I have a photograph showing two items, a and b, in a scene. I know the distance to a (if this helps). The camera is at a fixed location, and its height, focal length and direction angle are known. Assume the ground is completely flat.
All that is known about b are its x,y coordinates on the photograph.
I want to find the coordinates of item b and show this on a 2d map.
Camera View http://www.spannerworx.com/images/perspective.jpg
Side profile http://www.spannerworx.com/images/perspective2.jpg
What I want to achieve http://www.spannerworx.com/images/perspective3.jpg
Is this possible, if so please advise me on what calculations I need to achieve this?