Psych pwpt 7 - Theories of Object Recognition Theories of...

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Theories of Object Recognition
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Theories of object recognition How do we go from perception of form to perception of particular objects? Notice how they emphasize or imply bottom-up processing Low-level information used to build up shapes for object recognition
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Template matching theories Match forms against templates stored in memory When match is found, object is recognized B B Template Image Match! K Image B Template Mismatch!
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Template matching theories Problems There is huge variability in the objects that we recognize Would need MANY templates for each object – changes in orientation, size, etc. It would be easy to confuse similar objects. B Template B B B B B B B B B B B B B
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Feature detection theories Objects are comprised of distinct parts (features ) Doesn’t require indefinite number of stored templates Features for the letter “A” Left-slanted line Right-slanted line Horizontal line Objects of the same type should have the same basic features Can handle the variability problem
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Feature detection theories Recognition involves analyzing an object into its features, and then matching them against representations stored in memory Analyze perceived form Match features in memory
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This note was uploaded on 02/10/2011 for the course PSYC 250 taught by Professor Timothymiura during the Spring '11 term at Loyola Chicago.

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Psych pwpt 7 - Theories of Object Recognition Theories of...

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