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Optical Engineering

Method for calibrating cameras with large lens distortion
Author(s): De Xu; Youfu Li; Min Tan
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Paper Abstract

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.

Paper Details

Date Published: 1 April 2006
PDF: 8 pages
Opt. Eng. 45(4) 043602 doi: 10.1117/1.2188393
Published in: Optical Engineering Volume 45, Issue 4
Show Author Affiliations
De Xu, Beijing Jiaotong Univ. (China)
Youfu Li, City Univ. of Hong Kong (Hong Kong China)
Min Tan, Institute of Automation (China)

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