Kinetic depth effect and optic flow--I. 3D shape from Fourier motion.

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：:We have examined the ability of observers to parse bimodal local-motion distributions into two global motion surfaces, either overlapping (yielding transparent motion) or spatially segregated (yielding a motion boundary). The stimuli were random dot kinematograms in which the direction of motion of each dot was drawn ...

journal_title：Vision research

authors： Smith AT,Curran W,Braddick OJ

更新日期：1999-03-01 00:00:00

abstract：:Two general approaches to the visual control of action have emerged in last few decades, known as the on-line and model-based approaches. The key difference between them is whether action is controlled by current visual information or on the basis of an internal world model. In this paper, we evaluate three hypotheses...

journal_title：Vision research

authors： Zhao H,Warren WH

更新日期：2015-05-01 00:00:00

abstract：:Presentation of different images to the two eyes normally results in a time-varying alternation between the two images (binocular rivalry). However, we find that when orthogonal gratings are viewed dichoptically at low contrast, a stable summation between the two images is perceived in the form of a dichoptic plaid. T...

journal_title：Vision research

authors： Liu L,Tyler CW,Schor CM

更新日期：1992-08-01 00:00:00

abstract：:Previous research has shown that cognitive and motor visual systems have separate maps of visual space because spatial values in them can be manipulated independently. Here we ask whether the motor map in turn can be divided into separate representations of space. Forty large saccadic eye movements in darkness resulte...

journal_title：Vision research

authors： Nemire K,Bridgeman B

更新日期：1987-01-01 00:00:00

abstract：:Traditional perceptual learning protocols rely almost exclusively on long periods of uninterrupted fixation. Taking a first step towards understanding perceptual learning in natural vision, we had observers report the orientation of a briefly flashed stimulus (clockwise or counterclockwise from a reference orientation...

journal_title：Vision research

authors： Rolfs M,Murray-Smith N,Carrasco M

更新日期：2018-11-01 00:00:00

abstract：:Although color-opponent neurons appear to subserve color vision, precisely how these cells encode hue is still not clear. Single-unit, extracellular recordings from the rainbow trout optic tectum were made in order to examine the possible role of action potential timing in coding chromatic stimuli. We found that color...

journal_title：Vision research

authors： McDonald CG,Hawryshyn CW

更新日期：1999-08-01 00:00:00

abstract：:Static firing frequencies have been determined in extraocular motoneuronal discharge patterns for different eye positions within +/- 30 deg around the primary position. From these data iso-frequency curves were plotted stating all possible eye positions for a given firing rate. Such curves have been constructed for th...

journal_title：Vision research

authors： Hepp K,Henn V

更新日期：1985-01-01 00:00:00

abstract：:When a vernier stimulus is presented for a short time and followed by a grating comprising five straight lines, the vernier remains invisible but may bequeath its offset to the grating (feature inheritance). For more than seven grating elements, the vernier is rendered visible as a shine-through element. However, shin...

journal_title：Vision research

authors： Herzog MH,Fahle M,Koch C

更新日期：2001-08-01 00:00:00

abstract：:Interocular transfer of a spatial frequency shift was obtained with equiluminous color gratings. Gratings which combined both color and luminance contrast yielded small aftereffects and no interocular transfer. Recent electrophysiological work has uncovered color-sensitive binocularly driven cells in visual cortex. Th...

journal_title：Vision research

authors： Favreau OE,Cavanagh P

更新日期：1983-01-01 00:00:00

abstract：:The present study provides new clues about visual processes underlying the human pupillary responses evoked by achromatic spatial patterns. The pupillary responses can be modeled as a combination of two processes, a temporally transient process which saturates with increasing contrast and a temporally sustained proces...

journal_title：Vision research

authors： Young RS,Kennish J

更新日期：1993-11-01 00:00:00

abstract：:While saccadic eye movements produce rapid shift of images of objects on the retina, the visual world is perceived as stationary (visual stability), but the precise mechanisms involved in such perception remain unclear. We investigated if visual stimuli existing before and/or after a saccade serve to preserve visual s...

journal_title：Vision research

authors： Honda H

更新日期：2006-10-01 00:00:00

abstract：:A novel type of dynamic random-dot stereogram (DRS) was used to study vergence movements and depth detection in response to temporal modulations of interocular correlation. Each DRS consisted of the repeated presentation of a pair of correlated images alternated by the presentation of a pair of uncorrelated images. Th...

journal_title：Vision research

authors： Erkelens CJ

更新日期：2001-01-01 00:00:00

abstract：:Two-frame random-element kinematograms were used to study the matching algorithm employed by the visual system to keep track of moving elements. Previous data have shown that the maximum spatial displacement detectable (dmax) for random-dot kinematogram stimuli increases both with increasing dot size and with decreasi...

journal_title：Vision research

authors： Eagle RA,Rogers BJ

更新日期：1996-02-01 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

authors： Nelson RC,Selinger A

更新日期：1998-08-01 00:00:00

abstract：:There is evidence that humans implicitly learn an average or prototype of previously studied faces, as the unseen face prototype is falsely recognized as having been learned (Solso & McCarthy, 1981). Here we investigated the extent and nature of face prototype formation where observers' memory was tested after they st...

journal_title：Vision research

authors： Or CC,Wilson HR

更新日期：2013-04-19 00:00:00

abstract：:Saccadic eye movements are strongly influenced by shifts of attention to non-target objects. In contrast, we have shown previously that the initiation of smooth pursuit eye movements is relatively unaffected when attention is shifted to objects that are either stationary or move in the same direction as the pursuit ta...

journal_title：Vision research

authors： Souto D,Kerzel D

更新日期：2011-01-01 00:00:00

abstract：:Three normal observers made visual matches from 0.03 to 100 td on a 10 degree central field at 445, 560 and 630 nm, using two different methods: heterochromatic flicker photometry and direct comparison brightness matching. In a relative sensitivity vs illuminance plot, the brightness matches underwent smooth changes, ...

journal_title：Vision research

authors： Vienot F,Chiron A

更新日期：1992-03-01 00:00:00

abstract：:Three experiments investigated whether and to what extent increases in age affect the functionality of stereopsis. The observers' ages ranged from 18 to 83 years. The overall goal was to challenge the older stereoscopic visual system by utilizing high magnitudes of binocular disparity, ambiguous binocular disparity [c...

journal_title：Vision research

authors： Norman JF,Norman HF,Craft AE,Walton CL,Bartholomew AN,Burton CL,Wiesemann EY,Crabtree CE

更新日期：2008-10-01 00:00:00

abstract：:We describe a technique, involving the projection of low power laser beams through excised lenses in solution, that makes it possible to measure photographically lens optical aberrations. Preliminary work indicates that the laser method can be used in combination with lens culture experiments as a means of monitoring ...

journal_title：Vision research

authors： Sivak JG,Gershon D,Dovrat A,Weerheim J

更新日期：1986-01-01 00:00:00

abstract：:Trout lens external shape and internal refractive index gradient structure were measured and used to construct an optical lens model that predicts by ray tracing the average longitudinal spherical and chromatic aberration, focal length and image quality. The nearly spherical shape of the lens was measured from photogr...

journal_title：Vision research

authors： Jagger WS,Sands PJ

更新日期：1996-09-01 00:00:00

abstract：:Many visual attributes of a target stimulus are computed according to dynamic, non-retinotopic reference frames. For example, the motion trajectory of a reflector on a bicycle wheel is perceived as orbital, even though it is in fact cycloidal in retinal, as well as spatial coordinates. We cannot perceive the cycloidal...

journal_title：Vision research

authors： Noory B,Herzog MH,Ogmen H

更新日期：2015-08-01 00:00:00

abstract：:It is commonly believed that objects viewed in certain contexts may be more or less salient. Measurements of salience have usually relied on asking observers "How much does this object stand out against the background?". In this study, we measured the salience of objects by assessing the distraction they produce for s...

journal_title：Vision research

authors： Huang L,Pashler H

更新日期：2005-06-01 00:00:00

abstract：:Three experiments of visual search for a cube (for a square pillar in Experiment 3) with an odd conjunction of orientation of faces and color (a cube with a red top face and a green right face among cubes with a green top face and a red right face, for example) showed that the search is made more efficient by arrangin...

journal_title：Vision research

authors： Morita H,Kumada T

更新日期：2003-08-01 00:00:00

abstract：:We present a model for recovering the direction of heading of an observer who is moving relative to a scene that may contain self-moving objects. The model builds upon an algorithm proposed by Rieger and Lawton, based on earlier work by Longuet-Higgins and Prazdny. The algorithm uses velocity differences computed in r...

journal_title：Vision research

authors： Hildreth EC

更新日期：1992-06-01 00:00:00

abstract：:Neural mechanisms underlying the initiation of saccadic eye movements were studied by recording the activity of neurons in the superior colliculus of rhesus monkeys that had extensive experience on the gap task using targets restricted to one visual field. The superposition of visual activation upon the increased exci...

journal_title：Vision research

authors： Sparks D,Rohrer WH,Zhang Y

更新日期：2000-01-01 00:00:00

abstract：:Current concepts of action and perception emphasise a dissociation between conscious visual recognition and visual action control. These models do not expect an effect of the recognisable identity of an object on the kinematic parameterisation of grasping movements under binocular viewing conditions without pre-test l...

journal_title：Vision research

authors： Borchers S,Himmelbach M

更新日期：2012-08-15 00:00:00

abstract：:We are quantifying the distribution of photoreceptors and ganglion cells in human retina with the goal of establishing a reliable anatomical database which may be compared to information about visual function. We required a representation of retinal cell distributions which facilitated collection, analysis, and displa...

journal_title：Vision research

authors： Curcio CA,Sloan KR,Meyers D

更新日期：1989-01-01 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

authors： Jacobs GH,Neitz J,Crognale M

更新日期：1987-01-01 00:00:00

abstract：:We investigated temporal summation of the rods in a complete achromat, who lacks cone vision. Critical duration (tc) was estimated both at the achromat's preferred area of fixation and at an area 12 deg laterally in the nasal visual field. Comparable tc determinations were made in a normal trichromat. At background lu...

journal_title：Vision research

authors： Sharpe LT,Fach C,Nordby K

更新日期：1988-01-01 00:00:00