opencv任意形状ROI

相关代码，比较简单，一看就懂：

Mat srcImg = imread("lena.jpg");Mat dstImg;Mat mask = Mat::zeros(srcImg.size(),CV_8UC1);vector<vector<Point>> contour;vector<Point> pts;pts.push_back(Point(30,45));pts.push_back(Point(500,35));pts.push_back(Point(430,240));pts.push_back(Point(50,250));contour.push_back(pts);drawContours(mask,contour,0,Scalar::all(255),-1);srcImg.copyTo(dstImg,mask);imshow("src",srcImg);imshow("mask",mask);imshow("roi",dstImg);waitKey();

结果：

备注：如果是凸包轮廓，可用fillConvexPoly