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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 10 — Oct. 5, 2012

Alternative measures for biospeckle image analysis

André V. Saúde, Fortunato S. de Menezes, Patricia L. S. Freitas, Giovanni F. Rabelo, and Roberto A. Braga, Jr.  »View Author Affiliations


JOSA A, Vol. 29, Issue 8, pp. 1648-1658 (2012)
http://dx.doi.org/10.1364/JOSAA.29.001648


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Abstract

Biospeckle is a technique whose purpose is to observe and study the underlying activity of some material. It has its roots in optical physics, and its first step is an image acquisition process that produces a video sequence of the reflection of a laser. The video content can be analyzed to have an interpretation of the activity of the observed material. The literature on this subject presents several different measures for analyzing the video sequence. Three of the most popular measures are the generalized difference (GD), the weighted generalized difference (WGD), and Fujii’s method. These measures have drawbacks such as high computation time or limited visual quality of the results. In this paper, we propose (i) an alternative O(n) algorithm for the computation of the GD, (ii) an alternative measure based on the GD, (iii) an alternative measure based on the WGD, and (iv) a generalized definition of the Fujii’s method with better visual quality. We discuss the similarities between the new measures and the existent ones, showing when they are applicable. We prove the gain in time computation. The proposed measures will help researchers to gain time during their research and to be able to develop faster tools based on biospeckle application.

© 2012 Optical Society of America

OCIS Codes
(100.2960) Image processing : Image analysis
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(100.4995) Image processing : Pattern recognition, metrics
(240.6648) Optics at surfaces : Surface dynamics

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 3, 2012
Revised Manuscript: May 2, 2012
Manuscript Accepted: June 2, 2012
Published: July 24, 2012

Virtual Issues
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics

Citation
André V. Saúde, Fortunato S. de Menezes, Patricia L. S. Freitas, Giovanni F. Rabelo, and Roberto A. Braga, "Alternative measures for biospeckle image analysis," J. Opt. Soc. Am. A 29, 1648-1658 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-29-8-1648

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