Binocular Interactions In Suprathreshold Contrast Perception

Below is result for Binocular Interactions In Suprathreshold Contrast Perception in PDF format. You can download or read online all document for free, but please respect copyrighted ebooks. This site does not host PDF files, all document are the property of their respective owners.

Binocular interaction: contrast matching and contrast

Binocular interactions for contrast judgments 399 of the binocular summation stage (binsum) is given by: binsum = L m S +L+R + R S +R +L, (1) where L and R denote the left and right eye contrasts respectively (in %), m is the exponent of the initial accelerating nonlinearity and S is the saturation constant for the first stage of gain control.

Effect of overlaid luminance contrast on perceived color

we explore visual interactions between overlaid color and luminance contrast that are both suprathreshold and highly visible. We used a color-luminance plaid in which the perception of the color contrast and luminance contrast components were measured separately using a method of constant stimuli, to reveal

Suppression and Contrast Normalization in Motion Processing

interactions that we describe is captured by a cascade model in which both contrast normalization and mask-induced suppres-sion act in a divisive (i.e., nonlinear) manner at two stages, one monocular (mainly subcortical) and one binocular (cortical). Many properties of these inferred mechanisms are commensu-

Emotion-Induced Trade-Offs in Spatiotemporal Vision

low-contrast LSF information. Indeed, this is consistent with Phelps et al. s (2006) finding that a fearful face cue improves the perception of threshold LSF Gabors. However, by itself this does not explain the deficit for suprathreshold HSF Gabors that we obtained in a recent study (Bocanegra & Zeelenberg, 2009b).

Binocular treatment of amblyopia - cleverjournal.net

evidence shows that amblyopes possess binocular cortical mechanisms for both threshold and suprathreshold stimuli. Hence, there is an ongoing search for binocular stimulation methods. Detecting the condition early increases the chances of successful treatment and the earlier it is detected, more successful will be the treatment in equalizing

Psychological Science http://pss.sagepub.com/content/24/4/423

In contrast to the results of these studies, mounting neural evidence indicates that audiovisual interactions can take place at very early stages of processing, in primary sensory cortices (Shams et al., 2005; Watkins, Shams, Tanaka, Haynes, & Rees, 2006) or even subcortically (see Driver & Noesselt, 2008, for a review).

A common rule for integration and suppression of luminance

Similar contrast interactions between the eyes have been found in binocular vision (Legge, 1984), producing ocularity invariance (Baker, Meese, & Georgeson, 2007) the phenomenon that the contrast of the world looks very simi-lar with two eyes as with one, in spite of binocular summation of signals across the eyes (Baker et al.,

SOURCEBOOK OF TEMPORAL FACTORS AFFECTING o INFORMATION

Visual Displays Motion Perception Acuity Military Standards Flicker Display Design Contract Sensitivity Brightness Enhanrmint ,patjo Temnnr-1 AMrACr AC1- ,.rerse eb N esiy Identify by block ntombe,) Interactions This report collects in one document the important research literature on temporal factors in vision.

Task-irrelevant learning occurs only when the irrelevant

but not for the suprathreshold stimuli (for example, 50% coherence) nor the weakest stimuli (for example, 3% coherence). The mean motion threshold changed from 15.3 ± 0.8% before exposure to 13.0 ± 0.8% after exposure. The performance of the B H 3 G M K 2 A Paired direction Nonpaired direction Current Biology Figure 1. Exposure stage.

Perception & Psychophysics Lateral inhibition between

In the course of previous studies on interactions between spatial frequency channels when performing tasks in-volving the discrimination of changes in contrast of supra-threshold compound gratings, it was found that high-spatial-frequency channels show superlinearities in their response dependence on contrast (Sagi & Hochstein, 1983, 1984).

Binocular Combination of Contrast Signals from Orthogonal

contrast of the dichoptic plaid and the rules governing the binocular combination of contrast signals from orthogonal orientation channels. METHODS Stimulus It was shown in our previous paper (Liu et al., 1992) that square-wave gratings produced more stable dichoptic plaid perception than sinusoidal gratings.

Spatial Vision - gbv.de

Abnormalities of suprathreshold contrast perception 245 A possible physiological basis for spatial frequency and orientation selectivity of contrast sensitivity loss 246 Visual evoked potential delay 247 10. Spatiotemporal contrast vision in Parkinson's disease and MPTP-treated monkeys: 250 the role of dopamine L Bodis- Wollner and D. Regan

Assessing Binocular Interaction in Amblyopia and Its Clinical

binocular summation in amblyopia under some conditions, at both threshold [17,18] and suprathreshold levels [7,19 23]. Such interactions are best revealed by compensating for the contrast sensitivity deficit of the amblyopic eye, or equating the effective contrast of the two eyes. Moreover, prolonged exposure to

were also contrast specific. In normal

suggest that the interactions may be in-hibitory in nature (interactions not easily seen in single unit recordings) or that binocular interactions in humans de-prived of normal visual experience have an elevated threshold and are seen only when the stimuli presented to at least one eye have sufficient suprathreshold contrast (13). DENNIS M. LEVI

Binocular - BMJ

that, in the temporal contrast domain, when the Suprathreshold temporalfrequency Binocular interactions in normalandanomalous binocular vision: effects

Impairments of facial detection in tobacco use disorder

color perception, but also facial detection. Face detection requires extraction of what features arecommontofaces.9 The ability to detect and, subsequently, process the details of a visual scene is determined by the ability of the visual system to isolate and characterize differences in contrast, color, and shape,

Texture contrast aftereffects are monocular; texture density

suprathreshold contrast aftereffects are produced by different mechanisms (Snowden & Hammett, 1992, 1996; Ross & Speed, 1996). Chubb, Sperling, and Solomon (1989) showed that perceived texture contrast was subject to simultaneous contrast effects reflecting lateral interactions. This latter phenomenon has been

THE 9TH ASIA-PACIFIC CONFERENCE ON VISION (APCV 2013)

levels serve the perception of faces and biological motion. Empiri-cal studies in awake monkeys using free viewing of natural scenes show that classical and nonclassical RFs cooperate in forming a sparse representation of the visual world (Vinje & Gallant 2004).

Dual representations of a visual perceptual space Methods

Binocular viewing at 1m Contrast: 1.0 Duration: 120 ms (followed by mask) Target: 16 x 64 pixels on a 64 x 64 array TASK Find the location of the target stripe (4 AFC, top, right, bottom, left) In these sample stimuli, the background is the reference texture and the target stripe is displaced from it. Here, the target stripe is the reference

Human Amblyopia - mcgill.ca

Reclassify amblyopes based on binocular properties. Subjects who passed both randot stereoacuity test and binocular motion integration were assigned Aþbinocular.Aÿ Those who couldnAût pass were assigned Aþnon-binocularAÿ Deficits in Vernier acuity are much more severe in Aúnon-binocularAûgroup as compared to AúbinocularAû.

of - Science

Similar interactions occurred when the visual display was limited to restricted retinalregions, includingthesuppression scotoma. The binocular interactions were also contrast specific. In normal observers,whenthetestandbackground weresimilarin spatialfrequencyandori-entation, a background contrast below threshold lowered the threshold for dis-

Binocular combination in anisometropic amblyopia

whether suprathreshold cyclopean perception, which is most relevant for daily functional binocular vision, is normal in anisometropic amblyopia. We attempted to address this question in this study. A suprathreshold binocular summation paradigm devel-oped by Ding and Sperling (2006, 2007) for normal observers was used in the current study.

Center for Neural Science, New York University

perception. However. 2nd.Ofder motion does not seem to support structure-from- 'TM)tion computations (the kinetic depth effect). Significant 2nd-order spatial interactions and rru'tion computations occur monocularly (txfore binocular combination) as well in. terocutarly. Whereas 2nd-order stimuli. by their nature. are less information.nse than

PSYCHOLOGICAL SCIENCE Research Article

of a briefly presented, suprathreshold stimulus is reduced or eliminat-ed by the prior (forward masking; i.e., paracontrast) or subsequent (backward masking) presence of a surrounding or flanking stimulus. This kind of masking is typically attributed to low-level, preattentive interactions (see review in Breitmeyer, 1984), and therefore seemed

Binocular combination in abnormal binocular vision

asymmetric interocular interactions in binocular contrast perception, which was dependent on both contrast and A different approach to studying suprathreshold binocular interactions involves

Supplemental Information: Dichoptic training enables the

and all tetris blocks were visible to the amblyopic eye at 100% contrast. In the dichoptic training condition, the falling blocks were visible to the amblyopic eye at 100% contrast and the superficial ground plane blocks were visible to the fellow fixing eye at a reduced contrast to allow for binocular combination.

Author Manuscript NIH Public Access

Using a suprathreshold binocular summation paradigm developed by J. Ding and G. Sperling (2006,2007) for normal observers, we investigated suprathreshold cyclopean perception in anisometropic

The initial interactions underlying binocular rivalry require

report dominance of the adapted or non-adapted grating. This implies that the initial events in binocular rivalry involve later stages of visual processing. Keywords: binocular, visual crowding, adaptation Citation: Hancock, S., Whitney, D., & Andrews, T. J. (2008). The initial interactions underlying binocular rivalry require visual awareness.

Unconscious perception: The need for a paradigm shift

unconscious perception. Holender (1986b, Section 4.1) tried to refute Marcel s (1983b) interpretation of the role of central masking in en-abling unconscious perception on the ground that even under dichoptic backward masking, central integrative processes can probably impoverish the prime as much as can the more peripheral visual interactions.

Measurement of suprathreshold binocular interactions in amblyopia

Measurement of suprathreshold binocular interactions in amblyopia B. Mansouri, B. Thompson, R.F. Hess* McGill Vision Research, Department of Ophthalmology, McGill University, 687 Pine Ave W (H4-14), Montreal, Que., Canada PQ H3A 1A1 article info Article history: Received 31 March 2008 Received in revised form 13 August 2008 Keywords: Amblyopia

DiCE: Dichoptic Contrast Enhancement for VR and Stereo

inluences the perception of dichoptic contrast. Binocular interactions in suprathreshold contrast perception. Attention,Perception,&Psychophysics30, 1 (1981

The perceived depth from disparity as function of luminance

luminance contrast in the image, providing significant limitations on depth perception at low contrasts in a lawful manner but that are incompatible with existing models of cortical disparity processing. Introduction Binocular disparity occurs when an object in the scene projects to different locations in the left and right eye images.

A re-examination of dichoptic tone mapping methods

Binocular Tone Mapping. ACM Transactions on Graphics (SIGGRAPH Conference Proceedings). 7. Kingdom & Libenson (2015). Dichoptic Colour Saturation Masking is Unmasked by Binocular Luminance Contrast. Vision Research. 8. Legge & Rubin (1981). Binocular Interactions in Suprathreshold Contrast Perception.Perception & Psychophysics 9. Ding, Klein

DiCE: Dichoptic Contrast Enhancement for VR and Stereo

influences the perception of dichoptic contrast. Apparatus and Participants. This experiment shares the same Binocular interactions in suprathreshold contrast

The role of disparity interactions in perception of the 3D

as specified by binocular disparity, asking both what interactions are present through the disparity dimension and how these interactions vary with the spa-tial location of the disparate targets. Answering these questions is basic to the understanding of the visual processing of the 3D environment in which we find ourselves.

DiCE: Dichoptic Contrast Enhancement for Binocular Displays

Gordon E Legge and Gary S Rubin. 1981. Binocular interactions in suprathreshold contrast perception. Attention,Perception,&Psychophysics30, 1 (1981), 49ś61. Peter Vangorp, Rafat K Mantiuk, Bartosz Bazyluk, Karol Myszkowski, Radosław Man-tiuk, Simon J Watt, and Hans-Peter Seidel. 2014. Depth from HDR: depth induction or increased realism?.

Human Amblyopia - mcgill.ca

Peak Contrast Sensitivity! Perception: interocular ratio Perception: interocular ratio (Strength of deficit) ocular ratio ength of Deficit) ocular ratio Note: perceptual deficits are greater than seen in V1 Degree of amblyopia correlates with ! the amount of binocular suppression! * Strong implication of extrastriate!!