/*F///////////////////////////////////////////////////////////////////////////////////////
 //    Name:    cvSobel
 //    Purpose: calculates an image derivative d^(xorder+yorder)I/((dx)^xorder)*(dy^yoder))
 //             by convolving the image with extended Sobel operators.
 //             No scaling is performed.
 //
 //             |-1 -2 -1|     |-1 0 1|
 //             | 0  0  0| and |-2 0 2| are partial cases of it.
 //             | 1  2  1|     |-1 0 1|
 //
 //             First one corresponds to xorder = 0, yorder = 1, apertureSize = 3,
 //             And the second corresponds to xorder = 1, yorder = 0, apertureSize = 3.
 //    Context:
 //    Parameters:
 //      src    - source image
 //      dst    - destination derivative image
 //      xorder - order of x derivative
 //      yorder - order of y derivative
 //      apertureSize - size of colvolution operator. Must be odd: 3, 5, ... or
 //                                        | -3  0  3 |    | -3 -10 -3 |
 //                     CV_SCHARR (-1) for | -10 0 10 | or |  0   0  0 | kernels.
 //                                        | -3  0  3 |    |  3  10  3 |
 //    Returns:
 //    Notes:
 //      The function uses replicatation border mode.
 //      In case of yorder is odd, the image origin is taken into account.
 //      (for matrices the top-left origin is assumed)
 //F*/
 #define CV_SCHARR -1
 OPENCVAPI void cvSobel( const CvArr* src, CvArr* dst,
                         int xorder, int yorder,
                         int apertureSize CV_DEFAULT(3));

 /*F///////////////////////////////////////////////////////////////////////////////////////
 //    Name:     cvLaplace
 //    Purpose:  Calculates Laplacian of the image: deltaI = d^2(I)/dx^2 + d^2(I)/dy^2.
 //              Sobel operator is used for calculating derivatives.
 //    Context:
 //    Parameters:
 //      src - source image
 //      dst - destination image
 //      apertureSize - size of applied aperture
 //    Returns:
 //    Notes:
 //F*/
 OPENCVAPI void cvLaplace( const CvArr* src, CvArr* dst,
                           int apertureSize CV_DEFAULT(3) );