Abstract:
:Discrimination between a figure and its surround is an important first step of pattern recognition. This discrimination usually relies, as a first step, on the detection of borders between a figure and its surround, for example based on spatial gradients in luminance, colour, or texture. There is evidence that neurones in the visual cortex are specifically activated by segregation between textures, but the relation between segregation based on different types of features such as colour, luminance, and motion is unclear. Evoked EEG potentials specific to texture segregation were investigated in 17 observers in two separate experiments and by means of functional magnetic resonance imaging in a separate study (Fahle et al., in preparation). Differences in either luminance, colour, line orientation, motion, or stereoscopic depth defined a checkerboard pattern. Patterns defined by each of these features elicited segregation-specific potentials. In contrast to earlier reports (Vision Research 37 (1997) 1409), however, we find pronounced differences between the segregation-specific potentials evoked through different features, especially regarding their peak latencies. The topographical distribution of the activity evoked reveals different polarities and partly specific locations for different stimulus features, indicating the existence of different processors for texture segregation based on different features.
journal_name
Vision Resjournal_title
Vision researchauthors
Fahle M,Quenzer T,Braun C,Spang Kdoi
10.1016/s0042-6989(02)00265-1subject
Has Abstractpub_date
2003-01-01 00:00:00pages
7-19issue
1eissn
0042-6989issn
1878-5646pii
S0042698902002651journal_volume
43pub_type
杂志文章相关文献
VISION RESEARCH文献大全abstract::We recently reported a new motion illusion where dots in expanding random dot patterns appear to move faster than those in rotation patterns despite having the same physical speed distributions. In the current paper, we compared expansion and rotation motion to translational motion and found that the perceived dot spe...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00279-4
更新日期:1998-05-01 00:00:00
abstract::Glutamate is the major excitatory neurotransmitter in the vertebrate retina. Native glutamate transporters have been well characterized in several retinal neurons, particularly from the salamander retina. We have cloned five distinct glutamate transporters from the salamander retina and examined their localization and...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00452-5
更新日期:1998-05-01 00:00:00
abstract::We measured the spatial receptive field dimensions of cells in the lateral geniculate nucleus (LGN) of the common marmoset (Callithrix jacchus) using a bipartite field stimulus in which the two halves of the field were modulated identically but in counterphase. Horizontal and vertical edges between the two fields were...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00041-2
更新日期:1997-08-01 00:00:00
abstract::Ring-billed gulls (Larus delawarensis) and gray gulls (Larus modestus) are two species active both by day and night. We have investigated the retinal adaptations that allow the diurnal and nocturnal behaviours of these two species. Electroretinograms and histological analyses show that both species have a duplex retin...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2006.02.023
更新日期:2006-09-01 00:00:00
abstract::Rapid texture segregation is examined using filtered noise textures. The stimuli consist of a foreground region of filtered noise with one dominant texture orientation against a background region with a different dominant orientation. Shape discrimination of the foreground region is measured as a function of the diffe...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(91)90009-t
更新日期:1991-01-01 00:00:00
abstract::The present study demonstrates that an object embedded in an array of identical objects can pop-out. Dependent on the stimuli preceding the search display, local (chromatic) adaptation causes an identical object to pop-out because it appears to have a colour (Expt 1) or brightness (Expt 2) that is slightly different f...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(93)90113-b
更新日期:1993-11-01 00:00:00
abstract::Colorimetric purity, measured as the first step from white toward the spectrum has a V-shaped function. Purity discrimination is best near 400 nm, least at 570 nm and intermediate at mid-spectrum and long wavelengths. A much flatter function occurs when colorimetric purity is measured as the first step from the spectr...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(93)90175-v
更新日期:1993-09-01 00:00:00
abstract::The orientation disparity field from two orthographic views of an inclined planar surface patch (covered by straight lines) is analyzed, and a new tool to extract the patch orientation is provided: the function coupling the average orientation of each pair of corresponding surface contours with their orientation dispa...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2008.08.015
更新日期:2008-11-01 00:00:00
abstract::The apparent motion of a discretely displaced complex waveform with a periodic contrast modulation or "beat" of frequency f and sinusoidal components of frequencies 3f and 4f was examined at various interstimulus intervals (ISIs). At short ISIs perception of motion of both the beat and an aliased component of the wave...
journal_title:Vision research
pub_type: 信件
doi:10.1016/0042-6989(93)90245-r
更新日期:1993-05-01 00:00:00
abstract::Reentrant processing has been proposed as a critical mechanism in visual perception of an object's features. In order to test whether reentry is critical for visual awareness of object presence, the success of reentry was manipulated with object substitution masking (OSM) while participants performed a forced-choice t...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2012.05.001
更新日期:2012-06-15 00:00:00
abstract::The visual pigments in the rods do not have a special absorption that gives them maximal sensitivity. The visual pigments of "deep sea" fish are an exception for these do match the environmental light to give maximum sensitivity. At the low light intensities at which the rods operate, it is the number of photons that ...
journal_title:Vision research
pub_type: 杂志文章,评审
doi:10.1016/s0042-6989(84)80003-6
更新日期:1984-01-01 00:00:00
abstract::Blurred images may appear sharper when drifting than when stationary. But, paradoxically, moving sharp edges may appear more blurred. To resolve this paradox, the perceived sharpness of drifting, blurred, square wave gratings was compared with that of their static analogues over a range of speeds, blurs and spatial fr...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(97)00430-6
更新日期:1998-07-01 00:00:00
abstract::Psychophysical studies of interactions between contours defined by different image attributes report that luminance-defined and illusory contours show little if any interaction. Because the contours defined by these attributes may vary in perceptual saliency, we employed the tilt aftereffect (TAE) and a cross-adaptati...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)90333-6
更新日期:1994-01-01 00:00:00
abstract::Observers viewed 200 msec presentations of gratings containing first (0.5 c/deg) and third (1.5 c/deg) harmonic components. The phase of the third harmonic and the absolute position of the grating on the screen varied randomly from trial to trial. Classification of the phase relation (0, 90, 180 or 270 deg was 99% per...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(84)90157-3
更新日期:1984-01-01 00:00:00
abstract::Interocular transfer of the motion aftereffect (MAE) has been extensively investigated for the purpose of analysing the binocularity of the underlying motion mechanism. Previous studies unanimously reported that the transfer of the classical static MAE is partial, but there is a controversy as to whether the transfer ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(99)00176-5
更新日期:2000-01-01 00:00:00
abstract::Reach and grasp movements are a fundamental part of our daily interactions with the environment. This spatially-guided behavior is often directed to memorized objects because of intervening eye movements that caused them to disappear from sight. How does the brain store and maintain the spatial representations of obje...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2011.01.004
更新日期:2011-04-22 00:00:00
abstract::We present a remarkably simple illusion that manifests whenever a certain class of flat static patterns are moved across our peripheral visual field. A relative motion is perceived in a direction perpendicular to the true motion. Translatory, looming, and rotational movements of the head or the pattern can all elicit ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(00)00072-9
更新日期:2000-01-01 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 color vision of five saddle-backed tamarins (Saguinus fuscicollis) was studied. Behavioral tests of color discrimination and spectral sensitivity indicate that this species has a color vision polymorphism. Individual monkeys have either dichromatic or trichromatic color vision. Measurements of the spectral sensiti...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(87)90123-4
更新日期:1987-01-01 00:00:00
abstract::It is well known how early visual experience is critical for the development of multisensory processing abilities, and for this reason an early vision impairment could hinder the transfer of different sensory information during the exploration and recognition of the surrounding environment. Recently, we verified that ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2020.06.008
更新日期:2021-01-01 00:00:00
abstract::Light and darkness promote opposite migrations of screening pigment granules in the retinal photoreceptors of the crayfish and other arthropods, and microtubules have been implicated in this part of the adaptation process. This report considers the topographic relationships of the migratory pigment granules with the m...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(82)90217-6
更新日期:1982-01-01 00:00:00
abstract::A coordinated movement of the eyes and head in the head-unrestrained condition is often used to change orientation between targets. Under natural conditions, these gaze shifts are typically generated with the eyes roughly centered in the orbits. To achieve experimental control of eye and head positions, a miniature la...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(01)00054-2
更新日期:2001-01-01 00:00:00
abstract::The spatial properties of horizontal cells in the tiger salamander retina were studied with intracellular electrodes. It was found that when the rod input to horizontal cells is dominant the receptive fields are smaller than those measured under conditions of strong cone activation. A possible explanation for this fin...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(83)90024-x
更新日期:1983-01-01 00:00:00
abstract::Perception of visual motion includes a first-order mechanism sensitive to luminance changes and a second-order motion mechanism sensitive to contrast changes. We studied neural substrates for these motion types in 142 subjects with visual cortex lesions, 68 normal controls and 28 brain lesion controls. On first-order ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2008.03.005
更新日期:2008-11-01 00:00:00
abstract::Pulses of low intensity current, delivered through a cuff electrode chronically implanted around the optic nerve of a blind retinitis pigmentosa patient generate visual sensations. These phosphenes are obtained at lower thresholds for a train of stimuli than for single pulses, which suggests the existence of a spatial...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(03)00013-0
更新日期:2003-04-01 00:00:00
abstract::The ability to judge the separation between two target lines deteriorates as the base separation increases. Several lines of evidence suggest that this may be due to larger base separations being processed by mechanisms that cover larger areas and which have a greater associated positional uncertainty as a consequence...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(94)90206-2
更新日期:1994-05-01 00:00:00
abstract::Increment-threshold spectral sensitivity functions were taken foveally and at four other retinal locations with different sized test stimuli. For the fovea and parafovea at 4 degrees, a 1 degree, 250 msec stimulus of variable wavelength, flashed on a 1000 td white background yielded spectral sensitivity curves with th...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/0042-6989(82)90142-0
更新日期:1982-01-01 00:00:00
abstract::Motion detection can be achieved either with mechanisms sensitive to a target's velocity, or sensitive to change in a target's position. Using a procedure to dissociate these two provided by Nakayama and Tyler (Vis Res 1981;21:427-433), we explored detection of first-order (luminance-based) and various second-order (t...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/s0042-6989(98)00035-2
更新日期:1998-11-01 00:00:00
abstract::Visual localization during saccadic eye movements is prone to error. Flashes shortly before and after the onset of saccades are usually perceived to shift towards the saccade target, creating a "compression" pattern. Typically, the saccade landing point coincides with a salient saccade target. We investigated whether ...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2014.04.008
更新日期:2014-07-01 00:00:00
abstract::This study examines how salience and a center bias drive infants' first fixation while looking at complex scenes. Adults are known to have a strong center bias, their first point of gaze is nearly always in the center of the scene. The center bias is likely to be a strategic bias, as looking towards the center minimiz...
journal_title:Vision research
pub_type: 杂志文章
doi:10.1016/j.visres.2018.10.003
更新日期:2019-01-01 00:00:00