title: How does camshift tracking work compared to meanshift
body: <p>I know, how meanshift works for tracking objects:</p>
  
  <ol>
  <li>Histogram of region of interest</li>
  <li>Backprojection image</li>
  <li>calculating center of mass</li>
  <li>iterativ adaption of the ROI's center to the center of mass</li>
  </ol>
  
  <p>But how can the camshift algorithm solve the problem of changing the objects size (e.g. if it moves towards the camera)?</p>
  
  <p>I tried to find some help on Wikipedia, but its written in french and there is no other language available.</p>