如何显示相应的关键点？

Question

我想在控制台中显示KeyPoints的相应大小和角度。我知道如何检测它，但我不知道什么是正确的索引显示。我想获得像keypoints1.size和keypoints1.angle的结果类似于keypoints2.size和keypoints2.angle。下面我开始了程序：

SurfFeatureDetector detector(400);
vector<KeyPoint> keypoints1, keypoints2;
detector.detect(img1,keypoints1);
detector.detect(img2,keypoints2);

SurfDescriptorExtractor extractor;
Mat descriptors1, descriptors2;
extractor.compute(img1,keypoints1,descriptors1);
extractor.compute(img2,keypoints2,descriptors2);

BruteForceMatcher<L2<float> > matcher;
vector<DMatch> matches;
matcher.match(descriptors1, descriptors2, matches);

Answer 1

你可以这样做：

for(auto& m : matches) {
  cout << "Keypoints 1 angle: " << keypoints1[m.queryIdx].angle << endl;
  cout << "Keypoints 2 angle: " << keypoints2[m.trainIdx].angle << endl;
}

更改.angle属性以显示您需要的内容