scispace - formally typeset
Search or ask a question

Showing papers in "Vision Research in 1997"


Journal ArticleDOI
TL;DR: These deviations from linearity provide a potential explanation for the weak forms of non-linearity observed in the response properties of cortical simple cells, and they further make predictions about the expected interactions among units in response to naturalistic stimuli.

3,840 citations


Journal ArticleDOI
TL;DR: It is shown that a new unsupervised learning algorithm based on information maximization, a nonlinear "infomax" network, when applied to an ensemble of natural scenes produces sets of visual filters that are localized and oriented.

2,354 citations


Journal ArticleDOI
TL;DR: Experts with visually similar objects, not faces per se, may produce configural sensitivity, and the recognition of parts in the Studied configuration was better than in isolation, suggesting an object advantage.

978 citations


Journal ArticleDOI
TL;DR: Microspectrophotometric examination of the retinal photoreceptors of the budgerigar, Melopsittacus undulatus (Psittaciformes) and the zebra finch and the Taeniopygia guttata (Passeriformes), demonstrate the presence of four, spectrally distinct classes of single cone that contain visual pigments absorbing maximally at about 565, 507, 430-445 and 360-380 nm.

484 citations


Journal ArticleDOI
TL;DR: The results suggest that the control of the initial eye movement during both simple and conjunction searches is through a spatially parallel process.

380 citations


Journal ArticleDOI
TL;DR: In vitro and in vivo studies suggest that the use of selective NMDA receptor antagonists or Ca2+ channel blockers should be useful in preventing or at least abating neuronal loss in the retina.

365 citations


Journal ArticleDOI
TL;DR: A simple property of natural images is proposed which explains this robustness: they are collages of regions corresponding to statistically independent " objects", from which follows scaling in natural images.

340 citations


Journal ArticleDOI
TL;DR: This paper investigates the properties of preattentive object files by borrowing and modifying terminology from Kahneman & Treisman (1984) and finding that appreciation of the overall shape of an object appears to require the binding together of local form features--a process that requires attention.

337 citations


Journal ArticleDOI
TL;DR: The results indicated that the visual information that is retained across successive fixations depends on moment by moment task demands, consistent with previous suggestions that visual representations are limited and task dependent.

277 citations


Journal ArticleDOI
TL;DR: The slope of the RCS was found to provide a reasonable prediction of physical blur across a variety of scenes in spite of the variability in their amplitude spectra, and was also found to produce a good prediction of perceived blur as judged by human subjects.

262 citations


Journal ArticleDOI
TL;DR: As V4 provides the major input to IT, global concentric units may play an important role in analyzing complex images such as faces and deficits in the perception of concentric Glass patterns have recently been linked to prosopagnosia.

Journal ArticleDOI
TL;DR: It is concluded that impairment of the dopamine system during retinal degenerations could give rise to many of the visual abnormalities observed and appears to be central to the visual defects seen.

Journal ArticleDOI
TL;DR: Eye-movement recordings showed that longer reading times at low contrast are partitioned about equally between prolonged fixation times and an increased number of saccades (presumably related to a reduced visual span).

Journal ArticleDOI
TL;DR: Data suggest that in some cases with visual variants of Alzheimer's disease, the neurological symptomatology may be related to the loss of certain components of the cortical visual pathways, as reflected by the particular distribution of the neuropathological markers of the disease.

Journal ArticleDOI
TL;DR: Improvement through training in vernier acuity under different feedback conditions is compared to clarify the role of feedback during learning of a perceptual task and to test different (neural network) models of perceptual learning.

Journal ArticleDOI
TL;DR: A two-stage model (von Kries scaling followed by decorrelation) is used to show how the appearance of colors may be altered by light adaptation to the mean of the distributions and by contrast adaptation toThe contrast range and principal axes of the distribution.

Journal ArticleDOI
TL;DR: It is proposed that lens-induced refractive errors are compensated by similar retinal mechanisms as the ones proposed by Bartmann and Schaeffel [(1994].

Journal ArticleDOI
TL;DR: It is shown that if the neuron can be modeled as a spatiotemporal linear filter followed by a static nonlinearity, the cross-correlation between the input image sequence and the cell's spike train output gives the projection of the receptive field onto the subspace spanned by S.

Journal ArticleDOI
TL;DR: It is concluded that spatial resolution factors affect visual search findings that have hitherto been attributed to covert attention, and stresses the importance of analyzing data by target position to minimize the confound of the set size effect and retinal/field eccentricity.

Journal ArticleDOI
TL;DR: This paper examines how observers estimate the overall orientation of spatially disorganised textures containing variable orientation and indicates that average orientation is assigned to the centroid of a set of orientation measures.

Journal ArticleDOI
TL;DR: In this paper, the authors measured natural time series of intensities were measured, as well as the responses of blowfly photoreceptors and large monopolar cells (LMCs) to these time series.

Journal ArticleDOI
TL;DR: Eye and head movements were measured in a group of infants at 2, 3, and 5 months of age as they were attentively tracking an object moving at 0.2 or 0.4 Hz in sinus or triangular mode.

Journal ArticleDOI
TL;DR: In this article, partial coherence interferometry was used to estimate the effect of cycloplegia on the ocular components of the anterior eye segment, and to further improve the precision to 1-2 microns by the use of these agents.

Journal ArticleDOI
TL;DR: The results suggest that contributions to the VEP from the M pathway precede those from the P pathway, and that the ratio of P/M contributions decreases with eccentricity.

Journal ArticleDOI
TL;DR: The study of eye movements in HD has led to a fruitful interaction between basic science and clinical investigation, and has served as a paradigm for examining higher-level defects in saccadic eye movement control in patients with various degenerative, neurological diseases or with focal cerebral hemispheral lesions.

Journal ArticleDOI
TL;DR: It is concluded that change in ocular torsional position alone changes the perceived orientation of a visual line, and settings of avisual line cannot be used to infer perceived postural orientation directly.

Journal ArticleDOI
TL;DR: The model can be extended to a much more general class of receptive field profiles than the commonly used Gabor functions, and the computed disparity maps for random dot stereograms with the new algorithm are very similar to human perception, with sharp transitions at disparity boundaries.

Journal ArticleDOI
TL;DR: Neuronal responses to static and moving texture patterns were investigated in the striate cortex of anaesthetized and paralysed adults cats and responded more strongly to the patterns displaying feature contrast than to the uniform patterns.

Journal ArticleDOI
TL;DR: The line-motion illusion is used to investigate the optimal cue properties that evoke visual attention and suggests that cues that preferentially excite the M pathway predominantly capture visual attention.

Journal ArticleDOI
TL;DR: Evidence of cortical activity in alert, trained monkeys that is clearly representing visual stimulation, yet is not perceived is presented, calling into question explanations of perceptual phenomena that invoke a low temporal frequency cut-off of CO cells in V1 to account for the failure to perceive fast temporal changes in the chromatic domain.