title: Finding out if an URL is requested from adress bar or image src?
body: <p>Bit.ly allows you to view stats for short URLs by attaching a + sign at the end of the URL.</p>
  
  <p>Example:
  <a href="http://bit.ly/1dAtI4q" rel="nofollow">http://bit.ly/1dAtI4q</a></p>
  
  <p>To look up Stats:
  <a href="http://bit.ly/1dAtI4q+" rel="nofollow">http://bit.ly/1dAtI4q+</a></p>
  
  <p>My question is, if I include this URL in an image src attribute like this:</p>
  
  <pre><code>&lt;img src="http://bit.ly/1dAtI4q"&gt; 
  </code></pre>
  
  <p>and embed this image on a page and request the page, the stats from bit.ly do not count this request as a click.</p>
  
  <p>They do however count visiting the URL via the browser by pasting the URL in the address bar of the browser.</p>
  
  <p><strong>Question:
  How do they distinguish between the URL is embedded in an image SRC and someone is visiting the URL?</strong></p>