OpenCV 绘制填充矩形

OpenCV 提供了填充多边形函数fillPoly, 可以通过fillPoly绘制填充矩形:

    Mat mat = Mat::zeros(1048, 1048, CV_8UC3);//创建一个Mat
    cv::Point rookPoints[1][4];
    rookPoints[0][0] = Point(100, 100);//左上角
    rookPoints[0][1] = Point(400, 100);//右上角
    rookPoints[0][2] = Point(400, 400);//右下角
    rookPoints[0][3] = Point(100, 400);//左下角
    int npt[]={4};//二维数组 每列长度
    const Point* ppt[1] = {rookPoints[0]};//所有多边形点坐标
    fillPoly(mat, ppt, npt, 1, Scalar(0, 0, 255));



    imshow("", mat);
    waitKey(0);

 

参考CSDN: https://blog.csdn.net/xueluowutong/article/details/80915966