title: How to create a Bird-Eye-View of image to a given plane?
body: <p>I'm given a plane (support vector and plane's normal vector), an image which was taken by a camera of which i know the intrinsic parameters (fx,fy,cx,cy). How do i obtain the transformation of this image to a bird-eye-view like image (so that birds view is collinear to the plane's normal vector). I'm confused with the coordinate systems i have to use, some matrices are in world coordinates and some in local. I know that there is <code>warpPerspective()</code> in OpenCV, would this do the job? </p>
  
  <p>Im using OpenCV: 2.4.9</p>
  
  <p>Thanks alot! </p>
  
  <p><strong>Update:</strong>
  Do I have to calculate 4 points with the camera facing normal, then 4 points from the bird eye view and pass them to <code>findHomography()</code> to obtain the transformation matrix?</p>
  
  <p><strong>Update:</strong>
  Solved. Got it to work!</p>