title: OpenCV get image rotation and tilt ,inclination
body: <p>Hi all anyone has any idea on how to get image rotation and tilt with respect to the vertical image in OpenCV
  for example here  <a href="http://i.stack.imgur.com/OvI3a.jpg" rel="nofollow">IMAGE</a></p>
  
  <p>how can a get alfa end tilt(inclination) with respect to the recognized image</p>
  
  <p>Thx</p>