Calibration Errors in Augmented Reality: A Practical Study
ISMAR '05 Proceedings of the 4th IEEE/ACM International Symposium on Mixed and Augmented Reality
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Calibrating sequences were a camera moves without zooming is often considered as a pure viewpoint estimation problem. Here, we demonstrate that considering varying principal point while keeping the focal length constant allows us to obtain a reprojection error similar to the one obtained with full calibration while imposing existing constraints on the camera (no zooming). Then, we propose a robust calibration process which can be used for any scene that contains planar structures. Robustness is obtained by estimating independently the principal point position and the viewpoint.