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Proceedings Paper

A fast phase unwrapping method based on region-division
Author(s): Wenxiang Nie; Chenxing Wang; Feipeng Da; Changjin Jiang; Haixia Wang
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Paper Abstract

Phase unwrapping is a vital part of optical measurement technology. The path-following method based on quality map, the mainstream technology in single fringe-pattern phase unwrapping, can suppress the error propagation of phase unwrapping effectively. However, the time consumption of this technology will increase significantly along with the increasing of pixels in a fringe pattern. For this reason, a phase unwrapping method based on region division was proposed, through bidimensional sinusoids-assisted empirical mode decomposition (BSEMD). In this method, the problematic regions where the phase unwrapping error is easy to occur such as object edge and local shadow will be divided. In these problematic regions, the quality-guided phase unwrapping method will be applied, where the instantaneous frequencies acquired in the process of extracting wrapped phase are taken as quality map. Then flood fill algorithm will be applied in the rest regions directly. Through simulation and experiment, the proposed method greatly improves the processing speed while ensuring the accuracy.

Paper Details

Date Published: 24 July 2018
PDF: 6 pages
Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 108270V (24 July 2018); doi: 10.1117/12.2327041
Show Author Affiliations
Wenxiang Nie, Southeast Univ. (China)
Chenxing Wang, Southeast Univ. (China)
Feipeng Da, Southeast Univ. (China)
Changjin Jiang, Southeast Univ. (China)
Haixia Wang, Zhejiang Univ. of Technology (China)

Published in SPIE Proceedings Vol. 10827:
Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018)
Yingjie Yu; Chao Zuo; Kemao Qian, Editor(s)

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