title: Place an image on an image
body: <p>I want to place an image on a captured video frame at the coordinates which I determined. </p>
  
  <p>I asked that before and I have been told to use <code>cvCopy</code> and <code>cvSetImageROI</code> but I dont want to crop on those coordinates I want to add another image. 
  Maybe it's the right way but I didn't understand it (if its right please explain it).</p>