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אירועים

אירועים

Pixel Club: Hierarchical Invariant Sparse Modeling for Image Analysis
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לאה בר (אונ' מינסוטה)
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יום שלישי, 21.2.2012, 11:30
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חדר 1061, בניין מאייר, הפקולטה להנדסת חשמל
Sparse representation theory has been increasingly used in signal processing and machine learning. In this work we introduce a hierarchical sparse modeling approach which integrates information from the image patch level to derive a mid-level invariant image and pattern representation. The proposed framework is based on a hierarchical architecture of dictionary learning for sparse coding in a cortical (log-polar) space, combined with a novel pooling operator which incorporates the Rapid transform and max pooling to attain rotation and scale invariance. The invariant sparse representation of patterns here presented- can be used in different object recognition tasks. Promising results are obtained for three applications -- 2D shapes classification, texture recognition and object detection.

joint work with Guillermo Sapiro, University of Minnesota.
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