mediaLib Library Functions              mlibImageExtrema2(3MLIB)



NAME
     mlibImageExtrema2, mlibImageExtrema2Fp - image extrema

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

     mlibstatus mlibImageExtrema2(mlibs32 *min, mlibs32 *max,
          const mlibimage *img, mlibs32 xStart, mlibs32 yStart,
          mlibs32 xPeriod, mlibs32 yPeriod);


     mlibstatus mlibImageExtrema2Fp(mlibd64 *min, mlibd64 *max,
          const mlibimage *img, mlibs32 xStart, mlibs32 yStart,
          mlibs32 xPeriod, mlibs32 yPeriod);


DESCRIPTION
     Each of the functions determines the extrema values for each
     channel in an image, possibly with subsampling.


     It uses the following equation:

       min[i] = MIN{ img[x][y][i] }
       max[i] = MAX{ img[x][y][i] }



     where

       x = xStart ] p*xPeriod;  0 < p < (w - xStart)/xPeriod
       y = yStart ] q*yPeriod;  0 < q < (h - yStart)/yPeriod


PARAMETERS
     Each of the functions takes the following arguments:

     min        Pointer to minimum vector, where  length  is  the
                number  of channels in the image. min[i] contains
                the minimum of channel i.


     max        Pointer to maximum vector, where  length  is  the
                number  of channels in the image. max[i] contains
                the maximum of channel i.


     img        Pointer to a source image.






SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions              mlibImageExtrema2(3MLIB)



     xStart     Initial X sample coordinate.


     yStart     Initial Y sample coordinate.


     xPeriod     X sample rate. xPeriod > 1.


     yPeriod     Y sample rate. yPeriod > 1.


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

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



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


SEE ALSO
     mlibImageExtremaLocations(3MLIB), mlibImageMaximum(3MLIB),
     mlibImageMaximumFp(3MLIB),       mlibImageMinimum(3MLIB),
     mlibImageMinimumFp(3MLIB), attributes(5)




















SunOS 5.11           Last change: 2 Mar 2007                    2