CHDK - альтернативная прошивка

void patch_bad_pixel(unsigned int x,unsigned  int y){
  int sum=0;
  int nzero=0;
  int i,j;
  int val;
  if ((x>=2) && (x<CAM_RAW_ROWPIX-2) && (y>=2) && (y<CAM_RAW_ROWS-2)) {
   if ((conf.bad_pixel_removal==1) || conf.dng_raw) {  // interpolation or DNG saving  
    for (i=-2; i<=2; i+=2)
     for (j=-2; j<=2; j+=2)  
      if ((i!=0) && (j!=0)) {
       val=get_raw_pixel(x+i, y+j);
       if (val) {sum+=val; nzero++;}
      }
    if (nzero) set_raw_pixel(x,y,sum/nzero);
   }
   else if (conf.bad_pixel_removal==2)  // or this makes RAW converter (internal/external)  
    set_raw_pixel(x,y,0);    
  }
}