Does anyone have any examples of using OpenCV with python for descriptor extraction?

Question

I\'m trying to use OpenCV to extract SURF descriptors from an image. I\'m using OpenCV 2.4 and Python 2.7, but am struggling to find any documentation that provides any informat

Answer 1

Using open cv 2.4.3, you can do the following:

import cv2
surf = cv2.SURF()
keypoints, descriptors = surf.detectAndCompute(img,None,useProvidedKeypoints = True)