Fringe contrast-based 3D profilometry using fringe projection

被引:11
|
作者
Chen, LJ [1 ]
Quan, CG [1 ]
Tay, CJ [1 ]
Huang, YH [1 ]
机构
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 119260, Singapore
来源
OPTIK | 2005年 / 116卷 / 03期
关键词
fringe contrast; quality-guided phase unwrapping; phase-shifting; shape measurement; fringe projection;
D O I
10.1016/j.ijleo.2004.12.013
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Quality-guided algorithm is a widely used method in phase unwrapping.. This paper shows an accurate quality map based on fringe contrast for 3D shape measurement. Phase-shifted fringe patterns are projected onto an object surface by a programmable liquid crystal projector and recorded by a CCD camera. A wrapped phase map and a fringe contrast map are extracted from the deformed fringe patterns by the phase-shifting technique. Guided by the contrast map, the quality-guided unwrapping algorithm minimizes unwanted shadow and non-uniform surface reflectance effects and is able to retrieve a correct surface profile. Validity of the proposed method is tested on a fish model and a cutting tool specimen. (c) 2005 Elsevier GmbH. All rights reserved.
引用
收藏
页码:123 / 128
页数:6
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