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Optical Engineering

Eliminating sign ambiguity for phase extraction from a single interferogram
Author(s): Wenwen Zeng; Xiaopin Zhong; Jingzhen Li
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Paper Abstract

Eliminating the sign ambiguity is one of the important steps in phase extraction from a single interferogram. We propose a new method based on energy minimization to remove the sign ambiguity when retrieving a phase. Markov random field (MRF) is used to build up the pairwise relationship of a sign map. The method is thus a compromise between “global” and “local” methods. To alleviate the disturbance of noise, we employ additionally a neighborhood-direction-averaging and an adaptive filter instead of using optical flow. The gradient orientation is properly smoothed for MRF observation. Various techniques for minimizing MRF energy are compared and simulation results demonstrate the effectiveness of our method.

Paper Details

Date Published: 4 December 2013
PDF: 8 pages
Opt. Eng. 52(12) 124102 doi: 10.1117/1.OE.52.12.124102
Published in: Optical Engineering Volume 52, Issue 12
Show Author Affiliations
Wenwen Zeng, Shenzhen Univ. (China)
Xiaopin Zhong, Shenzhen Univ. (China)
Jingzhen Li, Shenzhen Univ. (China)

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