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http://dx.doi.org/10.5302/J.ICROS.2007.13.3.224

A Camera Calibration Method using Several Images for Three Dimensional Measurement  

Kang, Dong-Joong (부산대학교 기계공학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.13, no.3, 2007 , pp. 224-229 More about this Journal
Abstract
This paper presents a camera calibration method using several images for three dimensional measurement applications such as stereo systems, mobile robots, and visual inspection systems in factories. Conventional calibration methods that use single image suffer from errors related to reference point extraction in image, lens distortion, and numerical analysis of nonlinear optimization. The camera parameter values obtained from images of same camera is not same even though we use same calibration method. The camera parameters that are obtained from several images of different view for a calibration target is usaully not same with large error values and we can not assume a special probabilistic distribution when we estimate the parameter values. In this paper, the median value of camera parameters from several images is used to improve estimation of the camera values in an iterative step with nonlinear optimization. The proposed method is proved by experiments using real images.
Keywords
multiple images; iterative median method; camera calibration; stereo system; robot vision;
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