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PubMed · 17164840

Blind phase shift estimation in phase-shifting interferometry.

Hongwei Guo·Yingjie Yu·Mingyi Chen
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Abstract

A blind phase shift estimation algorithm that allows simultaneous calculation of phases and phase shifts from three or more interferograms is presented. In phase-shifting interferometry, the phase shift errors introduce specific correlations between the calculated background intensity distribution and the fringe component. These correlations can be measured with a cross-power spectrum. By minimization of an objective function based on this cross-power spectrum, the actual phase shifts are estimated and used for phase recovery. The validity of this algorithm is verified by both the numerical simulation and the experiment results.

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AlgorithmsImage EnhancementImage Interpretation, Computer-AssistedInterferometryMicroscopy, Phase-ContrastReproducibility of ResultsSensitivity and SpecificityEvaluation StudyJournal ArticleValidation Study

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Hongwei Guo, Yingjie Yu, Mingyi Chen. 2007. Blind phase shift estimation in phase-shifting interferometry.. https://doi.org/10.1364/josaa.24.000025

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