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Optical Engineering

Evaluation of a scale-space filter for speckle noise reduction in electronic speckle pattern interferometry
Author(s): Pablo D. Ruiz; Guillermo H. Kaufmann
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Paper 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.

Paper Details

Date Published: 1 August 1998
PDF: 7 pages
Opt. Eng. 37(8) doi: 10.1117/1.601983
Published in: Optical Engineering Volume 37, Issue 8
Show Author Affiliations
Pablo D. Ruiz, Instituto de Fisica Rosario (Argentina)
Guillermo H. Kaufmann, Univ. Nacional de Rosario (Argentina)


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