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Trans Tech Publications, Advanced Materials Research, (981), p. 348-351, 2014

DOI: 10.4028/www.scientific.net/amr.981.348

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Coded-Structured Light System Calibration Using Orthogonal Phase Shift Coding Combined with Zhang’s Method

Journal article published in 2014 by Xiao Yang Yu, Xiao Liang Meng, Hai Bin Wu, Xiao Ming Sun, Li Wang
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

In coded-structured light three dimensional system, system calibration plays a vital role for the measurement accuracy. The camera calibration method is very mature, but the study about projector calibration is less. Therefore, this paper proposes a projector calibration method with simple calibration process and high accuracy. This method combines the Zhang’?s plane model calibration method with orthogonal phase shift coding. In calibration process, this paper uses phase shift coding pattern to establish the relationship of projector image and camera corner point coordinates. According to the image coordinates in the projector’?s perspective, we program and calculate the projector’?s internal and external parameters matrix based on the Zhang’?s plane model calibration toolbox. The results show that the proposed method is simple and flexible, the maximum relative error of the calibration parameters is 0.03%, and it meets the requirements of system calibration in medical or industrial fields.