Phase unwrapping error reduction framework for a multiple-wavelength phase-shifting algorithm

Song Zhang

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Phase unwrapping error reduction framework for a multiple-wavelength phase-shifting algorithm

机译：Phase unwrapping error reduction framework for a multiple-wavelength phase-shifting algorithm

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摘要

We address a framework to reduce the unwrapping errors of the measurement system using a digital multiple-wavelength phase-shifting algorithm. In particular, the following framework is proposed: (1) smooth the raw phase by smoothing the sine and cosine images of the phase computation of the inverse tangent function; (2) locate and remove the incorrectly unwrapped points by the monotonicity condition of the phase map; (3) obtain the unwrapped phase map for the shortest wavelength without smoothing; (4) detect holes and fill them to preserve as much useful information as possible. Experiments demonstrated that the proposed framework significantly alleviated the measurement errors caused by the phase noise.

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来源
《Optical Engineering》 |2009年第10期|105601-1-105601-8|共8页
作者
Song Zhang;
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作者单位

Iowa State University, Department of Mechanical Engineering, Virtual Reality Applications Center, Human Computer Interaction, Ames, Iowa 50011;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
关键词
structured light; phase shifting; phase unwrapping; multiple wavelength; phase error;

Phase unwrapping error reduction framework for a multiple-wavelength phase-shifting algorithm

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