C++ opencv检测圆

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

using namespace cv;
using namespace std;

int main(int argc, char** argv)
{
    // 读取图像
    Mat src = imread(argv[1], IMREAD_COLOR);
    if (!src.data) {
        cout << "Could not open or find the image" << endl;
        return -1;
    }

    // 转换为灰度图像
    Mat gray;
    cvtColor(src, gray, COLOR_BGR2GRAY);

    // 使用Canny边缘检测
    Mat edges;
    Canny(gray, edges, 50, 200);

    // 使用Hough变换检测圆
    vector<Vec3f> circles;
    HoughCircles(edges, circles, CV_HOUGH_GRADIENT, 1, gray.rows/8, 200, 100, 0, 0);

    // 在原图上绘制检测到的圆
    for (size_t i = 0; i < circles.size(); i++) {
        Point center(cvRound(circles[i][0]), cvRound(circles[i][1]));
        int radius = cvRound(circles[i][2]);
        circle(src, center, radius, Scalar(0,255,0), 2, FILLED);
    }

    // 显示结果
    namedWindow("Detected circles", WINDOW_AUTOSIZE);
    imshow("Detected circles", src);
    waitKey(0);

    return 0;
}