OPENCV切割图像

#if 1

#include <opencv/highgui.h> 
IplImage* src;  
IplImage* dst;  
int main(int argc , char** argv )  
{  
int y,x;
char filename[256]="";
src = cvLoadImage("D:\\lena.bmp",1);  
if(!src)  
printf("Error"); 
cvNamedWindow("ԴͼÏñ",1);  
cvShowImage("ԴͼÏñ",src);  
for(y=0;y<src->height - 50;y=y+50)
{
for(x=0;x<src->width-50;x=x+50)
{
sprintf(filename ,"E:\\pic2\\%d.bmp", (y/50)*10+x/50 );
cvSetImageROI(src,cvRect(x,y,50,50));  
dst = cvCreateImage(cvSize(50,50),  
IPL_DEPTH_8U,  
src->nChannels);  
cvCopy(src,dst);

cvSaveImage(filename,dst);

cvResetImageROI(src);  
cvReleaseImage(&dst); 
}