A new linear algorithm for calibrating central catadioptric cameras |
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Authors: | Fuchao Wu Fuqing Duan Zhanyi Hu Yihong Wu |
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Affiliation: | 1. College of Information Science and Technology, Beijing Normal University, Beijing 100875, China;2. Peking University Cancer Hospital and Institute, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Beijing, 100142, China;3. Department of Obstetrics and Gynecology, Navy General Hospital, Beijing 100048, China |
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Abstract: | In this paper, a novel linear calibration algorithm based on lines is presented for central catadioptric cameras. We firstly derive the relationship between the projection on the viewing sphere of a space point and its catadioptric image. And then by the relationship we establish a group of linear constraints on the catadioptric parameters from the catadioptric projections of spatial lines. By using these linear constraints, any central catadioptric camera can be fully calibrated from a single view of three or more lines without prior knowledge on the camera. Extensive experiments show this algorithm can improve the calibration's robustness. |
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