title: use SIFT or ORB for template match
body: <p>with inspire of this tutorial:
  <a href="https://docs.opencv.org/3.0-beta/doc/py_tutorials/py_feature2d/py_matcher/py_matcher.html" rel="nofollow noreferrer">Feature Matching</a>, I'm trying to do template matching and clustering of image set I have. </p>
  
  <p>The dataset I have in most of it, the image is straight ( maybe 10-degree rotate max ) 
  I would like to use this information to have better matches, 
  I have noticed that sometimes I have a false match that when I display the match I can see the match vectors are all in different angles (not straight line ) how can I check if the match it's got is a straight line or rotate?</p>
  
  <p>Thanks for the help</p>