mediaLib Library Functions           mlibImageConvolveMxN(3MLIB)



NAME
     mlibImageConvolveMxN  -  MxN   convolution,   with   kernel
     analysis for taking advantage of special cases

SYNOPSIS
     cc [ flag... ] file... -lmlib [ library... ]
     #include 

     mlibstatus mlibImageConvolveMxN(mlibimage *dst, const mlibimage *src,
          const mlibd64 *kernel, mlibs32 m, mlibs32 n, mlibs32 dm,
          mlibs32 dn, mlibs32 cmask, mlibedge edge);


DESCRIPTION
     The mlibImageConvolveMxN() function analyzes  the  convolu-
     tion  kernel,  converts  the  floating-point  kernel  to  an
     integer kernel, then  performs  a  MxN  convolution  on  the
     source  image  by  calling  either one of the functions like
     mlibImageSConv3x3(), mlibImageConv3x3(), and etc. in  spe-
     cial cases or mlibImageConvMxN() in other cases.


     The input image and the output  image  must  have  the  same
     image  type  and  have  the  same  number  of  channels. The
     unselected channels in the output image are not overwritten.
     For single-channel images, the channel mask is ignored.


     It uses the following equation:

                      m-1-dm n-1-dn
       dst[x][y][i] =  SUM    SUM  src[x]p][y]q][i]*k[p][q]
                      p=-dm  q=-dn



     where m > 1, n > 1, 0 < dm < m, 0 < dn < n.

PARAMETERS
     The function takes the following arguments:

     dst       Pointer to destination image.


     src       Pointer to source image.


     kernel    Pointer to the convolution kernel,  in  row  major
               order.






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mediaLib Library Functions           mlibImageConvolveMxN(3MLIB)



     m         Width of the convolution kernel. m > 1.


     n         Height of the convolution kernel. n > 1.


     dm        X coordinate of the key element in the convolution
               kernel. 0 < dm < m.


     dn        Y coordinate of the key element in the convolution
               kernel. 0 < dn < n.


     cmask     Channel mask to indicate the channels to  be  con-
               volved,  each bit of which represents a channel in
               the image. The channels corresponding  to  1  bits
               are  those  to  be processed. For a single-channel
               image, the channel mask is ignored.


     edge      Type of edge condition. It can be one of the  fol-
               lowing:

                 MLIBEDGEDSTNOWRITE
                 MLIBEDGEDSTFILZERO
                 MLIBEDGEDSTCOPYSRC
                 MLIBEDGESRCEXTEND



RETURN VALUES
     The function returns MLIBSUCES if  successful.  Otherwise
     it returns MLIBFAILURE.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

















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mediaLib Library Functions           mlibImageConvolveMxN(3MLIB)



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     mlibImageConv2x2(3MLIB),       mlibImageConv2x2Fp(3MLIB),
     mlibImageConv2x2Index(3MLIB),     mlibImageConv3x3(3MLIB),
     mlibImageConv3x3Fp(3MLIB),  mlibImageConv3x3Index(3MLIB),
     mlibImageConv4x4(3MLIB),       mlibImageConv4x4Fp(3MLIB),
     mlibImageConv4x4Index(3MLIB),     mlibImageConv5x5(3MLIB),
     mlibImageConv5x5Fp(3MLIB),  mlibImageConv5x5Index(3MLIB),
     mlibImageConv7x7(3MLIB),       mlibImageConv7x7Fp(3MLIB),
     mlibImageConv7x7Index(3MLIB),
     mlibImageConvKernelConvert(3MLIB),
     mlibImageConvMxN(3MLIB),       mlibImageConvMxNFp(3MLIB),
     mlibImageConvMxNIndex(3MLIB),
     mlibImageConvolveMxNFp(3MLIB),  mlibImageSConv3x3(3MLIB),
     mlibImageSConv3x3Fp(3MLIB),     mlibImageSConv5x5(3MLIB),
     mlibImageSConv5x5Fp(3MLIB),     mlibImageSConv7x7(3MLIB),
     mlibImageSConv7x7Fp(3MLIB),
     mlibImageSConvKernelConvert(3MLIB), attributes(5)





























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