opencvfillPoly填充的多边形

    cv::Mat img(500, 500, CV_8UC3, cv::Scalar(0,0,0));

    cv::Point root_points[1][4];
    root_points[0][0] = cv::Point(215, 220);
    root_points[0][1] = cv::Point(460, 225);
    root_points[0][2] = cv::Point(466, 450);
    root_points[0][3] = cv::Point(235, 465);

    const cv::Point* ppt[1] = { root_points[0] };
    int npt[] = { 4 };
    cv::fillPoly(img, ppt, npt, 1, cv::Scalar(255,0,0));
    /*
    参数1：作为画布的矩阵
    参数2：pts 折线顶点数组
    参数3：npts 折线顶点个数
    参数4：待绘制折线数
    参数5：折线的颜色
    */
    imshow("Test", img);
    cv::waitKey();