霍夫圆检测

#include"pch.h"
#include<iostream>
#include<opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main(int argc, char **argv)
{
    Mat src, dst;
    src = imread("2.jpg");
    if (!src.data)
    {
        printf("Error\n");
        return -1;
    }

    char INPUT_TITLE[] = "input_image";
    char OUTPUT_TITLE[] = "hough_circle_demo";
    namedWindow(INPUT_TITLE, CV_WINDOW_AUTOSIZE);
    namedWindow(OUTPUT_TITLE, CV_WINDOW_AUTOSIZE);
    imshow(INPUT_TITLE, src);

    //中值滤波
    Mat mlf_opt;
    medianBlur(src, mlf_opt, 3);//ksize取3
    cvtColor(mlf_opt, mlf_opt, CV_BGR2GRAY);

    //霍夫圆检测
    vector<Vec3f> pcircles;//可能的圆心
    HoughCircles(mlf_opt, pcircles, CV_HOUGH_GRADIENT, 1, 10, 100, 35, 5, 50);
    cout << pcircles[1] << endl;
    src.copyTo(dst);
    for (size_t i = 0; i < pcircles.size(); ++i)
    {
        Vec3f cc = pcircles[i];
        circle(dst, Point(cc[0], cc[1]), cc[2], Scalar(0, 0, 255), 2, LINE_AA);
        circle(dst, Point(cc[0], cc[1]), 1, Scalar(198, 20, 255), 2, LINE_AA);

    }
    imshow(OUTPUT_TITLE, dst);
    waitKey(0);
    return 0;
}