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Optical Engineering

Two-dimensional discrete wavelets transform for optical phase extraction: application on speckle correlation fringes
Author(s): Abdulatef Ghlaifan; Yassine Tounsi; Sara Zada; Desire Muhire; Abdelkrim Nassim
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Paper Abstract

A method for optical phase extraction based on two-dimensional discrete wavelets transform (2-DWT) decomposition is shown. From modulated fringe pattern, phase distribution is extracted by the ratio between detail and approximation. Modulation process is realized digitally by introducing high-frequency spatial carrier, and this process needs two π/2-shifted fringe patterns. We propose to use only single fringe and generate its quadrature by spiral phase transform (SPT). After validation by computer simulation, we apply the 2-DWT algorithm on experimental speckle fringe correlation taken for hard disk surface. The extracted phase using SPT quadrature was compared with that given using this time experimental quadrature, and we show a good performance by multiscale structural similarity metric.

Paper Details

Date Published: 28 June 2016
PDF: 6 pages
Opt. Eng. 55(12) 121708 doi: 10.1117/1.OE.55.12.121708
Published in: Optical Engineering Volume 55, Issue 12
Show Author Affiliations
Abdulatef Ghlaifan, Univ. Chouaïb Doukkali (Morocco)
Yassine Tounsi, Univ. Chouaïb Doukkali (Morocco)
Sara Zada, Univ. Chouaïb Doukkali (Morocco)
Desire Muhire, Univ. Chouaïb Doukkali (Morocco)
Abdelkrim Nassim, Univ. Chouaïb Doukkali (Morocco)

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