使用conda的简单安装 conda install -c menpo opencv 测试
>>> import cv2
>>> import numpy as np
>>> img=cv2.imread('/home/SENSETIME/xiaxuesong/Pictures/Selection_004.png')
>>> sift = cv2.SIFT()
>>> kp1, des1 = sift.detectAndCompute(img, None)
特征提取的Python实现 https://blog.csdn.net/amusi1994/article/details/79591205 特征介绍： https://blog.csdn.net/c2a2o2/article/details/70053787 https://blog.csdn.net/u011746554/article/details/70941268
