Flexible method for structured light system calibration

被引:49
作者
Gao, Wei [1 ]
Wang, Liang [1 ]
Hu, Zhanyi [1 ]
机构
[1] Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China
基金
中国国家自然科学基金;
关键词
projector calibration; camera calibration; structured light system; 3-D shape measurement;
D O I
10.1117/1.2969118
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a flexible technique to easily calibrate a structured light system, in which only two patterns are required: a paper checkerboard printed on a laser printer and attached to a surface plane, and a pattern image of a checkerboard, which is projected on the surface plane by a LCD projector. We treat the projector as a second camera; then the problem of calibrating the structure light system becomes equivalent to calibrating a stereovision system. The key to our technique is to make the projector able to see the calibration checkerboard like a camera. For that purpose, two approaches are proposed, called the black-and-white checkerboard method and the red-and-blue checkerboard method. Both computer simulation and real data are used to test the proposed technique, and very good results are obtained. (C) 2008 Society of Photo-Optical Instrumentation Engineers.
引用
收藏
页数:10
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