期刊
OPTICS AND LASER TECHNOLOGY
卷 48, 期 -, 页码 187-193出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2012.09.035
关键词
Structured light; Empirical model; Calibration
资金
- National Natural Science Foundation of China [51105218, 50975148]
- Research Fund for the Doctoral Program of Higher Education of China [20110002120053]
- Beijing Municipal Science & Technology Commission [Z121104002812045]
- Fund of State Key Laboratory of Tribology of China [SKLT11C6]
Structured light is commonly applied to various 3D surface profile measurements because of its nature of low cost and high speed. The existing structured light-based reconstruction model and calibration can be classified as analytical and empirical methods, among which the empirical methods are often used since it is pixel-wise method. However, the existing empirical matching difference-height models are oversimplified and the empirical calibration methods are cumbersome and time-consuming. Therefore, two contributions of this paper are: first, we derive a general matching difference-height model with high consistence and resolution, the proposed model is independent of hardware configuration; second, a multi-sphere calibration strategy is proposed to simplify and accelerate the calibration procedure by a flat board with four balls. Some experiments are carried out to evaluate the proposed methods. The experimental results demonstrate that matching difference-height model improves the resolution and consistency by 3% and 13% in comparison with the traditional models; while, the proposed calibration duration is reduced to 27% of the conventional plane-translation calibration method. (C) 2012 Elsevier Ltd. All rights reserved.
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