title: How can I implement a fisheye lens effect (barrel transformation) in MATLAB?
body: <p>How can one implement the fisheye lens effect illustrated in that image:</p>
  
  <p><img src="https://i.stack.imgur.com/EuFFJ.jpg" alt="fisheye example"></p>
  
  <p>One can use Google's logo for a try:</p>
  
  <p><img src="https://www.google.com/intl/en_ALL/images/srpr/logo1w.png" alt="alt text"></p>
  
  <p>BTW, what's the term for it?</p>