Android：OpenCv比较两个图像的问题

Question

I want to compare two image in percent in android , here is my codes

Mat img1 = Highgui.imread("storage/external_SD/a.png");
Mat img2 = Highgui.imread("storage/external_SD/b.png");
MatOfKeyPoint keypoints1 = new MatOfKeyPoint();
MatOfKeyPoint keypoints2 = new MatOfKeyPoint();
Mat descriptors1 = new Mat();
Mat descriptors2 = new Mat();

//Definition of ORB keypoint detector and descriptor extractors
FeatureDetector detector = FeatureDetector.create(FeatureDetector.ORB); 
DescriptorExtractor extractor = DescriptorExtractor.create(DescriptorExtractor.ORB);

//Detect keypoints
detector.detect(img1, keypoints1);
detector.detect(img2, keypoints2);  
//Extract descriptors
extractor.compute(img1, keypoints1, descriptors1);
extractor.compute(img2, keypoints2, descriptors2);

//Definition of descriptor matcher
DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);

//Match points of two images
MatOfDMatch matches = new MatOfDMatch();
matcher.match(descriptors1,descriptors2 ,matches);

For example my method out put should be :

Images is 90% same

But i dont know what should i do after matcher.match(descriptors1,descriptors2 ,matches); method, can you please advise me ?

Answer 1

As I remember method match() must return value of double or float . I did same thing with face comparison and I did (according to your case):

double value = matcher.match(descriptors1,descriptors2 ,matches);

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