How to use SIFT detector and SURF descriptor in opencv?

Multi tool use
Multi tool use


How to use SIFT detector and SURF descriptor in opencv?



I want to use a SIFT detector and SURF descriptor. However, I just know how to use a SIFT / SURF detector and descriptor to compute similarity of two images but not the combination of them.



Here is the code for SIFT detector and descriptor:


sift = cv2.xfeatures2d.SIFT_create()
img_a = cv2.imread('a.jpg')
img_b = cv2.imread('b.jpg')
kp_des_a = sift.detectAndCompute(img_a , None)[1]
kp_des_b = sift.detectAndCompute(img_b , None)[1]
bf = cv2.BFMatcher()
matches = bf.knnMatch(kp_des_a, kp_des_b, k=2)
good = [m for m, n in matches if m.distance < 0.7*n.distance]
score = len(good)



How to use SIFT detector and SURF descriptor?





I haven't used python interface. So I could be wrong here. But you can try detecting keypoints using sift.detect(). Then try using surf.compute() to get the descriptors.
– dhanushka
Jul 3 at 9:45



sift.detect()


surf.compute()









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