1、測試代碼

void test2() {
    Mat src = imread("D:/1.jpg");
    // 線
    line(src, Point(50, 50), Point(200, 200), Scalar(0, 255, 0), 2, CV_AA);
    // 橢圓
    ellipse(src, Point(src.size().width / 2, src.size().height / 2), Size(src.size().width / 4, src.size().height / 16),-30, 0, 360, Scalar(255, 0, 0), 2, CV_AA);
    // 圓
    circle(src, Point(200, 200), 30, Scalar(0, 0, 255), 2, CV_AA);
    // 多邊形
    Point rookPoint[1][5];
    rookPoint[0][0] = Point(50, 300);
    rookPoint[0][1] = Point(80, 300);
    rookPoint[0][2] = Point(100, 325);
    rookPoint[0][3] = Point(80, 350);
    rookPoint[0][4] = Point(50, 350);
    const  Point *ppt[1] = { rookPoint[0] };
    int npt[] = {5};
    fillPoly(src, ppt, npt,1,Scalar(255, 255, 0), CV_AA);
    imshow("212", src);
    imwrite("D:/result.jpg", src);
}

原圖.jpg

效果圖.jpg