title: Image segmentation (OCT)
body: <p>My image is something like below:</p>
  
  <p><a href="https://i.stack.imgur.com/ZhaIr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZhaIr.png" alt="enter image description here"></a></p>
  
  <p>I want to be able to draw 2 layers: (1) red line on <strong>top</strong> of 1st layer, but (2) blue line in the <strong>middle</strong> of 2nd layer</p>
  
  <p>I am using OpenCV. but any languages/advice are welcomed. </p>