title: How can I change the background color of the image?
body: <p>I want to <code>remove/change</code> the background color of an image in Matlab.</p>
  
  <p>Anyone know how to do this?</p>
  
  <p>Here is an example image, I want to remove the green background color.  </p>
  
  <p><a href="https://i.stack.imgur.com/C4kR8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C4kR8.jpg" alt=""></a><br>
  <sub>(source: <a href="http://cdn4.frip.in/wp-content/uploads/2013/05/custom-widget-area-for-wordpress.jpg" rel="nofollow noreferrer">frip.in</a>)</sub>  </p>