Abstract

We present a method of analysis of images of dynamic speckle based on the filtering in frequency bands of the temporary history of each pixel. Butterworth filters are applied to the temporary evolution, and different images are constructed showing the energy in each frequency band. Different degrees of activity of the sample in study, presumably attributed to different origins, are found. The method is exemplified with images of bruising damage in fruits and of biological activity in germinating corn seeds. It is found that the activity in the bruised region of an apple differs from the activity of healthy regions in a certain characteristic frequency range. The activity of the embryo can also be distinguished from that of the endosperm in corn seeds during germination.

© 2005 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Decomposition of biospeckle signals through granulometric size distribution

Eduardo Blotta, Virginia Ballarin, and Hector Rabal
Opt. Lett. 34(8) 1201-1203 (2009)

Alternative measures for biospeckle image analysis

André V. Saúde, Fortunato S. de Menezes, Patricia L. S. Freitas, Giovanni F. Rabelo, and Roberto A. Braga
J. Opt. Soc. Am. A 29(8) 1648-1658 (2012)

Speckle activity images based on the spatial variance of the phase

Héctor Rabal, Nelly Cap, Marcelo Trivi, Ricardo Arizaga, Alejandro Federico, Gustavo E. Galizzi, and Guillermo H. Kaufmann
Appl. Opt. 45(34) 8733-8738 (2006)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription