下面是opencv b4.0 附带的 flood fill 算法的源代码样例，可以实现简单的彩色图像分割。
#ifdef _ch_
#pragma package <opencv>
#endif
#ifndef _eic
#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#include <stdlib.h>
#endif
iplimage* color_img0;
iplimage* mask;
iplimage* color_img;
iplimage* gray_img0 = null;
iplimage* gray_img = null;
int ffill_case = 1;
int lo_diff = 20, up_diff = 20;
int connectivity = 4;
int is_color = 1;
int is_mask = 0;
int new_mask_val = 255;
void on_mouse( int event, int x, int y, int flags )
{
if( !color_img )
return;
switch( event )
{
case cv_event_lbuttondown:
{
cvpoint seed = cvpoint(x,y);
int lo = ffill_case == 0 ? 0 : lo_diff;
int up = ffill_case == 0 ? 0 : up_diff;
int flags = connectivity + (new_mask_val << 8) +
(ffill_case == 1 ? cv_floodfill_fixed_range : 0);
int b = rand() & 255, g = rand() & 255, r = rand() & 255;
cvconnectedcomp comp;
if( is_mask )
cvthreshold( mask, mask, 1, 128, cv_thresh_binary );
if( is_color )
{
cvscalar color = cv_rgb( r, g, b );
cvfloodfill( color_img, seed, color, cv_rgb( lo, lo, lo ),
cv_rgb( up, up, up ), &comp, flags, is_mask ? mask : null );
cvshowimage( "image", color_img );
}
else
{
cvscalar brightness = cvrealscalar((r*2 + g*7 + b + 5)/10);
cvfloodfill( gray_img, seed, brightness, cvrealscalar(lo),
cvrealscalar(up), &comp, flags, is_mask ? mask : null );
cvshowimage( "image", gray_img );
}
printf("%g pixels were repainted\n", comp.area );
if( is_mask )
cvshowimage( "mask", mask );
}
break;
}
}
int main( int argc, char** argv )
{
char* filename = argc >= 2 ? argv[1] : (char*)"fruits.jpg";
if( (color_img0 = cvloadimage(filename,1)) == 0 )
return 0;
printf( "hot keys: \n"
"\tesc - quit the program\n"
"\tc - switch color/grayscale mode\n"
"\tm - switch mask mode\n"
"\tr - restore the original image\n"
