Temporal difference method for processing dynamic speckle patterns |
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| Authors: | L. Martí -Ló pez,H. Cabrera,R. Gonzá lez-Peñ a |
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| Affiliation: | a Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear, Calle 30, no. 502, Miramar, Ciudad de La Habana, Cubab Centro de Estudios Interdisciplinarios de la Física, Instituto Venezolano de Investigaciones Científicas, Mérida 5101, Venezuelac DICIS, Universidad de Guanajuato, Salamanca, C.P. 36885, Gto., Méxicod Dpto. de Fisiología, Universidad de Valencia, Unidad de Biofísica y Física Médica, Avda. Blasco Ibáñez 15, CP 46010, Valencia, Spain |
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| Abstract: | ![]()
A temporal difference method for processing dynamic speckle images is proposed. In the method two speckle images of an object, separated by a time interval, are subtracted one from the other to detect whether the speckle structure has changed or not. The rationale of the method is discussed. A variant of the method that allows measuring the area of an activity zone surrounded by a static region is tested in digital simulations. As a demonstrative experiment, that variant is employed to characterize the drying of a damp patch in filter paper. |
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| Keywords: | Dynamic speckle Image processing |
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