中央研究院 資訊科學研究所

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Camera calibration is a crucial prerequisite in many applications of computer vision. In this talk, a new geometry-based camera calibration technique will be presented, which resolves two main issues associated with the widely used Zhang's method: (i) the lack of guidelines to avoid outliers in the computation and (ii) the assumption of fixed camera focal length. The proposed approach is based on the closed-form solution of principal lines with their intersection being the principal point, while each principal line can concisely represent relative orientation/position (up to one degree of freedom for both) between a special pair of coordinate systems of image plane and a calibration pattern. With such analytically tractable image features, computations associated with the calibration are greatly simplified, while the guidelines in (i) can be established intuitively. Experimental results for synthetic and real data show that the proposed approach does compare favorably with Zhang's method, in terms of correctness, robustness, and flexibility, and addresses issues (i) and (ii) satisfactorily.

Jen-Hui Chuang received the BS degree in electrical engineering from National Taiwan University in 1980, the MS and Ph.D. degrees, both in electrical and computer engineering, from University of California at Santa Barbara and Urbana-Champaign University of Illinois at Urbana-Champaign in 1883 and 1991, respectively. Since then he has been on the faculty of the Department of Computer Science of National Chiao Tung University (NCTU). From 2004 to 2005, he was the Chairman of the Department of Computer and Information Science of NCTU. From 2017 to 2020 he was the Dean of the College of Computer Science of NCTU. Currently, he serves as Vice President for Academic Affairs of National Yang Ming Chiao Tung University. Dr. Chuang’s research interests include signal and image processing, computer vision and pattern recognition, and robotics. He served as an associate editor of Signal Processing from 2005 to 2010 and has been an associate editor of Journal of Information and Science and Engineering since 2009. Dr. Chuang was the President of Chinese Image Processing and Pattern Recognition Society from 2015 to 2016 and served as the governing board member of International Association of Pattern Recognition from 2013 to 2016, and served as thegoverning board member of IEEE Taipei Chapterfrom 2017 to 2020. Dr. Chuang is a senior member of IEEE.

(List of publications: 【dblp: Jen-Hui Chuang】 )