Augmented reality rotation & zoom

[tyrskyzz]

I'm working on augmented reality engine and I have a following problem.
I'm tracking a 2D rectangle tracking picture inside an other picture (webcam stream).
I have detected all four 2D corner coordinates for that tracking picture.

Now I need to calculate from the corner coordiantes how the original tracker picture has rotated (x-,y-,z-rotations) and zoomed.
Bare in mind that the coordinates doesn't create right angle quadrilateral.
Any ideas how I can do it?
Thanks for any advice.

 

[Stephen Tashi]

You haven't given enough information to define a specific problem. Perhaps people who write virtual reality programs all know what you are talking about, but I don't. On one hand you say you are tracking a 2D "rectangle" and on the other hand you say that the coordinates don't define a right angle quadrilateral. So is this some sort of projection problem? Are we looking at the image of a 2D rectangle in space projected onto a plane?