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  #ifndef __OPENCV_IMGPROC_TYPES_C_H__
  #define __OPENCV_IMGPROC_TYPES_C_H__
  
  #include "opencv2/core/core_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
  };
  
  /* 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,
  
      //YUV 4:2:0 formats family
      CV_YUV2RGB_NV12 = 90,
      CV_YUV2BGR_NV12 = 91,
      CV_YUV2RGB_NV21 = 92,
      CV_YUV2BGR_NV21 = 93,
      CV_YUV420sp2RGB = CV_YUV2RGB_NV21,
      CV_YUV420sp2BGR = CV_YUV2BGR_NV21,
  
      CV_YUV2RGBA_NV12 = 94,
      CV_YUV2BGRA_NV12 = 95,
      CV_YUV2RGBA_NV21 = 96,
      CV_YUV2BGRA_NV21 = 97,
      CV_YUV420sp2RGBA = CV_YUV2RGBA_NV21,
      CV_YUV420sp2BGRA = CV_YUV2BGRA_NV21,
  
      CV_YUV2RGB_YV12 = 98,
      CV_YUV2BGR_YV12 = 99,
      CV_YUV2RGB_IYUV = 100,
      CV_YUV2BGR_IYUV = 101,
      CV_YUV2RGB_I420 = CV_YUV2RGB_IYUV,
      CV_YUV2BGR_I420 = CV_YUV2BGR_IYUV,
      CV_YUV420p2RGB = CV_YUV2RGB_YV12,
      CV_YUV420p2BGR = CV_YUV2BGR_YV12,
  
      CV_YUV2RGBA_YV12 = 102,
      CV_YUV2BGRA_YV12 = 103,
      CV_YUV2RGBA_IYUV = 104,
      CV_YUV2BGRA_IYUV = 105,
      CV_YUV2RGBA_I420 = CV_YUV2RGBA_IYUV,
      CV_YUV2BGRA_I420 = CV_YUV2BGRA_IYUV,
      CV_YUV420p2RGBA = CV_YUV2RGBA_YV12,
      CV_YUV420p2BGRA = CV_YUV2BGRA_YV12,
  
      CV_YUV2GRAY_420 = 106,
      CV_YUV2GRAY_NV21 = CV_YUV2GRAY_420,
      CV_YUV2GRAY_NV12 = CV_YUV2GRAY_420,
      CV_YUV2GRAY_YV12 = CV_YUV2GRAY_420,
      CV_YUV2GRAY_IYUV = CV_YUV2GRAY_420,
      CV_YUV2GRAY_I420 = CV_YUV2GRAY_420,
      CV_YUV420sp2GRAY = CV_YUV2GRAY_420,
      CV_YUV420p2GRAY = CV_YUV2GRAY_420,
  
      //YUV 4:2:2 formats family
      CV_YUV2RGB_UYVY = 107,
      CV_YUV2BGR_UYVY = 108,
      //CV_YUV2RGB_VYUY = 109,
      //CV_YUV2BGR_VYUY = 110,
      CV_YUV2RGB_Y422 = CV_YUV2RGB_UYVY,
      CV_YUV2BGR_Y422 = CV_YUV2BGR_UYVY,
      CV_YUV2RGB_UYNV = CV_YUV2RGB_UYVY,
      CV_YUV2BGR_UYNV = CV_YUV2BGR_UYVY,
  
      CV_YUV2RGBA_UYVY = 111,
      CV_YUV2BGRA_UYVY = 112,
      //CV_YUV2RGBA_VYUY = 113,
      //CV_YUV2BGRA_VYUY = 114,
      CV_YUV2RGBA_Y422 = CV_YUV2RGBA_UYVY,
      CV_YUV2BGRA_Y422 = CV_YUV2BGRA_UYVY,
      CV_YUV2RGBA_UYNV = CV_YUV2RGBA_UYVY,
      CV_YUV2BGRA_UYNV = CV_YUV2BGRA_UYVY,
  
      CV_YUV2RGB_YUY2 = 115,
      CV_YUV2BGR_YUY2 = 116,
      CV_YUV2RGB_YVYU = 117,
      CV_YUV2BGR_YVYU = 118,
      CV_YUV2RGB_YUYV = CV_YUV2RGB_YUY2,
      CV_YUV2BGR_YUYV = CV_YUV2BGR_YUY2,
      CV_YUV2RGB_YUNV = CV_YUV2RGB_YUY2,
      CV_YUV2BGR_YUNV = CV_YUV2BGR_YUY2,
  
      CV_YUV2RGBA_YUY2 = 119,
      CV_YUV2BGRA_YUY2 = 120,
      CV_YUV2RGBA_YVYU = 121,
      CV_YUV2BGRA_YVYU = 122,
      CV_YUV2RGBA_YUYV = CV_YUV2RGBA_YUY2,
      CV_YUV2BGRA_YUYV = CV_YUV2BGRA_YUY2,
      CV_YUV2RGBA_YUNV = CV_YUV2RGBA_YUY2,
      CV_YUV2BGRA_YUNV = CV_YUV2BGRA_YUY2,
  
      CV_YUV2GRAY_UYVY = 123,
      CV_YUV2GRAY_YUY2 = 124,
      //CV_YUV2GRAY_VYUY = CV_YUV2GRAY_UYVY,
      CV_YUV2GRAY_Y422 = CV_YUV2GRAY_UYVY,
      CV_YUV2GRAY_UYNV = CV_YUV2GRAY_UYVY,
      CV_YUV2GRAY_YVYU = CV_YUV2GRAY_YUY2,
      CV_YUV2GRAY_YUYV = CV_YUV2GRAY_YUY2,
      CV_YUV2GRAY_YUNV = CV_YUV2GRAY_YUY2,
  
      // alpha premultiplication
      CV_RGBA2mRGBA = 125,
      CV_mRGBA2RGBA = 126,
  
      CV_RGB2YUV_I420 = 127,
      CV_BGR2YUV_I420 = 128,
      CV_RGB2YUV_IYUV = CV_RGB2YUV_I420,
      CV_BGR2YUV_IYUV = CV_BGR2YUV_I420,
  
      CV_RGBA2YUV_I420 = 129,
      CV_BGRA2YUV_I420 = 130,
      CV_RGBA2YUV_IYUV = CV_RGBA2YUV_I420,
      CV_BGRA2YUV_IYUV = CV_BGRA2YUV_I420,
      CV_RGB2YUV_YV12  = 131,
      CV_BGR2YUV_YV12  = 132,
      CV_RGBA2YUV_YV12 = 133,
      CV_BGRA2YUV_YV12 = 134,
  
      CV_COLORCVT_MAX  = 135
  };
  
  
  /* 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,
      CV_RETR_FLOODFILL=4
  };
  
  /* 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,
      CV_COMP_HELLINGER     =CV_COMP_BHATTACHARYYA
  };
  
  /* Mask size for distance transform */
  enum
  {
      CV_DIST_MASK_3   =3,
      CV_DIST_MASK_5   =5,
      CV_DIST_MASK_PRECISE =0
  };
  
  /* Content of output label array: connected components or pixels */
  enum
  {
    CV_DIST_LABEL_CCOMP = 0,
    CV_DIST_LABEL_PIXEL = 1
  };
  
  /* 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
  