Results 31 to 40 of about 1,633,491 (322)

Relationship between Visual Dysfunction and Retinal Changes in Patients with Multiple Sclerosis. [PDF]

open access: yesPLoS ONE, 2016
To evaluate structural changes in the retina and their correlation with visual dysfunction in patients with multiple sclerosis.Patients with multiple sclerosis (n = 84) and healthy controls (n = 84) underwent structural evaluation of the retinal nerve ...
Maria Satue   +10 more
doaj   +1 more source

Optimal measurement of visual motion across spatial and temporal scales [PDF]

open access: yes, 2014
Sensory systems use limited resources to mediate the perception of a great variety of objects and events. Here a normative framework is presented for exploring how the problem of efficient allocation of resources can be solved in visual perception ...
A Gorban   +47 more
core   +1 more source

Sex-related differences in chromatic sensitivity [PDF]

open access: yes, 2008
Generally women are believed to be more discriminating than men in the use of colour names and this is often taken to imply superior colour vision. However, if both X-chromosome linked colour deficient males (~8%) and females (
J.A. HARLOW   +7 more
core   +1 more source

Revisiting spatial vision: toward a unifying model [PDF]

open access: yes, 2000
We report contrast detection, contrast increment, contrast masking, orientation discrimination, and spatial frequency discrimination thresholds for spatially localized stimuli at 4° of eccentricity.
Braun, Jochen   +2 more
core   +2 more sources

Fearful faces have a sensory advantage in the competition for awareness [PDF]

open access: yes, 2015
Only a subset of visual signals give rise to a conscious percept. Threat signals, such as fearful faces, are particularly salient to human vision.
Adams, W. J., Garner, M., Hedger, N.
core   +2 more sources

Perception of global image contrast involves transparent spatial filtering and the integration and suppression of local contrasts (not RMS contrast) [PDF]

open access: yesRoyal Society Open Science, 2017
When adjusting the contrast setting on a television set, we experience a perceptual change in the global image contrast. But how is that statistic computed?
Tim S. Meese   +2 more
doaj   +1 more source

How Much Pigment Should Flowers Have? Flowers With Moderate Pigmentation Have Highest Color Contrast

open access: yesFrontiers in Ecology and Evolution, 2021
Floral pigments are a core component of flower colors, but how much pigment a flower should have to yield a strong visual signal to pollinators is unknown.
Casper J. van der Kooi
doaj   +1 more source

Adaptive polarimetric image representation for contrast optimization of a polarized beacon through fog

open access: yes, 2015
We present a contrast-maximizing optimal linear representation of polarimetric images obtained from a snapshot polarimetric camera for enhanced vision of a polarized light source in obscured weather conditions (fog, haze, cloud) over long distances ...
Alouini, Mehdi   +2 more
core   +2 more sources

A Bio-Inspired Vision Sensor With Dual Operation and Readout Modes [PDF]

open access: yes, 2016
This paper presents a novel event-based vision sensor with two operation modes: intensity mode and spatial contrast detection. They can be combined with two different readout approaches: pulse density modulation and time-to-first spike.
Carmona Galán, Ricardo   +3 more
core   +1 more source

A biologically inspired computational vision front-end based on a self-organised pseudo-randomly tessellated artificial retina [PDF]

open access: yes, 2005
This paper considers the construction of a biologically inspired front-end for computer vision based on an artificial retina pyramid with a self-organised pseudo-randomly tessellated receptive field tessellation.
Balasuriya, S., Siebert, J.P.
core   +1 more source

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