title: How to find the distance between two concentric contours, for different angles?
body: <p>I have an image with two contours, where one contour is always 'inside' another. I want to find the distance between the two contours for 90 different angles (meaning, distance at every 4 degrees). How do I go about doing it?</p>
  
  <p>Here's an example image:</p>
  
  <p><a href="https://i.stack.imgur.com/G48xu.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/G48xu.jpg" alt="enter image description here"></a></p>
  
  <p>Thank you!</p>