Instrumentation, Measurement, and Metrology

Method for calibrating cameras with large lens distortion

[+] Author Affiliations
De Xu

City University of Hong Kong, Department of Manufacturing Engineering and Engineering Management, Kowloon, Hong Kong and Chinese Academy of Sciences, Institute of Automation, The Key Laboratory of Complex System and Intelligence Science, Beijing 100080, China

You Fu Li

City University of Hong Kong, Department of Manufacturing Engineering and Engineering Management, Kowloon, Hong Kong

Min Tan

Chinese Academy of Sciences, Institute of Automation, The Key Laboratory of Complex System and Intelligence Science, Beijing 100080, China

Opt. Eng. 45(4), 043602 (April 03, 2006). doi:10.1117/1.2188393
History: Received April 12, 2005; Revised July 13, 2005; Accepted August 16, 2005; Published April 03, 2006
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A new calibration method is proposed for calibrating cameras with large lens distortion, using a planar grid pattern. The distortions are adjusted with an iterative algorithm. When the points on each curve in the image of the grid pattern are fitted with a linear equation in the image space, the distortion correction factors are determined. The camera's optical center is obtained through a Hough transform. Then, a group of linear equations and a cubic equation are established in the corrected image space. The remaining parameters of the camera are then deduced. Only one view of a planar grid pattern is needed for this method. The experimental results verify the effectiveness of the proposed method.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

De Xu ; You Fu Li and Min Tan
"Method for calibrating cameras with large lens distortion", Opt. Eng. 45(4), 043602 (April 03, 2006). ; http://dx.doi.org/10.1117/1.2188393


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