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Python3 AttributeError: module 'cv2' has no attribute 'SIFT'_attributeerror: 'cv2.sift' object has no attribute

attributeerror: 'cv2.sift' object has no attribute 'compare

问题:在用python3使用sift = cv2.SIFT()进行SIFT时候,可能会产生错误:AttributeError: module 'cv2' has no attribute 'SIFT'

  1. import numpy as np
  2. import cv2
  3. from matplotlib import pyplot as plt
  4. img1 = cv2.imread('data/queryImage.jpg', 0) # queryImage
  5. img2 = cv2.imread('data/trainImage.jpg', 0) # trainImage
  6. # Initiate SIFT detector
  7. sift = cv2.SIFT()
  8. # find the keypoints and descriptors with SIFT
  9. kp1, des1 = sift.detectAndCompute(img1, None)
  10. kp2, des2 = sift.detectAndCompute(img2, None)

报错信息: AttributeError Traceback (most recent call last) <ipython-input-38-d0b969ce1567> in <module>() 5 img2 = cv2.imread('data/trainImage.jpg', 0) # trainImage 6 # Initiate SIFT detector ----> 7 sift = cv2.SIFT() 8 # find the keypoints and descriptors with SIFT 9 kp1, des1 = sift.detectAndCompute(img1, None) AttributeError: module 'cv2' has no attribute 'SIFT'

解决:将sift = cv2.SIFT()替换为:sift = cv2.xfeatures2d.SIFT_create()

分析:opencv将SIFT等算法整合到xfeatures2d集合里面了。写法:sift = cv2.xfeatures2d.SIFT_create()

变更样例:

  1. import numpy as np
  2. import cv2
  3. from matplotlib import pyplot as plt
  4. img1 = cv2.imread('data/queryImage.jpg', 0) # queryImage
  5. img2 = cv2.imread('data/trainImage.jpg', 0) # trainImage
  6. # Initiate SIFT detector
  7. #sift = cv2.SIFT() 将sift = cv2.SIFT()替换为:sift = cv2.xfeatures2d.SIFT_create()
  8. sift = cv2.xfeatures2d.SIFT_create()
  9. # find the keypoints and descriptors with SIFT
  10. kp1, des1 = sift.detectAndCompute(img1, None)
  11. kp2, des2 = sift.detectAndCompute(img2, None)

说明:问题产生的环境
  Python版本:3.6.5
  OpenCV版本:3.4.2

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