Radial Distortion Refinement by Inverse Mapping-Based Extrapolation

Authors:
Ho Gi Jung;Yun Hee Lee;Pal Joo Yoon;Jaihie Kim
Affiliations:
MANDO Corporation, Korea;MANDO Corporation, Korea;MANDO Corporation, Korea;Yonsei University, Korea
Venue:
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 01
Year:
2006

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Abstract

"Caltech Calibration Toolbox" by Jean-Yves Bouguet is one of the most famous open-source calibration tools [1]. Although it works well for general camera lenses, it reveals problems in case of wide-angle lens. This paper analyzes the problem and shows that the insufficient calibration of radial distortion is caused by lease-square based polynomial fitting. To overcome the problem, this paper proposes novel refinement method using inverse mapping-based extrapolation. The proposed method is expected to be an efficient supplement and is opened to the public in the appendix as a short Matlab script.