/*# proc: chr_x_hist - computes a horizontal spatial histogram from a# proc:              1 pixel per byte binary image.# proc: chr_y_hist - computes a vertical spatial histogram from a# proc:              1 pixel per byte binary image.*/#include <stdio.h>/*************************************************************************/chr_x_hist(data,width,height,bins,len)unsigned char *data;int width,height,**bins,*len;{   unsigned char *pptr;   int bnum, i, j;   calloc_int(bins, height, "chr_x_hist : binx");   pptr = data;   bnum = 0;   for(i = 0; i < height; i++){      for(j = 0; j < width; j++){         (*bins)[bnum] += *pptr;         pptr++;      }      bnum++;   }   *len = bnum;}/*************************************************************************/chr_y_hist(data,width,height,bins,len)unsigned char *data;int width,height,**bins,*len;{   unsigned char *pptr, *sptr;   int bnum, i, j;   calloc_int(bins, width, "chr_y_hist : binx");   sptr = data;   bnum = 0;   for(i = 0; i < width; i++){      pptr = sptr;      for(j = 0; j < height; j++){         (*bins)[bnum] += *pptr;         pptr+=width;      }      sptr++;      bnum++;   }   *len = bnum;}