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Evaluation of a scale-space filter for speckle noise reduction in electronic speckle pattern interferometry

[+] Author Affiliations
Pablo D. Ruiz

Instituto de Fi´sica Rosario (CONICET-UNR), Rosario?2000, Argentina

Guillermo H. Kaufmann

Instituto de Fi´sica Rosario (CONICET-UNR), and Universidad Nacional de Rosario, Departamento de Fi´sica, Facultad de Ciencias Exactas, Ingenieri´a y Agrimensura, Rosario 2000, Argentina

Opt. Eng. 37(8), 2395-2401 (Aug 01, 1998). doi:10.1117/1.601983
History: Received Sep. 8, 1997; Revised Feb. 27, 1998; Accepted Feb. 28, 1998
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Abstract

Recently, the application of a scale-space filter for speckle noise reduction in electronic speckle pattern interferometry correlation fringes was reported. The filter, derived from information theory and statistical mechanics considerations, is an iterative, adaptive, and clustering algorithm that performs edge-preserving smoothing. To apply the filter, the kernel size and the number of iterations must be previously set. We show that both parameters can be chosen depending on image features, e.g., presence or absence of sharp edges due to shadows, holes, or physical limits of the test object. When high-contrast edges are present, it is also shown that better noise reduction and edge preservation are obtained when the convergence of the solution of the filter is truncated. Both computer-simulated and experimental correlation fringes are used to test the scale-space filter. © 1998 Society of Photo-Optical Instrumentation Engineers.

© 1998 Society of Photo-Optical Instrumentation Engineers

Citation

Pablo D. Ruiz and Guillermo H. Kaufmann
"Evaluation of a scale-space filter for speckle noise reduction in electronic speckle pattern interferometry", Opt. Eng. 37(8), 2395-2401 (Aug 01, 1998). ; http://dx.doi.org/10.1117/1.601983


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