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4,696
Model of visual contrast gain control and pattern masking
- Journal of the Optical Society of America A
, 1997
"... We have implemented a model of contrast gain control in human vision which incorporates a number of key features, including a contrast sensitivity function, multiple oriented band-pass channels, accelerating nonlinearities, and a divisive inhibitory gain-control pool. The parameters of this model ha ..."
Abstract
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Cited by 154 (5 self)
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We have implemented a model of contrast gain control in human vision which incorporates a number of key features, including a contrast sensitivity function, multiple oriented band-pass channels, accelerating nonlinearities, and a divisive inhibitory gain-control pool. The parameters of this model
Abbreviated title: Design principles for contrast gain control
"... Information maximization as a principle for contrast gain control ..."
The contrast gain control of the cat retina
- Vision Res
, 1979
"... This paper is about a phenomenon, and a mechanism to explain the phenomenon. The observation is that the dynamic transfer properties of the cat retina are altered when the contrast of the visual stimulus is changed. The peculiar dependence of the “contrast effect ” on the spatial and temporal proper ..."
Abstract
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Cited by 13 (0 self)
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properties of the visual stimulus led us to the conclusion that the con-trast effect is caused by a separate and distinct retinal mechanism. We call this mechanism the contrast gain control. Our experiments are performed on single fibers in the optic tract of cats anesthetized with urethane and paralyzed
Contrast gain control in natural scenes
"... Behavioral and electrophysiological studies of visual processing routinely employ sine wave grating stimuli, an approach that has led to the development of models in which the first stage of cortical visual processing acts as a bank of narrowband local filters whose responses vary with the contrast ..."
Abstract
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Cited by 9 (2 self)
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. Unlike grating patterns, the contrast response to natural scenes depends on the phase structure at remote spatial scales, but over a limited spatial region. The results suggest that contrast gain control acts within, but not across, cortical hypercolumns and serves to reduce the difference between
Contrast Gain Control in the Lower Vertebrate Retinas
"... ABSTRACT Control of contrast sensitivity was studied in two kinds of retina, that of the channel catfish and that of the kissing gourami. The former preparation is dominantly monochromatic and the latter is bichromatic. Various stimuli were used, namely a large field of light, a spot-annulus configu ..."
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, in that the waveform and amplitude of the first-order kernels are independent of the depth of modulation. In the N (sustained) amacrine and ganglion cells, contrast sensitivity was low for a large modulation input and was high for a small modulation input, providing an example of contrast gain control. In most
Abstract SIMULATION OF RETINAL CONTRAST GAIN CONTROL MECHANISMS
"... I present a simulation of contrast gain control mechanisms operating among transient M-cells in the monkey's retina, in order to investigate the spatial consequences of this interaction. The simulation stages include a realistic viewing model, non-linear receptor model, linear spatial ltering a ..."
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I present a simulation of contrast gain control mechanisms operating among transient M-cells in the monkey's retina, in order to investigate the spatial consequences of this interaction. The simulation stages include a realistic viewing model, non-linear receptor model, linear spatial ltering
Simulation Of Retinal Contrast Gain Control Mechanisms
, 1996
"... I present a simulation of contrast gain control mechanisms operating among transient M-cells in the monkey's retina, in order to investigate the spatial consequences of this interaction. The simulation stages include a realistic viewing model, non-linear receptor model, linear spatial filtering ..."
Abstract
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I present a simulation of contrast gain control mechanisms operating among transient M-cells in the monkey's retina, in order to investigate the spatial consequences of this interaction. The simulation stages include a realistic viewing model, non-linear receptor model, linear spatial
Image Contrast Gain Control by Linear Neighbourhood Embedding
, 2005
"... In this paper, we present a method that adaptively computes a contrast gain control map for the image through the use of a novel technique termed linear neighborhood embedding (LNE) which first computes a locally linear relation for each pixel and its neighbors and then embeds these relations global ..."
Abstract
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In this paper, we present a method that adaptively computes a contrast gain control map for the image through the use of a novel technique termed linear neighborhood embedding (LNE) which first computes a locally linear relation for each pixel and its neighbors and then embeds these relations
Temporal dynamics of contrast gain in single cells of the cat striate cortex
- Visual Neuroscience
, 1991
"... The response amplitude of cat striate cortical cells is usually reduced after exposure to high-contrast stimuli. The temporal characteristics and contrast sensitivity of this phenomenon were explored by stimulating cortical cells with drifting gratings in which contrast sequentially incremented and ..."
Abstract
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Cited by 46 (0 self)
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and decremented in stepwise fashion over time. All responses showed a clear hysteresis, in which contrast gain dropped on average 0. Jog unit and then returned to baseline values within 60 s. Noticeable gain adjustments were seen in as little as 3 s and with peak contrasts as low as 30/0. Contrast adaptation
Results 1 - 10
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4,696
