opencv学习——cv2.xfeatures2d.SIFT_create().detectAndCompute()

import cv2
import numpy as np

def SIFT(img):
    I =  cv2.imread(img)
#    gray = cv2.cvtColor(I, cv2.COLOR_BGR2GRAY)
    descriptor = cv2.xfeatures2d.SIFT_create()
    (kps, features) = descriptor.detectAndCompute(I, None)
#    kps = np.float32([kp.pt for kp in kps])
cv2.drawKeypoints(I,kps,I,(0,255,255),flags=cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
#    cv2.drawKeypoints(I,kps,I,(0,255,255))
    cv2.imwrite('sift_keypoints.jpg',I)

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