title: Get HOG image features from OpenCV + Python?
body: <p>I've read this post about how to use OpenCV's HOG-based pedestrian detector:   <a href="https://stackoverflow.com/questions/2188646/how-can-i-detect-and-track-people-using-opencv">How can I detect and track people using OpenCV?</a></p>
  
  <p>I want to use HOG for detecting other types of objects in images (not just pedestrians).  However, the Python binding of <em>HOGDetectMultiScale</em> doesn't seem to give access to the actual HOG features.  </p>
  
  <p>Is there any way to use Python + OpenCV to extract the HOG features directly from any image?</p>