OpenCV中SimpleBlobDetector的使用

C++代码

#include 
#include 
using namespace cv;
using namespace std;
int main()
{
	Mat image = imread("path to image", IMREAD_GRAYSCALE);
	Mat src;
	medianBlur(image, image, 5);
	threshold(image, src, 150, 255, cv::THRESH_BINARY);
	// 初始化BLOB参数
	SimpleBlobDetector::Params params;
	params.minDistBetweenBlobs = 0.0f;
	params.filterByInertia = false;
	params.filterByConvexity = false;
	params.filterByColor = false;
	params.filterByCircularity = false;
	params.filterByArea = false;
	// 声明根据面积过滤，设置最大与最小面积
	params.filterByArea = true;
	params.minArea = 3000.0f;
	params.maxArea = 22000.0f;
	// 声明根据圆度过滤，设置最大与最小圆度
	params.filterByCircularity = true;
	params.minCircularity = 0.7;
	params.maxCircularity = 1.0;
	// 凸包形状分析 - 过滤凹包
	//params.filterByConvexity = true; 
	//params.minConvexity = 0.5;
	//params.minConvexity = 1.0;
	// 参数初始化BLOB检测器，
	Ptr detector = SimpleBlobDetector::create(params);
	vector keypoints;
	// 检测得到特征与绘制特征
	detector->detect(src, keypoints, Mat());
	Mat kp_image;
	drawKeypoints(src, keypoints, kp_image, Scalar(255, 0, 0), DrawMatchesFlags::DRAW_RICH_KEYPOINTS);	
	cout << "半径：" << keypoints[0].size/2 << endl;
	cout << "圆心坐标：" << keypoints[0].pt << endl;
	imshow("keypoints", kp_image);
	waitKey(0);
	return 0;
}