我正在尝试使用以下问题中的代码执行特征匹配：OpenCV filtering ORB matches
ORB检测有效，但在Feature2D和任何导入中均找不到描述符提取器和描述符匹配器
OpenCV 4中有哪些替代品？如何使用它们？
OpenCV文档没有提供任何帮助或源代码，很遗憾https://docs.opencv.org/4.x/d5/d51/group__features2d__main.html
谢谢你，

MatOfKeyPoint keypoints = new MatOfKeyPoint();
ORB detector = ORB.create();

DescriptorExtractor descriptor = DescriptorExtractor.create(DescriptorExtractor.ORB);;
DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);

// First photo
Imgproc.cvtColor(img1, img1, Imgproc.COLOR_RGB2GRAY);
Mat descriptors1 = new Mat();
MatOfKeyPoint keypoints1 = new MatOfKeyPoint();

detector.detect(img1, keypoints1);
descriptor.compute(img1, keypoints1, descriptors1);

// Second photo
Imgproc.cvtColor(img2, img2, Imgproc.COLOR_RGB2GRAY);
Mat descriptors2 = new Mat();
MatOfKeyPoint keypoints2 = new MatOfKeyPoint();

detector.detect(img2, keypoints2);
descriptor.compute(img2, keypoints2, descriptors2);

// Matching

MatOfDMatch matches = new MatOfDMatch();
MatOfDMatch filteredMatches = new MatOfDMatch();
matcher.match(descriptors1, descriptors2, matches);

List<DMatch> matchesList = matches.toList();