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Exact and approximate solutions of the perspective-three-point problem

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2 Author(s)
DeMenthon, D. ; Comput. Vision Lab., Maryland Univ., College Park, MD, USA ; Davis, L.S.

Model-based pose estimation techniques that match image and model triangles require large numbers of matching operations in real-world applications. The authors show that by using approximations to perspective, 2D lookup tables can be built for each of the triangles of the models. An approximation called `weak perspective' has been applied previously to this problem; the authors consider two other perspective approximations: paraperspective and orthoperspective. These approximations produce lower errors for off-center image features than weak perspective

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:14 ,  Issue: 11 )