Eliminating sign ambiguity for phase extraction from a single interferogram

Wenwen Zeng; Xiaopin Zhong; Jingzhen Li

doi:10.1117/1.OE.52.12.124102

4 December 2013 Eliminating sign ambiguity for phase extraction from a single interferogram

Wenwen Zeng, Xiaopin Zhong, Jingzhen Li

Author Affiliations +

Optical Engineering, Vol. 52, Issue 12, 124102 (December 2013). https://doi.org/10.1117/1.OE.52.12.124102

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.

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Wenwen Zeng, Xiaopin Zhong, and Jingzhen Li "Eliminating sign ambiguity for phase extraction from a single interferogram," Optical Engineering 52(12), 124102 (4 December 2013). https://doi.org/10.1117/1.OE.52.12.124102

Published: 4 December 2013

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