4-point transform images

Question

I need to transform bitmap images with their 4 corner points moved from one location to another.

Any code that can run on Windows, C#/VB.NET preferably, even help ho

Answer 1

The keyword here is homography. Manolis Lourakis has written a GPL'ed homography implementation in C that is available here; however, this will not be able to be ported very easily because it relies on some external libraries such as LAPACK.