title: Distance measurement using Stereo vision opencv python
body: <p>i want to measure distance of a object using a stereo camera set, till now i have calibrated and rectified my camera , generated disparity map.Using opencv stereo_match.
  But i am stuck on how to move forward to find the distance of an object in the image using disparity matrix.
  Also i am in doubt about the disparity matrix, can someone please explain it.What is the content of it.
  Also how to improve the disparity map , i have tried to change the parameters but with little success.
  Any help would be appreciated, some sample codes or any link.</p>
  
  <p>Thank you</p>