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Optical Engineering

Information Content Of Images Degraded By Speckle Noise
Author(s): Henri H. Arsenault; Gilbert V. April
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Paper Abstract

After a homomorphic transformation has been used to transform speckle noise into additive signal-independent noise, classic techniques are used to evaluate the number of discernible gray levels and the information capacity of images degraded by fully developed speckle noise. The probability distributions that we developed earlier are used to evaluate the required probabilities of error. Expressions are derived for square and for circular apertures. The information capacity is found to have a maximum of about 0.2 bits per speckle. The spatial frequency resolution required to obtain a given signal-to-noise ratio by spatial integration is evaluated.

Paper Details

Date Published: 1 May 1986
PDF: 5 pages
Opt. Eng. 25(5) 255662 doi: 10.1117/12.7973881
Published in: Optical Engineering Volume 25, Issue 5
Show Author Affiliations
Henri H. Arsenault, Universite Laval (Canada)
Gilbert V. April, Universite Laval (Canada)


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