title: Vehicle tracking by modifying camshift
body: <p>I found this line of code in the openCV sample file for camshift and I am wondering whether is this the line which initiate the circle for tracking the object? </p>
  
  <pre><code>int val = cvRound( cvGetReal1D(hist-&gt;bins,i)*histimg-&gt;height/255 );
  </code></pre>
  
  <p>Also, could the camshift function used for rectangle object instead of faces ?</p>