Abstract:
:In order to assess the contribution of high spatial frequency channels (i.e. local, edge-dependent mechanisms) to the grating induction effect, grating induction magnitude was measured as a function of systematic amounts of blurring of the inducing/test field boundary for four test field heights which spanned a two octave range (0.25-2.0 degrees). Measurements were obtained from two subjects using both the cancelling procedure of McCourt [(1982) Vision Research, 22, 119-134] and a contrast matching paradigm. The two measures yielded similar outcomes: consistent with previous results, both matching and cancelling contrast decreased monotonically with increasing test field height. The effect of blurring the edge was to produce a small (eta 2 = 0.6-5.1%), but significant (P < 0.001), increase in grating induction magnitude. A second experiment utilized the contrast matching paradigm to investigate the effect of edge blur at extreme values (i.e. zero blur and maximum blur) on grating induction magnitude across a four octave range of spatial frequency (0.0625-1.0 c/deg). The results of the matching procedure were again consistent with those obtained previously using the cancelling technique: grating induction magnitude decreased monotonically with increasing spatial frequency. The effect of blurring was to produce a modest (eta 2 = 1.0-2.8%), but significant (P < 0.001), elevation in induction magnitude. These results lead to the conclusion that, unlike some other brightness effects, visual spatial filters selectively sensitive to high spatial frequencies, or to the edges which they sharpen, are not essential for the production of the grating induction effect.
journal_name
Vision Resjournal_title
Vision researchauthors
McCourt ME,Blakeslee Bdoi
10.1016/0042-6989(93)90130-osubject
Has Abstractpub_date
1993-12-01 00:00:00pages
2499-507issue
17eissn
0042-6989issn
1878-5646pii
0042-6989(93)90130-Ojournal_volume
33pub_type
杂志文章相关文献
VISION RESEARCH文献大全abstract::Using new geometric information on the shape of the lens that has recently become available, a finite element model has been developed in order to estimate the forces that act on the lens during accommodation for a typical 29-year-old human eye. To investigate the influence of the anterior, posterior and central zonul...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.04.012
更新日期:2006-10-01 00:00:00
abstract::We examined variation in the visual system both within and among seven species of darters, colorful freshwater fishes of the genus Etheostoma. Using microspectrophotometry, we found that darters possess rod photoreceptor cells, single cone photoreceptor cells containing middle wavelength sensitive (MWS) visual pigment...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2011.12.005
更新日期:2012-02-15 00:00:00
abstract::Some theories for visual receptive fields postulate that they depend on the image statistics of the natural habitat. Consequently, different habitats may lead to different receptive fields. We thus decided to study how some of the most relevant statistics vary across habitats. In particular, atmospheric and underwater...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(03)00471-1
更新日期:2003-11-01 00:00:00
abstract::We compared the mechanisms responsible for orientation discrimination of stimuli defined by luminance and red/green isoluminant contrast. A four-alternative forced-choice (4-AFC) paradigm was used to determine thresholds for discriminating 1 cpd sinewave gratings differing in orientation, contrast, or both. When measu...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00240-x
更新日期:1998-04-01 00:00:00
abstract::The ability to identify faces is of critical importance for normal social interactions. Previous evidence suggests that early visual deprivation may impair certain aspects of face recognition. The effects of strabismic amblyopia on face processing have not been investigated previously. In this study, a group of indivi...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.01.007
更新日期:2013-03-22 00:00:00
abstract::The factors potentially determining the dynamics of horizontal cell (HC) responses are: (1) the rate of transmitter release (including its transient component) and removal; (2) the voltage non-linearity of HC non-synaptic membrane combined with its capacitance; and (3) the dynamics of feedback from HCs to photorecepto...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(96)00130-7
更新日期:1996-12-01 00:00:00
abstract::We describe and analyze an appearance-based 3-D object recognition system that avoids some of the problems of previous appearance-based schemes. We describe various large-scale performance tests and report good performance for full-sphere/hemisphere recognition of up to 24 complex, curved objects, robustness against c...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(98)00030-3
更新日期:1998-08-01 00:00:00
abstract::To investigate the relative sensory and perceptual contributions to central visual function of patients with retinitis pigmentosa (RP), we tested symmetry discrimination using block patterns with varying types of symmetric organization. Eleven control subjects with normal vision and 11 patients with RP with 20/30 visu...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)00275-q
更新日期:1995-06-01 00:00:00
abstract::The flash-lag effect (FLE) is defined as an error in localization that consists of perceiving a flashed object to lag behind a moving one when both are presented in physical alignment. Previous studies have addressed the question if it is the predictability of the flash, or the moving object, that modulates the amount...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2005.11.016
更新日期:2006-06-01 00:00:00
abstract::Evidence obtained using the dynamic grouping method has shown that the grouping of an object's connected surfaces has properties characteristic of a nonlinear dynamical system. When a surface's luminance changes, one of its boundaries is perceived moving across the surface. The direction of this dynamic grouping (DG) ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2015.06.006
更新日期:2016-09-01 00:00:00
abstract::Current theories of second-order motion perception postulate that such motion is detected by either a high-level mechanism which computes the temporal correspondences between "features" extracted from the image, or low-level motion mechanisms which operate on a nonlinear, neural transformation of the luminance profile...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)90229-1
更新日期:1994-10-01 00:00:00
abstract::Contrast detection performance is known to be better for single component sinusoidal gratings than for sums of gratings at different orientations. A recent study Rovamo et al. (1994) (Investigative Ophthalmology and Visual Science, 35, 2611-2619) showed that spatial integration is less effective for multiple orientati...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(96)00233-7
更新日期:1997-04-01 00:00:00
abstract::Texture information about surface shape can be decomposed into three constituents: compression, density and scaling. Blake, Bülthoff and Sheinberg's (1993, Vision Research, 33, 1723-1737) Ideal Observer theory of slant from texture predicts that the relative contribution of compression and density to the percept of pl...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(95)00177-8
更新日期:1996-04-01 00:00:00
abstract::Human subjects perceive two crossing bars, one in front of the other, when shown a cross with disparity added to its horizontal limbs, and they also perceive neon-color spreading when shown a stereoscopic Redies-Spillmann figure. It has thus been hypothesized that the human visual system follows the principle of gener...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(98)00305-8
更新日期:1999-07-01 00:00:00
abstract::We describe an extraocular muscle (EOM) force transducer that provides low-noise signals from an alert animal for several months, is implanted without disinserting the muscle, and is well-tolerated by the body, and present results obtained with the device. The transducer can be used to study orbital statics and dynami...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(92)90010-g
更新日期:1992-06-01 00:00:00
abstract::Binocular rivalry properties for contrast-modulated (CM) gratings were examined to gain insight into their locus of processing. Two orthogonally orientated gratings were presented, one to each eye. Perceptual change rates, proportions of exclusivity and mixed percepts, and mean durations were calculated. Stimuli were ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2016.01.002
更新日期:2016-04-01 00:00:00
abstract::A theory of retinal colour coding based closely on recent anatomical and physiological results is presented. Opponent colour channels are shown to be an inevitable result of any randomly distributed retinal cone mosaic, the structure of red-green opponent colour channels remaining uninfluenced by a predominance of "re...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90128-1
更新日期:1983-01-01 00:00:00
abstract::Recent evidence suggests a double dissociation of size and spacing limit on letter recognition-it is limited by size in the fovea and critical spacing in the normal periphery. Here, we evaluated whether size or spacing limits letter recognition in people with age-related macular degeneration (AMD) who must use their p...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.06.015
更新日期:2014-08-01 00:00:00
abstract::Accurate saccadic and vergence eye movements towards selected visual targets are fundamental to perceive the 3-D environment. Despite this importance, shifts in eye gaze are not always perfect given that they are frequently followed by small corrective eye movements. The oculomotor system receives distinct information...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2013.04.005
更新日期:2013-06-28 00:00:00
abstract::Varying short-range apparent motion (AM) stimulus displacements from 2.7 to 21.6 min it was found that VEP amplitudes varied as a function of the limits for short-range AM described using time-till-breakdown as a behavioural measure of AM strength. This VEP amplitude difference was, however, in the reverse direction t...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(91)90181-4
更新日期:1991-01-01 00:00:00
abstract::Contrast threshold for a sinusoidal target in the simultaneous presence of the vertically displaced peripheral gratings was measured as a function of the peripheral contrast and the separation. When the signal and peripheral gratings were in phase, the low-contrast peripheral gratings produced the improvement in signa...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(85)90086-0
更新日期:1985-01-01 00:00:00
abstract::A long-wavelength background can affect the appearance of an increment of light superimposed upon it in two ways. It can change the visual system's sensitivity to the increment, and it can change the appearance of the increment by directly adding redness to it. Through selective retinal-image stabilization, we evoked ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(93)90155-p
更新日期:1993-01-01 00:00:00
abstract::Mach bands are illusory bright and dark bands seen where a luminance plateau meets a ramp, as in half-shadows or penumbras. A tremendous amount of work has been devoted to studying the psychophysics and the potential underlying neural circuitry concerning this phenomenon. A number of theoretical models also have been ...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/0042-6989(95)00341-x
更新日期:1996-10-01 00:00:00
abstract::The critical durations for temporal integration at threshold were obtained for lights of various wavelengths, presented both against darkness and against achromatic or chromatic backgrounds of different luminances. The critical duration (tc) was defined by a point of intersection of the two lines with the slopes of ze...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90031-9
更新日期:1987-01-01 00:00:00
abstract::In this study, we show that negative polarity noise patterns appear to have a higher contrast than positive polarity noise patterns with identical expected Fourier amplitude spectra. This demonstrates a failure of contrast constancy over changes in pattern polarity. An examination of local contrast measures shows that...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(99)00110-8
更新日期:1999-12-01 00:00:00
abstract::A wide range of rest/stimulus cycle durations (40-360 sec) is reported to have been used by various groups for MRI neuroactivation studies of the visual cortex. In this paper we demonstrate a clear habituation-like response for longer cycle durations which results in a halving of apparent activation between cycle dura...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)85231-5
更新日期:1997-05-01 00:00:00
abstract::Thirty patients with a reduced central vision due to diseases of the posterior pole were examined with the VERIS system developed by Sutter and Tran (Vis Res 1992;32:433-446) to characterize the topography of electroretinographic (ERG) changes in comparison to the results in 30 normal volunteers. Diagnoses included St...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(98)00071-6
更新日期:1998-12-01 00:00:00
abstract::The predominance of rivalrous targets is affected by surrounding context when stimuli rival in orientation, motion or color. This study investigated the influence of chromatic context on binocular color rivalry. The predominance of rivalrous chromatic targets was measured in various surrounding contexts. The first exp...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2008.01.018
更新日期:2008-03-01 00:00:00
abstract::Sensitivity to the sudden displacement (phase shift) of a single monocularly presented sinusoidal grating is increased when a static grating of similar spatial frequency is presented to the same eye. If the static grating is presented to the other eye instead sensitivity is, at best, halved. This demonstration implies...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90076-9
更新日期:1987-01-01 00:00:00
abstract::In the past 20 years, there has been a great advancement in knowledge pertaining to compliance with amblyopia treatments. The occlusion dose monitor introduced quantitative monitoring methods in patching, which sparked our initial understanding of the dose-response relationship for patching amblyopia treatment. This r...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/j.visres.2015.02.012
更新日期:2015-09-01 00:00:00