title: Calculating scale, rotation and translation from Homography matrix
body: <p>I am trying to calculate scale, rotation and translation between two consecutive frames of a video. So basically I matched keypoints and then used opencv function <code>findHomography()</code> to calculate the homography matrix.<br>
  <code>homography = findHomography(feature1 , feature2 , CV_RANSAC); //feature1 and feature2 are matched keypoints</code></p>
  
  <p>My question is: How can I use this matrix to calculate scale, rotation and translation?.<br>
  Can anyone provide me the code or explanation as to how to do it?</p>