title: chamfer distance transform for skeletonization
body: <p>are there any functions or libraries implemented in python for computing the image skeleton (skeletonization) using chamfer distance transform?</p>
  
  <p>the following link is an example of chamfer distance transform:
  <a href="http://www.inf.u-szeged.hu/~palagyi/skel/chamfer34.gif" rel="nofollow noreferrer">http://www.inf.u-szeged.hu/~palagyi/skel/chamfer34.gif</a></p>
  
  <p>Thank you</p>