lec02-3 - Object Recognition The Recognition-by-Components...

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Object Recognition The Recognition-by-Components Theory Psychology 355: Cognitive Psychology Winter Quarter 2009 1/14/2009
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P 355, Miyamoto, Winter '09 2 Outline • Last time – evidence favoring a feature analysis approach over a template approach. • TODAY: Higher level visual representations in object perception. Biederman's Recognition-by-Components (RBC) Theory • TOMORROW: Perceptual learning of patterns Neural specialization for language, face and place perception • SECTION: Gestalt principles of form perception Next: Overview Slide
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P 355, Miyamoto, Winter '09 3 Overview • We are working up from lower-levels to higher-levels of visual representation. •Perception of open environments •Perception of static scenes (pictures) •Perception of perceptual dimension (depth, brightness) •Elementary percepts (yes/no detection; motion in noise) •Receptor and early visual cortext activity Higher Level Representations . . . . . . . . . Lower Level Representations Next: RBC Theory - Geons
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P 355, Miyamoto, Winter '09 4 Biederman's Recognition-by-Components (RBC) Theory of Object Recognition • Geons ("geometric ions") o Biederman, I. (1987). Recognition-by-Components: A Theory of Human Image Understanding. Psychological Review, 94, 115-147. If you want to know more about this theory, download this article (completely optional). To do this, it is easiest to use a UW library computer. If you need help with the download, a librarian can help you. • A geon is a visual pattern that typically indicates a part of an object. Next: Partial List of Geons
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P 355, Miyamoto, Winter '09 5 Biederman (1987), pp. 122: Partial list of "geons" (elementary shapes that the visual system is proposed to detect during object and scene recognition) • You can think of features and geons as part of a hierarchy: Atom ~ Feature Molecule ~ Geon Next: Non-Accidental Differences Between a Brick & a Cylinder
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P 355, Miyamoto, Winter '09 6 Biederman (1987), pp. 121.
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This note was uploaded on 10/05/2009 for the course PSYCH 355 taught by Professor Miyamoto during the Winter '08 term at University of Washington.

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lec02-3 - Object Recognition The Recognition-by-Components...

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