title: n camera calibration using opencv
body: <p>I am building a 3D tracking system that uses up to 12 cameras. I understand the OpenCV function <code>StereoCalibrate</code> can find the relative position and orientation of two cameras. I need to do this for 12 cameras. Is there a OpenCV function or available source code that can achieve the desired result?</p>
  
  <p>I am using the <code>StereoCalibrate</code> function and simply apply it to all combinations of pairs of cameras. Is their a more efficient way?</p>