opencv中roi嵌套

来源：互联网发布：windows10的编程软件编辑：程序博客网时间：2024/05/21 09:08

问题：在opencv中，取一幅图像src的子区间roi，在该roi里面分析，得到子区间roi的子区间roi2。如何把子区间里面的roi2的坐标还原到src。

解决：函数在下面给出，相关主函数自行添加

void RoiTest(){char  filename[100];int count=1;Mat src;Mat subsrc;Rect grinder_test_roi;Rect sub_test_roi;Rect dst_test_roi;sprintf(filename,"D:/frame3/%04d.jpg",count);src=imread(filename);if(!src.data){return;}grinder_test_roi.y=cvRound(src.rows/2.5);//行起始点坐标grinder_test_roi.x=0;//列起始点坐标grinder_test_roi.height=src.rows-grinder_test_roi.y;grinder_test_roi.width=cvRound(src.cols/2);rectangle(src, grinder_test_roi.tl(), grinder_test_roi.br(), Scalar(0,255,0), 3);//imshow("grinderRoi",src);subsrc=src(grinder_test_roi);sub_test_roi.y=cvRound(subsrc.rows/2.5);sub_test_roi.x=0;sub_test_roi.height=subsrc.rows-sub_test_roi.y;sub_test_roi.width=cvRound(subsrc.cols/2);rectangle(subsrc, sub_test_roi.tl(), sub_test_roi.br(), Scalar(0,0,255), 3);imshow("subRoi",subsrc);dst_test_roi.y=sub_test_roi.y+grinder_test_roi.y;//坐标还原过程dst_test_roi.x=sub_test_roi.x+grinder_test_roi.x;dst_test_roi.height=sub_test_roi.height;dst_test_roi.width=sub_test_roi.width;rectangle(src, dst_test_roi.tl(), dst_test_roi.br(), Scalar(255,0,0), 3);imshow("grinderRoi",src);waitKey();}

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