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Central Catadioptric Camera Calibration using Planar Objects

Chen, Cheng-I ; Chen, Yong-Sheng

The 5th International Conference on Computer Vision Systems, 2007
Bielefeld, 21. - 24. März 2007

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Central catadioptric cameras combine lenses with mirrors to enlarge the field of view while keeping a single effective viewpoint. In this paper we propose a novel method of calibrating the intrinsic parameters of central catadioptric cameras using a planar object. Based on the viewing sphere model, we can warp a portion of the catadioptric image to an image captured by a virtual perspective camera with given intrinsic and extrinsic parameters. We show that placing the planar object several times around the catadioptric camera is equivalent to placing the same object at different poses relative to a static virtual perspective camera. Therefore, homography method can be applied to calculate the relative poses of the planar object as well as the projection error of feature points on the planar object. By minimizing the projection error, we can obtain the optimized intrinsic parameters of the central catadioptric camera. Besides simplicity, experiments with simulation and real image data clearly demonstrate the high robustness and accuracy of the proposed calibration method.

Keywords: Catadioptric Camera, Camera Calibration
Institution: Faculty of Technology, Research Groups in Informatics
DDC classification: Data processing, computer science, computer systems

Suggested Citation:
Chen, Cheng-I ; Chen, Yong-Sheng  (2007)  Central Catadioptric Camera Calibration using Planar Objects. The 5th International Conference on Computer Vision Systems, 2007

URL: http://biecoll.ub.uni-bielefeld.de/volltexte/2007/40

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