title: Regarding use of cvStereorectify
body: <p><br>
  I am trying to use cvstereorectify (<a href="http://opencv.willowgarage.com/documentation/camera_calibration_and_3d_reconstruction.html#stereorectify" rel="nofollow">link</a>) to give me the Q matrix that I could then use back in cvReprojectImageto3D.
  In the documentation of cvstereorectify though I am unsure how to get the R &amp; T- The rotation matrix and the translation vector between the two cameras.Are there any methods that can help me do this? Any guidance is appreciated.</p>