title: working with Kinect skeleton 3D
body: <p>I work with the MS SDK in windows 7, and I'm  aiming to extract some head orientation from the 3D skeleton. But I was surprised when drawing the 3D coordinates. The estimated head position is always leaning forward. From my static position viewing the camera, I am putting 3 images as examples, both hands and heads are colored in yellow, the right side of skeleton is in magenta, and the left side in cyan. </p>
  
  <p><img src="https://i.stack.imgur.com/33MYS.png" alt="3D skeleton from the front view"></p>
  
  <p>(1) 3D skeleton from the front view</p>
  
  <p><img src="https://i.stack.imgur.com/DBTbp.png" alt="rotating the same skeleton from (1)"></p>
  
  <p>(2)rotating the same skeleton from (1)</p>
  
  <p><img src="https://i.stack.imgur.com/wKvlE.png" alt="top view of (1)"></p>
  
  <p>(3) top view of (1)</p>
  
  <p>So, The question is,</p>
  
  <ol>
  <li><p>Is the correct technique?</p></li>
  <li><p>Though I have changed the default parameters, I am not getting any improvements. Any tips on working setup skeleton filtering parameters?</p></li>
  </ol>