The Camera Itself as a Calibration Pattern: A Novel Self-Calibration Method for Non-Central Catadioptric Cameras

Sensors

Zhiyu Xiang¹  Bo Sun² 

[1] Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, Hangzhou 310027, China;Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, Hangzhou 310027, China; E-Mails:

关键词: non-central catadioptric camera;    self-calibration;    mirror posture;    mirror boundary;    lens boundary;   

DOI  :  10.3390/s120607299

来源: mdpi

【 摘 要 】

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 more than a single image acquired from the catadioptric camera is needed. Experimental results both on synthesized and real images prove our success.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.