title: Finger detection in human hand
body: <p><strong>What i am trying to do:</strong></p>
  
  <p>I am trying to extract the fingers.
  I want my code to perform something similar like <a href="http://www.youtube.com/watch?v=mGpTE1RkEvQ" rel="nofollow">this</a>.
  However, aim is to extract the knuckle.</p>
  
  <p><strong>Environment:</strong></p>
  
  <p>The person sitting in a typical webcam pc/laptop environment. </p>
  
  <p><strong>What have i analysed:</strong></p>
  
  <p>I've read read and understood that 
  1. I have to find the contours
  2. Need to find convex null and convexityDefects
  3. Have to draw contours 
  Am i wrong with my understanding?</p>
  
  <p>I have just tried with the code(<a href="http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/hull/hull.html" rel="nofollow">http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/hull/hull.html</a>), but not getting the desired result.</p>
  
  <p><strong>Question:</strong>
  How to extract the fingers in computer vision using opencv?</p>
  
  <p>Ofcourse, i am new to Image Processing.</p>