Coherent global motion percepts from stochastic local motions
Douglas W. Williams,Robert Sekuler +1 more
- 01 Jan 1986
- pp 105-106
450
TL;DR: This work studied the percept with dynamic random dot kinematograms whose elements took independent, random walks of constant step size; their directions of displacement were drawn from a uniform distribution.
read more
Abstract: A percept of global, coherent motion results when many different localized motion vectors are combined. We studied the percept with dynamic random dot kinematograms whose elements took independent, random walks of constant step size; their directions of displacement were drawn from a uniform distribution. The tendency to see global, coherent flow along the mean of the uniform distribution varied with the range of the distribution. Psychometric functions were obtained with kinematograms having various step sizes and element densities. The changes in the psychometric function with step size and density are consistent with Ullman's "minimal map theory" of motion correspondence.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Neural Mechanisms Underlying the Analysis of Moving Visual Stimuli
Philip S. Ulinski
- 01 Jan 1999
TL;DR: This chapter focuses on understanding how the biophysical, synaptic, and connectional properties of neurons in visual cortex are used to effect the computations that allow animals to extract a rich picture of the external world from patterns of light moving past their eyes.
25
Visual attention.
Karla K Evans,Todd Horowitz,Piers D. L. Howe,Roccardo Pedersini,Ester Reijnen,Yair Pinto,Yoana Kuzmova,Jeremy M. Wolfe +7 more
- 01 Sep 2011
TL;DR: Visual attention limits processing to a subset of incoming stimuli, allowing for concurrent selection and inhibition. It enables the binding of selected information into unified representations of objects in the outside world.
24
The role of direction information in the perception of geometric optic flow components
Bart De Bruyn,Guy Orban +1 more
TL;DR: The results indicate that as far as they integrate motion information, detectors for divergence, curl, and shear operate in a similar manner.
Distinct cognitive mechanisms involved in the processing of single objects and object ensembles
TL;DR: The findings confirm previous neuroimaging results and suggest that distinct cognitive mechanisms may be involved in single-object and object-ensemble perception, and show that the scope of visual attention plays a critical role in determining which type of object processing (ensemble or single object) is engaged by the visual system.
Motion evoked brain potentials parallel the consistency of coherent motion perception in humans
Michael Niedeggen,Eugene R. Wist +1 more
TL;DR: The amplitude of this component was clearly reduced when local ambiguous signals could not be integrated to produce the perception of global coherent motion.
24
References
•Book
The Interpretation of Visual Motion
Shimon Ullman
- 01 Jan 1979
TL;DR: In this paper, the authors used the methodology of artificial intelligence to investigate the phenomena of visual motion perception: how the visual system constructs descriptions of the environment in terms of objects, their three-dimensional shape, and their motion through space, on the basis of the changing image that reaches the eye.
2.1K
Phenomenal coherence of moving visual patterns
TL;DR: It is reported here that coherence depends on the relative contrasts, spatial frequencies and directions of motion of the gratings, and these effects may reveal the previously unstudied properties of a higher order stage of motion analysis.
A short-range process in apparent motion
TL;DR: Perceptual segregation in an alternated pair of random-dot patterns was perceived as a segregated, coherently moving shape only if the displacement was small, while classical apparent motion with larger displacements involves a different process.
905
Rapid measurement of contrast-sensitivity functions.
Robert Sekuler,Paul Tynan +1 more
TL;DR: This rapid procedure, which resembles that used in the Bekesy sweep-frequency audiometer, has potential as a clinical tool for diagnostic assessment.
37
•Journal Article
Phenomenal coherence of moving gratings (A)
24