code: def find_sift(im_source, im_search, min_match_count=4):
      '''
      SIFT特征点匹配
      '''
      res = find_all_sift(im_source, im_search, min_match_count, maxcnt=1)
      if not res:
          return None
      return res[0f find_sift(im_source, im_search, min_match_count=4):
      '''
      SIFT特征点匹配
      '''
      res = find_all_sift(im_source, im_search, min_match_count, maxcnt=1)
      if not res:
          return None
      return res[0]
docs: SIFT特征点匹配