Global shape processing involves feature-selective and feature-agnostic coding mechanisms

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Global shape processing involves feature-selective and feature-agnostic coding mechanisms.

Recent research and modeling proposes that a closed shape is accurately described by both the curvature and angular location of its parts relative to the shape center, implying that the shape is coded along with its overall orientation. We tested this proposition. Radial frequency (RF) patterns were employed as stimuli as they can represent a range of familiar closed shapes and are processed gl...

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Qualitative shape descriptions are important in a number of fields in AI, such as in qualitative reasoning, and especially in robotics and vision. Current approaches are confined to describing local features while walking along the shapes’ boundaries. Shapes exist, however, which cannot be distinguished by these methods even though there are obvious distinctions between them. We shall introduce...

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Global shape processing involves a hierarchy of integration stages

Radial Frequency (RF) patterns can be used to study the processing of familiar shapes, e.g. triangles and squares. Opinion is divided over whether the mechanisms that detect these shapes integrate local orientation and position information directly, or whether local orientations and positions are first combined to represent extended features, such as curves, and that it is local curvatures that...

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ژورنال

عنوان ژورنال: Journal of Vision

سال: 2014

ISSN: 1534-7362

DOI: 10.1167/14.11.12