title: Finding perspective transformation between two planes
body: <p>I have a point cloud created from multiple images. I extracted a plane from it, it is also in 3d co-ordinate system, this implies I have the plane equation of that plane. But in none of the original images the plane has ortho-normal view, that is the plane is not parallel to the viewing plane. But, as I have the plane's 3d cloud, I want to project it in XY plane, that is I want to make the plane parallel to the viewing plane and create an image from it. What is the algorithm or function to do it in C++/OpenCV?</p>