Island analysis of low-activity dynamic speckles

被引：2

作者：

Guzman, Marcelo N. ^{[1
,2
,3
]}

Sendra, G. Hernan ^{[4
]}

Rabal, Hector J. ^{[2
,3
]}

Trivi, Marcelo ^{[2
,3
]}

机构：

[1] Univ Nacl Mar Del Plata, Fac Ingn, Lab Laser, Mar Del Plata, Buenos Aires, Argentina

[2] Univ Nacl La Plata, Fac Ingn, Ctr Invest Opt, CONICET La Plata,CIC, Plata, Argentina

[3] Univ Nacl La Plata, Fac Ingn, UID Optimo, Plata, Argentina

[4] Univ Heidelberg ZMBH, Zentrum Mol Biol, Imaging Facil, D-69120 Heidelberg, Germany

来源：

APPLIED OPTICS | 2014年 / 53卷 / 01期

关键词：

OPTICAL VORTEX METROLOGY;

D O I：

10.1364/AO.53.000014

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work we present a method to evaluate activity in low dynamic speckle patterns. It consists of binarizing the speckle image and analyzing the displacements and deformations of the resulting speckle grain regions, here called islands. Numerical simulations and controlled experiments were used to study the variations of the island features with the aim of finding a correlation with the activity of the speckle pattern. From the obtained results it was possible to conclude that the developed method can be useful for the analysis of low activity speckle patterns with the advantage of requiring only pairs of frames, thus permitting the assessment of nonstationary processes. In the case of stationary phenomena, so that stacks of frames registers are representative of them, dilute activity images can also be constructed. (C) 2013 Optical Society of America

引用

页码：14 / 21

页数：8

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