Journal ArticleDOI
Human factors and behavioral science: Textons, the fundamental elements in preattentive vision and perception of textures
Bela Julesz,J. R. Bergen +1 more
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TLDR
Preattentive vision serves as an “early warning system” by pointing out those loci of texton differences that should be attended to, according to this theory, at any given instant the visual information intake is relatively modest.Abstract:
Recent research in texture discrimination has revealed the existence of a separate “preattentive visual system” that cannot process complex forms, yet can, almost instantaneously, without effort or scrutiny, detect differences in a few local conspicuous features, regardless of where they occur. These features, called “textons”, are elongated blobs (e.g., rectangles, ellipses, or line segments) with specific properties, including color, angular orientation, width, length, binocular and movement disparity, and flicker rate. The ends-of-lines (terminators) and crossings of line segments are also textons. Only differences in the textons or in their density (or number) can be preattentively detected while the positional relationship between neighboring textons passes unnoticed. This kind of positional information is the essence of form perception, and can be extracted only by a time-consuming and spatially restricted process that we call “focal attention”. The aperture of focal attention can be very narrow, even restricted to a minute portion of the fovea, and shifting its locus requires about 50 ms. Thus preattentive vision serves as an “early warning system” by pointing out those loci of texton differences that should be attended to. According to this theory, at any given instant the visual information intake is relatively modest.read more
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Book ChapterDOI
Shifts in selective visual attention: towards the underlying neural circuitry.
Christof Koch,Shimon Ullman +1 more
TL;DR: This study addresses the question of how simple networks of neuron-like elements can account for a variety of phenomena associated with this shift of selective visual attention and suggests a possible role for the extensive back-projection from the visual cortex to the LGN.
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Guided Search 2.0 A revised model of visual search
Jeremy M. Wolfe,Jeremy M. Wolfe +1 more
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Involuntary covert orienting is contingent on attentional control settings.
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Unsupervised texture segmentation using Gabor filters
Anil K. Jain,Farshid Farrokhnia +1 more
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Feature analysis in early vision : evidence from search asymmetries
Anne Treisman,Stephen Gormican +1 more
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References
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Journal ArticleDOI
A feature-integration theory of attention
Anne Treisman,Garry A. Gelade +1 more
TL;DR: A new hypothesis about the role of focused attention is proposed, which offers a new set of criteria for distinguishing separable from integral features and a new rationale for predicting which tasks will show attention limits and which will not.
Journal ArticleDOI
Receptive fields and functional architecture of monkey striate cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: The striate cortex was studied in lightly anaesthetized macaque and spider monkeys by recording extracellularly from single units and stimulating the retinas with spots or patterns of light, with response properties very similar to those previously described in the cat.
Book
Foundations of Cyclopean Perception
TL;DR: Foundations of Cyclopean Perception as mentioned in this paper is a classic work on cyclopean perception that has influenced a generation of vision researchers, cognitive scientists, and neuroscientists and has inspired artists, designers, and computer graphics pioneers.
Journal ArticleDOI
Textons, the elements of texture perception, and their interactions
TL;DR: Research with texture pairs having identical second-order statistics has revealed that the pre-attentive texture discrimination system cannot globally process third- and higher- order statistics, and that discrimination is the result of a few local conspicuous features, called textons.