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Proceedings Paper

A numerical model for dynamic speckle and its application to the analysis of temporally evolving processes
Author(s): Héctor Rabal; Marcelo Trivi; Ricardo Arizaga; Alejandro Federico; Gustavo E. Galizzi; Guillermo H. Kaufmann
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Paper Abstract

When the speckle pattern produced by a scattering surface shows some type of activity, the speckle distribution changes in time. This paper presents a method to locally estimate the spatial variance of the temporal variation of the phase as an activity descriptor in a sequence of dynamic speckle. This method is based on the computation of the spatial autocorrelation of the speckle intensity using a sliding window. The image obtained from the resulting spatial variance matrix reveals areas of the sample with different speckle activity. Results obtained for both simulated and experimental data are also shown.

Paper Details

Date Published: 15 September 2006
PDF: 6 pages
Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63411G (15 September 2006); doi: 10.1117/12.695369
Show Author Affiliations
Héctor Rabal, Univ. Nacional de la Plata (Argentina)
Marcelo Trivi, Univ. Nacional de la Plata (Argentina)
Ricardo Arizaga, Univ. Nacional de la Plata (Argentina)
Alejandro Federico, Instituto Nacional de Tecnología Industrial (Argentina)
Gustavo E. Galizzi, Instituto de Física Rosario (Argentina)
Guillermo H. Kaufmann, Instituto de Física Rosario (Argentina)

Published in SPIE Proceedings Vol. 6341:
Speckle06: Speckles, From Grains to Flowers
Pierre Slangen; Christine Cerruti, Editor(s)

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