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Phase unwrapping for noisy phase maps using rotational compensator with virtual singular points

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Title: Phase unwrapping for noisy phase maps using rotational compensator with virtual singular points
Authors: Tomioka, Satoshi Browse this author
Heshmat, Samia Browse this author
Miyamoto, Naoki Browse this author
Nishiyama, Shusuke Browse this author
Keywords: Noise in imaging systems
Holographic interferometry
Interferometric imaging
Phase unwrapping
Phase measurement
Coherence and statistical optics
Instrumentation, measurement, and metrology
Image processing
Imaging systems
Issue Date: 2010
Publisher: Optical Society of America
Journal Title: Applied Optics
Volume: 49
Issue: 25
Start Page: 4735
End Page: 4745
Publisher DOI: 10.1364/AO.49.004735
PMID: 20820215
Abstract: In the process of phase unwrapping for an image obtained by an interferometer or in-line holography, noisy image data may pose difficulties. Traditional phase unwrapping algorithms used to estimate a two-dimensional phase distribution include much estimation error, due to the effect of singular points. This paper introduces an accurate phase-unwrapping algorithm based on three techniques: a rotational compensator, unconstrained singular point positioning, and virtual singular points. The new algorithm can confine the effect of singularities to the local region around each singular point. The phase-unwrapped result demonstrates that accuracy is improved, compared with past methods based on the least-squares approach.
Rights: © 2010 Optical Society of America, Inc.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 富岡 智

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