#include <opencv2/highgui.hpp>
#include <opencv2/calib3d.hpp>
#include <iostream>
using namespace std;
using namespace cv;
int main(){
Mat img = imread("blob.jpg",IMREAD_GRAYSCALE);
/*
SimpleBlobDetector::Params params;
//阈值控制
params.minThreshold = 10;
params.maxThreshold = 200;
//像素面积大小控制
params.filterByArea = true;
params.minArea = 1000;
//形状（凸）
params.filterByCircularity = false;
params.minCircularity = 0.7;
//形状（凹）
params.filterByConvexity = true;
params.minConvexity = 0.9;
//形状（园）
params.filterByInertia = false;
params.minInertiaRatio = 0.5;
*/
Ptr<SimpleBlobDetector> detector = SimpleBlobDetector::create();
vector<KeyPoint> keypoints;
detector->detect(img,keypoints);
Mat img_with_keypoints;
drawKeypoints(img,keypoints,img_with_keypoints,Scalar(0,0,255),DrawMatchesFlags::DRAW_RICH_KEYPOINTS);
imshow("keypoints",img_with_keypoints);
waitKey(0);
return 0;
}
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