opencv霍夫圆变换

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


using namespace cv;
using namespace std;
int main(int argc, char** argv) {
Mat src, dst;
src = imread("3.jpg");
if (!src.data) {
printf("could not load image...\n");
return -1;
}
char INPUT_TITLE[] = "input image";
char OUTPUT_TITLE[] = "hough circle demo";
namedWindow(INPUT_TITLE, CV_WINDOW_NORMAL);
namedWindow(OUTPUT_TITLE, CV_WINDOW_NORMAL);
imshow(INPUT_TITLE, src);


// 中值滤波
Mat moutput;
medianBlur(src, moutput, 3);
cvtColor(moutput, moutput, CV_BGR2GRAY);


// 霍夫圆检测
vector<Vec3f> pcircles;
HoughCircles(moutput, pcircles, CV_HOUGH_GRADIENT, 1, 10, 100, 30, 5,50);
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), 2,8);
circle(dst, Point(cc[0], cc[1]), 2, Scalar(198, 23, 155), 2, 8);
}
imshow(OUTPUT_TITLE, dst);


waitKey(0);
return 0;
}