the camera itself as a calibration pattern a novel self-calibration method for non-central catadioptric cameras相机本身作为一个校准模式新颖的自校准方法偏心的反射折射的相机.pdf

Sensors 2012, 12, 7299-7317; doi:10.3390/s120607299 OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article The Camera Itself as a Calibration Pattern: A Novel Self-Calibration Method for Non-Central Catadioptric Cameras Zhiyu Xiang 1,2,*, Bo Sun 2 and Xing Dai 2 1 Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, Hangzhou 310027, China 2 Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, Hangzhou 310027, China; E-Mails: sunbo51@ (B.S.); dexctor@ (X.D.) * Author to whom correspondence should be addressed; E-Mail: xiangzy@; Tel./Fax: +86-571-8795-1529. Received: 30 April 2012; in revised form: 14 May 2012 / Accepted: 14 May 2012 / Published: 30 May 2012 Abstract: A novel and practical self-calibration method for misaligned non-central catadioptric cameras is proposed in this paper. Without the aid of any special calibration patterns in the scene, the developed method is able to automatically estimate the pose parameters of the mirror with respect to the perspective camera. First it uses the ellipse corresponding to the mirror boundary in the image to compute the possible solutions for mirror postures. With two pose candidates, thereafter we propose a novel selection method to find the correct solution by using the image of the lens boundary. The whole calibration process is automatic and convenient to carry out since nothing mo