title: Classifying lines with opencv
body: <p>I'm working on an image classification project, I've extracted curved lines from image using edge-detection, and need to classify them based on their curvature.</p>
  
  <p>For example in the image below there are 3 kinds of line, the left line has a good curvature, the middle one has a not-bad curvature, and the right line has a very-bad curvature.</p>
  
  <p><img src="https://i.stack.imgur.com/tDjXw.jpg" alt="curves"></p>
  
  <p>Thanks for your help</p>