21 June 2007 Fluctuation in the retina: noise-enhanced processing via random sampling and microsaccades?
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Proceedings Volume 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems; 66020V (2007) https://doi.org/10.1117/12.724607
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy
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.
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Steeve Zozor, Steeve Zozor, Pierre-Olivier Amblard, Pierre-Olivier Amblard, Cedric Duchêne, Cedric Duchêne, } "Fluctuation in the retina: noise-enhanced processing via random sampling and microsaccades?", Proc. SPIE 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems, 66020V (21 June 2007); doi: 10.1117/12.724607; https://doi.org/10.1117/12.724607
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