VNG =CV_BayerRG2BGR_VNG,
    CV_BayerGB2RGB_VNG =CV_BayerGR2BGR_VNG,
    CV_BayerRG2RGB_VNG =CV_BayerBG2BGR_VNG,
    CV_BayerGR2RGB_VNG =CV_BayerGB2BGR_VNG,
    
    CV_BGR2HSV_FULL = 66,
    CV_RGB2HSV_FULL = 67,
    CV_BGR2HLS_FULL = 68,
    CV_RGB2HLS_FULL = 69,
    
    CV_HSV2BGR_FULL = 70,
    CV_HSV2RGB_FULL = 71,
    CV_HLS2BGR_FULL = 72,
    CV_HLS2RGB_FULL = 73,
    
    CV_LBGR2Lab     = 74,
    CV_LRGB2Lab     = 75,
    CV_LBGR2Luv     = 76,
    CV_LRGB2Luv     = 77,
    
    CV_Lab2LBGR     = 78,
    CV_Lab2LRGB     = 79,
    CV_Luv2LBGR     = 80,
    CV_Luv2LRGB     = 81,
    
    CV_BGR2YUV      = 82,
    CV_RGB2YUV      = 83,
    CV_YUV2BGR      = 84,
    CV_YUV2RGB      = 85,
    
    CV_BayerBG2GRAY = 86,
    CV_BayerGB2GRAY = 87,
    CV_BayerRG2GRAY = 88,
    CV_BayerGR2GRAY = 89,
    
    CV_COLORCVT_MAX  =100
};


/* Sub-pixel interpolation methods */
enum
{
    CV_INTER_NN        =0,
    CV_INTER_LINEAR    =1,
    CV_INTER_CUBIC     =2,
    CV_INTER_AREA      =3,
    CV_INTER_LANCZOS4  =4
};

/* ... and other image warping flags */
enum
{
    CV_WARP_FILL_OUTLIERS =8,
    CV_WARP_INVERSE_MAP  =16
};

/* Shapes of a structuring element for morphological operations */
enum
{
    CV_SHAPE_RECT      =0,
    CV_SHAPE_CROSS     =1,
    CV_SHAPE_ELLIPSE   =2,
    CV_SHAPE_CUSTOM    =100
};

/* Morphological operations */
enum
{
    CV_MOP_ERODE        =0,
    CV_MOP_DILATE       =1,
    CV_MOP_OPEN         =2,
    CV_MOP_CLOSE        =3,
    CV_MOP_GRADIENT     =4,
    CV_MOP_TOPHAT       =5,
    CV_MOP_BLACKHAT     =6
};

/* Spatial and central moments */
typedef struct CvMoments
{
    double  m00, m10, m01, m20, m11, m02, m30, m21, m12, m03; /* spatial moments */
    double  mu20, mu11, mu02, mu30, mu21, mu12, mu03; /* central moments */
    double  inv_sqrt_m00; /* m00 != 0 ? 1/sqrt(m00) : 0 */
}
CvMoments;

/* Hu invariants */
typedef struct CvHuMoments
{
    double hu1, hu2, hu3, hu4, hu5, hu6, hu7; /* Hu invariants */
}
CvHuMoments;

/* Template matching methods */
enum
{
    CV_TM_SQDIFF        =0,
    CV_TM_SQDIFF_NORMED =1,
    CV_TM_CCORR         =2,
    CV_TM_CCORR_NORMED  =3,
    CV_TM_CCOEFF        =4,
    CV_TM_CCOEFF_NORMED =5
};

typedef float (CV_CDECL * CvDistanceFunction)( const float* a, const float* b, void* user_param );

/* Contour retrieval modes */
enum
{
    CV_RETR_EXTERNAL=0,
    CV_RETR_LIST=1,
    CV_RETR_CCOMP=2,
    CV_RETR_TREE=3
};

/* Contour approximation methods */
enum
{
    CV_CHAIN_CODE=0,
    CV_CHAIN_APPROX_NONE=1,
    CV_CHAIN_APPROX_SIMPLE=2,
    CV_CHAIN_APPROX_TC89_L1=3,
    CV_CHAIN_APPROX_TC89_KCOS=4,
    CV_LINK_RUNS=5
};

/*
Internal structure that is used for sequental retrieving contours from the image.
It supports both hierarchical and plane variants of Suzuki algorithm.
*/
typedef struct _CvContourScanner* CvContourScanner;

/* Freeman chain reader state */
typedef struct CvChainPtReader
{
    CV_SEQ_READER_FIELDS()
    char      code;
    CvPoint   pt;
    schar     deltas[8][2];
}
CvChainPtReader;

/* initializes 8-element array for fast access to 3x3 neighborhood of a pixel */
#define  CV_INIT_3X3_DELTAS( deltas, step, nch )            \
    ((deltas)[0] =  (nch),  (deltas)[1] = -(step) + (nch),  \
     (deltas)[2] = -(step), (deltas)[3] = -(step) - (nch),  \
     (deltas)[4] = -(nch),  (deltas)[5] =  (step) - (nch),  \
     (deltas)[6] =  (step), (deltas)[7] =  (step) + (nch))


/****************************************************************************************\
*                              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])


/* Contour approximation algorithms */
enum
{
    CV_POLY_APPROX_DP = 0
};

/* Shape matching methods */
enum
{
    CV_CONTOURS_MATCH_I1  =1,
    CV_CONTOURS_MATCH_I2  =2,
    CV_CONTOURS_MATCH_I3  =3
};

/* Shape orientation */
enum
{
    CV_CLOCKWISE         =1,
    CV_COUNTER_CLOCKWISE =2
};


/* Convexity defect */
typedef struct CvConvexityDefect
{
    CvPoint* start; /* point of the contour where the defect begins */
    CvPoint* end; /* point of the contour where the defect ends */
    CvPoint* depth_point; /* the farthest from the convex hull point within the defect */
    float depth; /* distance between the farthest point and the convex hull */
} CvConvexityDefect;


/* Histogram comparison methods */
enum
{
    CV_COMP_CORREL        =0,
    CV_COMP_CHISQR        =1,
    CV_COMP_INTERSECT     =2,
    CV_COMP_BHATTACHARYYA =3
};

/* Mask size for distance transform */
enum
{
    CV_DIST_MASK_3   =3,
    CV_DIST_MASK_5   =5,
    CV_DIST_MASK_PRECISE =0
};

/* Distance types for Distance Transform and M-estimators */
enum
{
    CV_DIST_USER    =-1,  /* User defined distance */
    CV_DIST_L1      =1,   /* distance = |x1-x2| + |y1-y2| */
    CV_DIST_L2      =2,   /* the simple euclidean distance */
    CV_DIST_C       =3,   /* distance = max(|x1-x2|,|y1-y2|) */
    CV_DIST_L12     =4,   /* L1-L2 metric: distance = 2(sqrt(1+x*x/2) - 1)) */
    CV_DIST_FAIR    =5,   /* distance = c^2(|x|/c-log(1+|x|/c)), c = 1.3998 */
    CV_DIST_WELSCH  =6,   /* distance = c^2/2(1-exp(-(x/c)^2)), c = 2.9846 */
    CV_DIST_HUBER   =7    /* distance = |x|<c ? x^2/2 : c(|x|-c/2), c=1.345 */
};


/* Threshold types */
enum
{
    CV_THRESH_BINARY      =0,  /* value = value > threshold ? max_value : 0       */
    CV_THRESH_BINARY_INV  =1,  /* value = value > threshold ? 0 : max_value       */
    CV_THRESH_TRUNC       =2,  /* value = value > threshold ? threshold : value   */
    CV_THRESH_TOZERO      =3,  /* value = value > threshold ? value : 0           */
    CV_THRESH_TOZERO_INV  =4,  /* value = value > threshold ? 0 : value           */
    CV_THRESH_MASK        =7,
    CV_THRESH_OTSU        =8  /* use Otsu algorithm to choose the optimal threshold value;
                                 combine the flag with one of the above CV_THRESH_* values */
};

/* Adaptive threshold methods */
enum
{
    CV_ADAPTIVE_THRESH_MEAN_C  =0,
    CV_ADAPTIVE_THRESH_GAUSSIAN_C  =1
};

/* FloodFill flags */
enum
{
    CV_FLOODFILL_FIXED_RANGE =(1 << 16),
    CV_FLOODFILL_MASK_ONLY   =(1 << 17)
};


/* Canny edge detector flags */
enum
{
    CV_CANNY_L2_GRADIENT  =(1 << 31)
};

/* Variants of a Hough transform */
enum
{
    CV_HOUGH_STANDARD =0,
    CV_HOUGH_PROBABILISTIC =1,
    CV_HOUGH_MULTI_SCALE =2,
    CV_HOUGH_GRADIENT =3
};


/* Fast search data structures  */
struct CvFeatureTree;
struct CvLSH;
struct CvLSHOperations;

#ifdef __cplusplus
}
#endif

#endif

---