title: How can one easily detect whether 2 ROIs intersects in OpenCv?
body: <p>I am trying to detect whether 2 Regions of Interest (<code>CvRect</code>s) are intersecting one another in OpenCV. I can obviously manually type several (or rather a lot of) conditions to be checked but that wouldn't really be a good way to do it (imo). </p>
  
  <p>Can anyone suggest me any other solution? Is there a ready method in OpenCV for that ? </p>