Abstract
This paper is devoted to a study of the role of the fluctuations that the eye is subject to,from the point of view of noise-enhanced processing. To this end, a basic model of theretina is considered, namely a regular sampler subject to space and time fluctuations thatmodel the random sampling and the involuntary eye tremor respectively. The filtering thatcan be done by the photoreceptor is also taken into account and the study focuseson a stochastic model of a natural scene. To quantify the effect of the noise, acoefficient of correlation between the signal acquired by a given photoreceptor anda given point of the scene that the eye is looking at is considered. It is shownboth for academic examples and for a more realistic case that the fluctuationswhich affect the retina can induce noise-enhanced processing effects. The observedeffect is then interpreted as a stochastic control of the retina via the randomtremor.
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