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Proceedings Paper

Fluctuation in the retina: noise-enhanced processing via random sampling and microsaccades?
Author(s): Steeve Zozor; Pierre-Olivier Amblard; Cedric Duchêne
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Paper Abstract

The goal of this work is to study the fluctuations the eye is subjected to, from the point of view of noise-enhanced processing. In this paper we consider a basic model of retina: a regular sampler subjected to space and time fluctuations to model the random sampling and the eye-tremor respectively. We also take into account the filtering made by the photoreceptors and we focus on a stochastic model of natural scene. To quantify the effect of the noise, we study the correlation coefficient between the signal acquired by a given photoreceptor, and a given point of the scene the eye is looking at. We then show on academic examples as well as on a more realistic case that the fluctuations which affect the retina can induce noise-enhanced processing effects. Finally, we interpret why this effect is possible. We especially interpret the microsaccadic movement of the retina as a stochastic control.

Paper Details

Date Published: 21 June 2007
PDF: 10 pages
Proc. SPIE 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems, 66020V (21 June 2007); doi: 10.1117/12.724607
Show Author Affiliations
Steeve Zozor, GIPSA-Lab., CNRS (France)
Pierre-Olivier Amblard, GIPSA-Lab., CNRS (France)
Cedric Duchêne, GIPSA-Lab., CNRS (France)

Published in SPIE Proceedings Vol. 6602:
Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems
Sergey M. Bezrukov, Editor(s)

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