Manual Pages for UNIX Operating System command usage for man mlib_ImageConv2x2Index

mediaLib Library Functions          mlib_ImageConv2x2Index(3MLIB)



NAME
     mlib_ImageConv2x2Index - 2x2 convolution on a color  indexed
     image

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

     mlib_status mlib_ImageConv2x2Index(mlib_image *dst, const mlib_image *src,
          const mlib_s32 *kernel, mlib_s32 scale, mlib_edge edge,
          const void *colormap);


DESCRIPTION
     The mlib_ImageConv2x2Index() function performs a 2x2  convo-
     lution  on the color indexed source image by using the user-
     supplied kernel.


     The input and output images must have the  same  image  type
     and size.


     For this convolution, the key  element  of  the  convolution
     kernel is located at (0, 0) of the kernel matrix.


     This function performs  the  convolution  on  color  indexed
     image.  The input image and the output image must be single-
     channel  images.  The  image  type  must  be  MLIB_BYTE   or
     MLIB_SHORT.


     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]*2**(-scale)
                      p=-dm  q=-dn



     where m = 2, n = 2, dm = (m - 1)/2 = 0, dn = (n - 1)/2 = 0.

PARAMETERS
     The function takes the following arguments:

     dst         Pointer to destination image.


     src         Pointer to source image.





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mediaLib Library Functions          mlib_ImageConv2x2Index(3MLIB)



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


     scale       Scaling factor.


     edge        Type of edge condition. It can  be  one  of  the
                 following:

                   MLIB_EDGE_DST_NO_WRITE
                   MLIB_EDGE_DST_FILL_ZERO
                   MLIB_EDGE_DST_COPY_SRC
                   MLIB_EDGE_SRC_EXTEND



     colormap    Internal data structure for inverse  color  map-
                 ping.  This  data  structure is generated by the
                 mlib_ImageColorTrue2IndexInit() function.


RETURN VALUES
     The function returns MLIB_SUCCESS if  successful.  Otherwise
     it returns MLIB_FAILURE.

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



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     mlib_ImageConv2x2(3MLIB),       mlib_ImageConv2x2_Fp(3MLIB),
     mlib_ImageConv3x3(3MLIB),       mlib_ImageConv3x3_Fp(3MLIB),
     mlib_ImageConv3x3Index(3MLIB),     mlib_ImageConv4x4(3MLIB),
     mlib_ImageConv4x4_Fp(3MLIB),  mlib_ImageConv4x4Index(3MLIB),
     mlib_ImageConv5x5(3MLIB),       mlib_ImageConv5x5_Fp(3MLIB),
     mlib_ImageConv5x5Index(3MLIB),     mlib_ImageConv7x7(3MLIB),
     mlib_ImageConv7x7_Fp(3MLIB),  mlib_ImageConv7x7Index(3MLIB),
     mlib_ImageConvKernelConvert(3MLIB),
     mlib_ImageConvMxN(3MLIB),       mlib_ImageConvMxN_Fp(3MLIB),
     mlib_ImageConvMxNIndex(3MLIB), mlib_ImageConvolveMxN(3MLIB),



SunOS 5.11           Last change: 2 Mar 2007                    2






mediaLib Library Functions          mlib_ImageConv2x2Index(3MLIB)



     mlib_ImageConvolveMxN_Fp(3MLIB),  mlib_ImageSConv3x3(3MLIB),
     mlib_ImageSConv3x3_Fp(3MLIB),     mlib_ImageSConv5x5(3MLIB),
     mlib_ImageSConv5x5_Fp(3MLIB),     mlib_ImageSConv7x7(3MLIB),
     mlib_ImageSConv7x7_Fp(3MLIB),
     mlib_ImageSConvKernelConvert(3MLIB), attributes(5)


















































SunOS 5.11           Last change: 2 Mar 2007                    3