title: scikit image contour completion
body: <p>I am working with the following image.</p>
  
  <p><a href="https://i.stack.imgur.com/2iJm3.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2iJm3.jpg" alt="Concentric Contours"></a></p>
  
  <p>My aim is to get the curvature of the outermost circle in the central part of the image.</p>
  
  <p><strong>AFTER CANNY EDGE FILITER</strong></p>
  
  <p><a href="https://i.stack.imgur.com/qf7td.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qf7td.jpg" alt="CANNY EDGE FILTER"></a></p>
  
  <p>My focus is the concentric circles in the center of the image.
  I need to be able to get the radius of curvature of the outermost circle.
  I have tried find_contours, but it produces thousands of colored disconnected contours. </p>
  
  <p>Regards,
  Richard Madson</p>