Fast corner detection

最新推荐文章于 2020-11-25 22:05:01 发布

原创最新推荐文章于 2020-11-25 22:05:01 发布 · 2.3k 阅读

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本文详细介绍了如何使用Fast特征检测器在图像中检测关键点，并通过OpenCV库进行图像处理，包括关键点检测、绘制和显示过程。

int _tmain(int argc, _TCHAR* argv[]) {
	Mat img = imread("LenaGr.jpg", 0);

	//vector of KeyPoints
	vector<KeyPoint> keyPoints;

	//construction of the fast feature detector object
	FastFeatureDetector fast(40);
	//feature point detection
	fast.detect(img, keyPoints);
	
	drawKeypoints(img, keyPoints, img, Scalar::all(-1), DrawMatchesFlags::DEFAULT);
	
	//output all the (x,y) of keypoint
	vector<KeyPoint>::iterator it;

	for(it = keyPoints.begin(); it != keyPoints.end(); ++it) {
		printf("x=%f y=%f\n", it->pt.x, it->pt.y);
	}

	namedWindow("img", WINDOW_AUTOSIZE);
	imshow("img", img);

	waitKey(0);
	return 0;
}