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Augmented Reality scenario: I have a piece of paper on the table and a camera pointed at it, the piece of paper appear to be slanted with two pair of edges going towards two vanishing points.

Say I draw a dot on that paper, how would I calculate its coordinate on the paper-plane, just by knowing the on-screen coords of the four vertices of the paper, as well as the on-screen coords of the dot?

Any point in the right direction will be greatly appreciated :D I don't even know what this process is called.

Thanks! ~Xrave

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    You may be interested in this thread: http://math.stackexchange.com/questions/96662/augmented-reality-transformation-matrix-optimization2012-01-05

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