28 June 2016 Two-dimensional discrete wavelets transform for optical phase extraction: application on speckle correlation fringes
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Optical Engineering, 55(12), 121708 (2016). doi:10.1117/1.OE.55.12.121708
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.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Abdulatef Ghlaifan, Yassine Tounsi, Sara Zada, Desire Muhire, Abdelkrim Nassim, "Two-dimensional discrete wavelets transform for optical phase extraction: application on speckle correlation fringes," Optical Engineering 55(12), 121708 (28 June 2016). https://doi.org/10.1117/1.OE.55.12.121708
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