New phase-unwrapping method and its application in shape measurement

Xiaoyuan He; Xin Kang

doi:10.1117/12.468869

29 May 2002 New phase unwrapping method and its application in shape measurement

Xiaoyuan He, Xin Kang

Proceedings Volume 4537, Third International Conference on Experimental Mechanics; (2002) https://doi.org/10.1117/12.468869
Event: Third International Conference on Experimental Mechanics, 2002, Beijing, China

Abstract

A new phase unwrapping algorithm is proposed in this paper. This algorithm, based on the global continuity of the physical information being measured, is shown to be reliable by experimental results. Unlike the brunch-cut method, this new algorithm needs not placing brunch cuts but ratifying the errors in the initial unwrapped phase map obtained by the conventional method using the least difference of phase-cross-section. It is suitable for unwrapping phase map in the presence of errors such as noise, phase discontinuity more than (pi) and insufficient sampling. In addition, the new method is simple and requires little computing time.

Citation Download Citation

Xiaoyuan He and Xin Kang "New phase unwrapping method and its application in shape measurement", Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); https://doi.org/10.1117/12.468869

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KEYWORDS

Phase measurement

3D modeling

Fringe analysis

Phase shift keying

Algorithm development

Phase shifts

Teeth

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