C++ OpenCV标记函数drawMarker的使用

void cv::drawMarker  (  InputOutputArray   img,  --源图像
                        Point   position,  --要画的坐标点
                        const Scalar &   color, --颜色
                        int   markerType = MARKER_CROSS, --标记类型
                        int   markerSize = 20,  --标记大小
                        int   thickness = 1,   --线条粗细
                        int   line_type = 8 )  

#include<iostream>
#include<opencv2/opencv.hpp>

using namespace cv;
using namespace std;

int main(int argc, char** argv) {
  //创建一个的空Mat
  Mat src = Mat::zeros(240, 120, CV_8UC3);

  //画蓝色十字
  drawMarker(src, Point(60, 30), Scalar(255, 0, 0), MarkerTypes::MARKER_CROSS, 20, 3, 8);
  //画绿色钻石
  drawMarker(src, Point(60, 60), Scalar(0, 255, 0), MarkerTypes::MARKER_DIAMOND, 20, 3, 8);
  //画红色正方形
  drawMarker(src, Point(60, 90), Scalar(0, 0, 255), MarkerTypes::MARKER_SQUARE, 20, 3, 8);
  //画紫色星形
  drawMarker(src, Point(60, 120), Scalar(255, 0, 255), MarkerTypes::MARKER_STAR, 20, 3, 8);
  //画浅蓝色叉
  drawMarker(src, Point(60, 150), Scalar(255, 255, 0), MarkerTypes::MARKER_TILTED_CROSS, 20, 3, 8);
  //画黄色向下箭头
  drawMarker(src, Point(60, 180), Scalar(0, 255, 255), MarkerTypes::MARKER_TRIANGLE_DOWN, 20, 3, 8);
  //画白色向上箭头
  drawMarker(src, Point(60, 210), Scalar(255, 255, 255), MarkerTypes::MARKER_TRIANGLE_UP, 20, 3, 8);

  //显示图像
  imshow("src", src);
  waitKey(0);
  return 0;
}