Analysis of low activity in dynamic speckle patterns
Proceedings of SPIE, the International Society for Optical Engineering(2009)
摘要
In this work we present to methods to evaluate activity in low dynamic speckle patterns. The first one is based on the
behavior analysis of the vortices associated to the pattern. The other one consists in binarizing the speckle image. The
speckle grain areas, also called islands, experiment displacements and deformations. The variations of the island features
were analyzed with the aim of finding a correlation with the activity of the speckle pattern. Both methods were evaluated
in numerical simulations and controlled experiments. From the obtained results, it was possible to conclude that the
developed methods can be very useful for the analysis of low activity speckle patterns with some advantages with other
methods.
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关键词
speckle,speckle pattern,behavior analysis,numerical simulation
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