The effect of contour closure on the rapid discrimination of two-dimensional shapes.

abstract：:Dopaminergic and indoleamine accumulating neurons can be demonstrated both in the light and the electron microscopes. Considerable differences have been found between different animal species. There are two types of dopaminergic neurons, the interamacrine cells and the interplexiform cells. The interamacrine cells con...

journal_title：Vision research

authors： Ehinger B

更新日期：1983-01-01 00:00:00

abstract：:Spectral sensitivity was measured in freely moving, light adapted goldfish using a behavioral training technique. The curve reveals 3 pronounced maxima at 470, 540 and 660 nm. Compared with the absorption spectra of the cone photopigments with lambda max at 450, 530 and 625 nm, the maxima were much narrower and shifte...

journal_title：Vision research

authors： Neumeyer C

更新日期：1984-01-01 00:00:00

abstract：:Vergence angle and accommodative state were assessed photographically in 3-, 6-, and 12-month old infants. In the dark, fluctuations of vergence and accommodation were generally uncorrelated among all groups. The vergence-accommodation functions obtained in the dark had a mean slope of 0.04. These findings provide evi...

journal_title：Vision research

authors： Aslin RN,Dobson V

更新日期：1983-01-01 00:00:00

abstract：:A simulated field test was designed to determine whether the Holmes-Wright A lantern (HWA) is a valid color vision test for the rail industry. The simulation replicated viewing rail signal lights at 0.8 km distance under daylight conditions. Using the worst-normal as the maximum number of allowable errors on the simul...

journal_title：Vision research

authors： Hovis JK,Oliphant D

更新日期：1998-11-01 00:00:00

abstract：:Human beings perceive 3D shapes veridically, but the underlying mechanisms remain unknown. The problem of producing veridical shape percepts is computationally difficult because the 3D shapes have to be recovered from 2D retinal images. This paper describes a new model, based on a regularization approach, that does th...

journal_title：Vision research

authors： Li Y,Pizlo Z,Steinman RM

更新日期：2009-05-01 00:00:00

abstract：:We present a two-frequency method to investigate lateral interaction components (liERGs) in the human electroretinogram. Adjacent half cycles of sinusoidal gratings were modulated sinusoidally with different temporal frequencies f1 and f2. The liERGs were defined by the Fourier components at the intermodulation freque...

journal_title：Vision research

authors： Meigen T,Prüfer R,Reime S,Friedrich A

更新日期：2005-10-01 00:00:00

abstract：:The classification behaviour of human observers with respect to compound Gabor signals is tested at foveal and extrafoveal retinal positions. Classification performance is analysed in terms of a probabilistic classification model recently proposed by Rentschler, Jüttner and Caelli [(1994) Vision Research, 34, 669-687]...

journal_title：Vision research

authors： Jüttner M,Rentschler I

更新日期：1996-04-01 00:00:00

abstract：:Macular degeneration results in heterogeneous central field loss (CFL) and often has asymmetrical effects in the two eyes. As such, it is not clear to what degree the movements of the two eyes are coordinated. To address this issue, we examined smooth pursuit quantitatively in CFL participants during binocular viewing...

journal_title：Vision research

authors： Shanidze N,Heinen S,Verghese P

更新日期：2017-12-01 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

authors： Badcock DR,Derrington AM

更新日期：1987-01-01 00:00:00

abstract：:We study the "color weight" for a number of rather different paradigms. In well researched heterochromatic photometry methods we find that the "weights" determined by settings of naive observers are closely determined by the CIE luminance functional. This is very different for tasks that involve mid- and high-level as...

journal_title：Vision research

authors： Koenderink J,van Doorn A,Gegenfurtner K

更新日期：2018-10-01 00:00:00

abstract：:The effects of the involuntary ocular oscillations on visual resolution was examined in 22 albinos and 11 idiopaths with congenital nystagmus. The idiopaths showed a linear relationship between the proportion of the slow phase spent at low velocities (less than or equal to deg/sec) and the log of the minimum angle of ...

journal_title：Vision research

authors： Abadi RV,Pascal E

更新日期：1991-01-01 00:00:00

abstract：:An observer's ability to discriminate the angular direction of a moving grating depends on the grating orientation. Observers can more accurately judge the angular direction of vertical or horizontal gratings than oblique gratings. We discovered that this oblique effect becomes very large at high spatial frequencies i...

journal_title：Vision research

authors： Coletta NJ,Segu P,Tiana CL

更新日期：1993-12-01 00:00:00

abstract：:We determined normative values for the visual sensitivity threshold in 118 children aged 5-8 years, using automated static perimetry (Octopus 2000R, program 32). In addition, 17 normal adults were tested. The children first underwent a familiarization procedure. One week later, quantitative examination was performed a...

journal_title：Vision research

authors： Tschopp C,Safran AB,Viviani P,Reicherts M,Bullinger A,Mermoud C

更新日期：1998-07-01 00:00:00

abstract：:Achromatic losses in glaucoma would be expected to be greater than, or equal to, red-green chromatic losses if the following assumptions are made: (1) the function of the remaining axons is either unchanged or non-selectively reduced; (2) red-green chromatic information is signaled by the midget ganglion cell system; ...

journal_title：Vision research

authors： Alvarez SL,Pierce GE,Vingrys AJ,Benes SC,Weber PA,King-Smith PE

更新日期：1997-08-01 00:00:00

abstract：:Experiments were performed to evaluate the spatial summation areas of the u.v.-, blue-, green- and red-sensitive cone mechanisms of goldfish. All the cone mechanisms were in compliance of Ricco's law, summing target radiance linearly over a certain range of target diameters with an average slope of 2.4. The critical d...

journal_title：Vision research

authors： Hawryshyn CW

更新日期：1991-01-01 00:00:00

abstract：:Age-related macular degeneration (AMD) is characterized by a central vision loss. Here, we investigated the ability of AMD patients to process the spatial frequency content of scenes in their residual vision, depending of the luminance contrast level. AMD patients and normally-sighted elderly participants (controls) p...

journal_title：Vision research

authors： Peyrin C,Ramanoël S,Roux-Sibilon A,Chokron S,Hera R

更新日期：2017-01-01 00:00:00

abstract：:Previous studies have shown that spatial context influences the perceptual interpretation of ambiguous figures such as the Necker cube; however, the properties that mediate the influences of an unambiguous spatial context have yet to be investigated. Here we consider the effect of the motion and position of an unambig...

journal_title：Vision research

authors： Ouhnana M,Kingdom FAA

更新日期：2016-09-01 00:00:00

abstract：:The perception of blackness was investigated by measuring spectral efficiency and field additivity under conditions of temporal induction. For both purposes, observers foveally viewed a 0.75 deg, inducing stimulus for 5 sec followed immediately (or 200 msec later) by a broadband (5500 K) reference stimulus of the same...

journal_title：Vision research

authors： Volbrecht VJ,Werner JS

更新日期：1989-01-01 00:00:00

abstract：:Adaptation paradigms highlight the dynamic nature of face coding and suggest that identity is coded relative to an average face that is tuned by experience. In low-level vision, adaptive coding can enhance sensitivity to differences around the adapted level. We investigated whether sensitivity to differences around th...

journal_title：Vision research

authors： Rhodes G,Maloney LT,Turner J,Ewing L

更新日期：2007-03-01 00:00:00

abstract：:We measured the pupillary light reflex (PLR) in 5 pigmented, Long Evans rats (under urethan sedation) in three conditions: direct stimulation, consensual stimulation, and a control condition designed to measure the effects of stray light. The average constriction (maximal amplitude) produced by a ganzfeld stimulus del...

journal_title：Vision research

authors： Trejo LJ,Rand MN,Cicerone CM

更新日期：1989-01-01 00:00:00

abstract：:Previous psychophysical studies have revealed that shape similarity can affect apparent motion correspondence. Such results however, do not specify the level of representation, at which shape similarity is defined. We sought to understand this question by using a 2 x 2 competitive apparent motion paradigm. We manipula...

journal_title：Vision research

authors： He ZJ,Nakayama K

更新日期：1994-08-01 00:00:00

abstract：:As impaired S-cone function has been reported psychophysically this study assessed S-cone function during high altitude exposure using electroretinography (ERG) and investigated a possible association with severity of acute mountain sickness (AMS). This work is related to the Tübingen High Altitude Ophthalmology (THAO...

journal_title：Vision research

authors： Schatz A,Dominik Fischer M,Schommer K,Zrenner E,Bartz-Schmidt KU,Gekeler F,Willmann G

更新日期：2014-04-01 00:00:00

abstract：:It has been proposed that there is a perceptual compensation for the difference between the speeds of light and sound. We examined this possibility using a range of auditory-visual tasks, in which performance depends on the relative timing of auditory and visual information, and manipulated viewing distance to test fo...

journal_title：Vision research

authors： Arnold DH,Johnston A,Nishida S

更新日期：2005-05-01 00:00:00

abstract：:We compared the effectiveness of central and peripheral targets in a saccadic countermanding task. Stop-signal reaction times (SSRTs) do not differ significantly for central and peripheral stop signals. Further, when central and peripheral stop signals are presented together, SSRTs behave as expected of independent pr...

journal_title：Vision research

authors： Asrress KN,Carpenter RH

更新日期：2001-09-01 00:00:00

abstract：:Visual search can simply be defined as the task of looking for objects of interest in cluttered visual environments. Typically, the human visual system succeeds at this by making a series of rapid eye movements called saccades, interleaved by discrete fixations. However, very little is known on how the brain programs ...

journal_title：Vision research

authors： Tavassoli A,Linde Iv,Bovik AC,Cormack LK

更新日期：2009-01-01 00:00:00

abstract：:The striate cortex of macaque monkeys contains an array of patches which stain heavily for the enzyme cytochrome oxidase (CO blobs). Cells inside and outside these blobs are often described as belonging to two distinct populations or streams. In order to better understand the function of the CO blobs, we measured the ...

journal_title：Vision research

authors： Edwards DP,Purpura KP,Kaplan E

更新日期：1995-06-01 00:00:00

abstract：:Morphological patterns of the retina, cone size and density, rod density, rod-cone ratio, ganglion cell density, convergence of receptor cells, resolving power (RP) and regionalization were examined throughout life history in roach and in adults of asp, bream, common carp, roach and sabre carp. The retina of hatchling...

journal_title：Vision research

authors： Zaunreiter M,Junger H,Kotrschal K

更新日期：1991-01-01 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

authors： Szlyk JP,Seiple W,Xie W

更新日期：1995-06-01 00:00:00

abstract：:The aim of this study was twofold, first to determine the effect of field view size and second of illumination conditions on the selection of unique hue samples (UHs: R, Y, G and B) from two rotatable trays, each containing forty highly chromatic Natural Color System (NCS) samples, on one tray corresponding to 1.4° an...

journal_title：Vision research

authors： Shamey R,Zubair M,Cheema H

更新日期：2015-08-01 00:00:00

abstract：:Previous experiments testing grating and vernier acuities in albino central vision are consistent with the hypothesis that the deficit in their monocular spatial processing is mainly due to the increased spacing of their foveal cones. This was tested by measuring albino spatial frequency discrimination over the range ...

journal_title：Vision research

authors： Yo C,Wilson HR,Mets MB,Ritacco DG

更新日期：1989-01-01 00:00:00