On improving the accuracy of structured light systems

Peisen S. Huang; Xu Han

doi:10.1117/12.692631

6 November 2006 On improving the accuracy of structured light systems

Peisen S. Huang, Xu Han

Proceedings Volume 6382, Two- and Three-Dimensional Methods for Inspection and Metrology IV; 63820H (2006) https://doi.org/10.1117/12.692631
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

We propose a nonlinear calibration method for improving the accuracy of structured light systems that use cameras and projectors. Previously we have developed a systematic method for the calibration of projectors as well as structured light systems for 3-D shape measurement. However, we used only a linear model and did not consider lens distortions of the camera and the projector. As a result, measurement accuracy was limited. In this paper, we develop nonlinear models for both the camera and the projector and apply them to develop a nonlinear algorithm for 3-D shape measurement. The aim is to improve system accuracy by reducing the nonlinear error caused by lens distortion. Experimental results on nonlinear camera and projector calibration, comparison of 3-D measurement errors with linear and nonlinear camera and projector models, as well as 3-D shape measurement of some sample objects are presented.

Citation Download Citation

Peisen S. Huang and Xu Han "On improving the accuracy of structured light systems", Proc. SPIE 6382, Two- and Three-Dimensional Methods for Inspection and Metrology IV, 63820H (6 November 2006); https://doi.org/10.1117/12.692631

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