Search Results - "GEORGESON, Mark"

Contrast adaptation and interocular transfer in cortical cells: A re-analysis & a two-stage gain-control model of binocular combination by Georgeson, Mark A, Sengpiel, Frank

“…How do V1 cells respond to, adapt to, and combine signals from the two eyes? We tested a simple functional model that has monocular and binocular stages of…”
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Binocular Summation Revisited: Beyond √2 by Baker, Daniel H, Lygo, Freya A, Meese, Tim S, Georgeson, Mark A

“…Our ability to detect faint images is better with two eyes than with one, but how great is this improvement? A meta-analysis of 65 studies published across…”
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Revealing the influence of bias in a letter acuity identification task: A noisy template model by Georgeson, Mark A., Barhoom, Hatem, Joshi, Mahesh R., Artes, Paul H., Schmidtmann, Gunnar

“…[Display omitted] •Do letter biases affect visual performance in letter acuity tasks?•Re-analysis and modelling of Sloan letter recognition as a function of…”
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Contrast and lustre: A model that accounts for eleven different forms of contrast discrimination in binocular vision by Georgeson, Mark A., Wallis, Stuart A., Meese, Tim S., Baker, Daniel H.

“…•Decrease of contrast in one eye didn’t cancel detection of an increase in the other.•With contrast in both eyes, decreases in one eye were harder to see than…”
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Enhanced text spacing improves reading performance in individuals with macular disease by Blackmore-Wright, Sally, Georgeson, Mark A, Anderson, Stephen J

“…The search by many investigators for a solution to the reading problems encountered by individuals with no central vision has been long and, to date, not very…”
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Luminance gradient at object borders communicates object location to the human oculomotor system by Kilpeläinen, Markku, Georgeson, Mark A.

“…The locations of objects in our environment constitute arguably the most important piece of information our visual system must convey to facilitate successful…”
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Binocular functional architecture for detection of contrast-modulated gratings by Georgeson, Mark A., Schofield, Andrew J.

“…•Detection of contrast modulation (CM) shows full binocular summation.•Similarity or dissimilarity of the carriers has no effect on summation.•Out-of-phase…”
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Adaptation to interocular difference by Kingdom, Frederick A A, Jennings, Ben J, Georgeson, Mark A

“…Patterns in the two eyes' views that are not identical in hue or contrast often elicit an impression of luster, providing a cue for discriminating them from…”
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Binocular contrast vision at and above threshold by Meese, Tim S, Georgeson, Mark A, Baker, Daniel H

“…A fundamental problem for any visual system with binocular overlap is the combination of information from the two eyes. Electrophysiology shows that binocular…”
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Interocular difference thresholds are mediated by binocular differencing, not summing, channels by Kingdom, Frederick A A, Seulami, Nour M, Jennings, Ben J, Georgeson, Mark A

“…Patterns in the two eyes' views that are not identical in hue or contrast often elicit an impression of luster, providing a cue for discriminating them from…”
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The effect of interocular phase difference on perceived contrast by Baker, Daniel H, Wallis, Stuart A, Georgeson, Mark A, Meese, Tim S

“…Binocular vision is traditionally treated as two processes: the fusion of similar images, and the interocular suppression of dissimilar images (e.g. binocular…”
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Direction discrimination thresholds in binocular, monocular, and dichoptic viewing: Motion opponency and contrast gain control by Maehara, Goro, Hess, Robert F, Georgeson, Mark A

“…We studied the binocular organization of motion opponency and its relationship to contrast gain control. Luminance contrast thresholds for discriminating…”
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Binocular fusion, suppression and diplopia for blurred edges by Georgeson, Mark A., Wallis, Stuart A.

“…Purpose (1) To devise a model‐based method for estimating the probabilities of binocular fusion, interocular suppression and diplopia from psychophysical…”
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The slope of the psychometric function and non-stationarity of thresholds in spatiotemporal contrast vision by Wallis, Stuart A., Baker, Daniel H., Meese, Tim S., Georgeson, Mark A.

“…• How do stimulus size, shape and spatiotemporal frequency affect psychometric function slope? • Slope was fairly constant (Weibull β≈3) across almost all…”
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Linear binocular combination of responses to contrast modulation: contrast-weighted summation in first- and second-order vision by Zhou, Jiawei, Georgeson, Mark A, Hess, Robert F

“…Binocular combination for first-order (luminance-defined) stimuli has been widely studied, but we know rather little about this binocular process for spatial…”
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Nonlinearities in the binocular combination of luminance and contrast by Baker, Daniel H., Wallis, Stuart A., Georgeson, Mark A., Meese, Tim S.

“…► Investigates how both luminance and contrast are combined across the eyes. ► Measure equibrightness curves using matching paradigm. ► Implied nonlinearity…”
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Sun and sky: Does human vision assume a mixture of point and diffuse illumination when interpreting shape-from-shading? by Schofield, Andrew J., Rock, Paul B., Georgeson, Mark A.

“…► Shape-from-shading was assessed using sine wave grating stimuli. ► Offsets between luminance peaks and surface peaks varied with orientation. ► This effect…”
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Brightening and Dimming Aftereffects at Low and High Luminance by Hassan, Omar, Georgeson, Mark, Hammett, Stephen

“…Adaptation to a spatially uniform field that increases or decreases in luminance over time yields a “ramp aftereffect”, whereby a steady, uniform luminance…”
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Neural adjustments to image blur by Webster, Michael A, Georgeson, Mark A, Webster, Shernaaz M

“…Blur is an intrinsic feature of retinal images that varies widely across images and observers, yet the world still typically appears 'in focus'. Here we…”
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Mach bands and multiscale models of spatial vision: the role of first, second, and third derivative operators in encoding bars and edges by Wallis, Stuart A, Georgeson, Mark A

“…Ernst Mach observed that light or dark bands could be seen at abrupt changes of luminance gradient in the absence of peaks or troughs in luminance. Many models…”
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