title: Is there any way to implement this beautiful image effect？
body: <p>Recently I found an amazing APP called Photo Lab,and I'm curious about one effect called Paper Rose.In the pictures below，one is the original picture，the other is the effected picture.My question is what kind of algorithm can do this effect,and it would be better if you can show me some code or demo.Thanks in advance!
  <a href="https://i.stack.imgur.com/k4Rh5.jpg" rel="nofollow noreferrer">enter image description here</a>  </p>
  
  <p><a href="https://i.stack.imgur.com/Sxfcv.jpg" rel="nofollow noreferrer">enter image description here</a></p>