OpenCV设置感兴趣区域(roi)

int main( int argc, char** argv )
{
    //导入图像
    IplImage *img1 = cvLoadImage("QQ图片20131211141620.jpg", 1);
    //设置感兴趣区域
    cvSetImageROI(img1, cvRect(10, 15, 150, 250));
    //感兴趣区域大小一样
    IplImage *img2 = cvCreateImage(cvGetSize(img1),img1->depth,img1->nChannels);
    //拷贝
   cvCopy(img1, img2, NULL);
 
   //重置
   cvResetImageROI(img1);

   cvNamedWindow("img1");
   cvNamedWindow("img2");
   cvShowImage("img1",img1);
   cvShowImage("img2",img2);

   cvWaitKey(0);
   cvDestroyAllWindows();
   cvReleaseImage(&img1);
   cvReleaseImage(&img2);
}

int main( int argc, char** argv )
{
    //导入图像
    Mat img1 = imread("QQ图片20131211141620.jpg", 1);
    Mat img2(img1.rows,img1.cols,CV_8UC3);

    //设置感兴趣区域,拷贝
     img1(Rect(10, 15, 150, 250)).copyTo(img2);

     //显示
     imshow("img1",img1);
     imshow("img2",img2);
     waitKey(0);
}