Journal ArticleDOI
A simple model of human foveal ganglion cell responses to hyperacuity stimuli
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TLDR
A physiologically plausible model of the first steps of spatial visual information processing in the fovea of the human retina could support the hypothesis that, for moderate contrasts (≤ 40%), hyperacuity is mediated by the magnocellular (MC-) pathway.Abstract:
We developed a physiologically plausible model of the first steps of spatial visual information processing in the fovea of the human retina. With the predictions of this model we could support the hypothesis that, for moderate contrasts (≤ 40%), hyperacuity is mediated by the magnocellular (MC-) pathway. Despite the lower sampling density in the MC pathway, as compared to the parvocellular (PC-) pathway, the information that is transferred by the MC ganglion cells is sufficient to achieve thresholds comparable to those of human subjects in psychophysical tasks. This is a result of the much higher signal-to-noise ratio of the MC pathway cell signals. The PC pathway cells do not transfer enough information for hyperacuity thresholds.read more
Citations
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Seeing via Miniature Eye Movements: A Dynamic Hypothesis for Vision.
Ehud Ahissar,Amos Arieli +1 more
TL;DR: This work argues that the only way the visual system can achieve its high resolution given its fixational movements is by seeing via these movements, and proposes a hypothesis for vision, in which coarse details are spatially encoded in gaze-related coordinates, and fine spatial details are temporally encoded in relative retinal coordinates.
Journal ArticleDOI
Optimal nonlinear codes for the perception of natural colours.
TL;DR: Comparisons between theory and psychophysical and electro-physiological data are roughly consistent with the idea that parvocellular (P) cells are optimized for precision representation of colour: their contrast-response functions span a range appropriately matched to the environmental distribution of natural colours along each dimension of colour space.
Journal ArticleDOI
A neural computation for visual acuity in the presence of eye movements.
TL;DR: This work derives a decision rule for using retinal spike trains to discriminate between two stimuli, given that their retinal image moves with an unknown random walk trajectory, and dynamically estimates the probability of the stimulus at different retinal locations, and uses this to modulate the influence of retinal spikes acquired later.
Journal ArticleDOI
Color discrimination, color constancy and natural scene statistics
TL;DR: Does the visual system allocate discriminative ability to different regions in colour space in a way that optimizes discrimination among natural colours?
References
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Book
Signal detection theory and psychophysics
David M. Green,John A. Swets +1 more
TL;DR: This book discusses statistical decision theory and sensory processes in signal detection theory and psychophysics and describes how these processes affect decision-making.
Journal ArticleDOI
Functional architecture of the mammalian retina
TL;DR: Article de synthese sur l'architecture fonctionnelle de the retine chez les mammiferes: topographie de la retine; localisation, morphologie, fonctions and connections des cellules horizontales, bipolaires, amacrines and des cellule ganglionnaires.
Journal ArticleDOI
S‐potentials from colour units in the retina of fish (Cyprinidae)
K. I. Naka,W. A. H. Rushton +1 more
TL;DR: S‐potentials recorded from the excised tench retina left undisturbed in the optic cup show colour cells of the two types originally described by Svaetichin & MacNichol (1958).
Journal ArticleDOI
The primate retina contains two types of ganglion cells, with high and low contrast sensitivity
Ehud Kaplan,Robert Shapley +1 more
TL;DR: It is reported that the parallel analysis of color and luminance in the visual scene begins in the retina, probably at a retinal site distal to the ganglion cells.
Journal ArticleDOI
Retinal ganglion cells that project to the dorsal lateral geniculate nucleus in the macaque monkey
V.H. Perry,R. Oehler,Alan Cowey +2 more
TL;DR: Comparing the results with those of comparable investigations on cats and rabbits shows a much clearer segregation of the terminal targets of different classes of ganglion cell in monkeys, the greatest difference being the absence in the monkey of a projection to the geniculate from gamma- and epsilon-like cells.