Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 105, Issue 38, Pages 14298-14303Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0800968105
Keywords
computer vision; object recognition; parts interpretation; cortical hierarchy; feedback processing
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Funding
- Information Society Technology [FP6-2005-015803]
- Israel Science Foundation [7-0369]
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The human visual system recognizes objects and their constituent parts rapidly and with high accuracy. Standard models of recognition by the visual cortex use feed-forward processing, in which an object's parts are detected before the complete object. However, parts are often ambiguous on their own and require the prior detection and localization of the entire object. We show how a cortical-like hierarchy obtains recognition and localization of objects and parts at multiple levels nearly simultaneously by a single feed-forward sweep from low to high levels of the hierarchy, followed by a feedback sweep from high- to low-level areas.
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