Interferometry

Novel method to construct a quality map for phase unwrapping based on modulation and the phase gradient

[+] Author Affiliations
Yongjian Zhu

Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China

Zhu Luan, Qingguo Yang, Wei Lu, Liren Liu

Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China

Opt. Eng. 45(10), 105601 (October 24, 2006). doi:10.1117/1.2361175
History: Received September 19, 2005; Revised March 02, 2006; Accepted March 03, 2006; Published October 24, 2006
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A novel method to construct a quality map, called modulation–phase-gradient variance (MPGV), is proposed, based on modulation and the phase gradient. The MPGV map is successfully applied to two phase-unwrapping algorithms—the improved weighted least square and the quality-guided unwrapping algorithm. Both simulated and experimental data testify to the validity of our proposed quality map. Moreover, the unwrapped-phase results show that the new quality map can have higher reliability than the conventional phase-derivative variance quality map in helping to unwrap noisy, low-modulation, and/or discontinuous phase maps.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Yongjian Zhu ; Zhu Luan ; Qingguo Yang ; Wei Lu and Liren Liu
"Novel method to construct a quality map for phase unwrapping based on modulation and the phase gradient", Opt. Eng. 45(10), 105601 (October 24, 2006). ; http://dx.doi.org/10.1117/1.2361175


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