[Brown CS Talks] Brown CS Seminar: Thomas Funkhouser in Lubrano on 9/12/02 at noon.

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Please note: The time has been changed.

			      CS Seminar
		  
		  The Department of Computer Science
			   BROWN UNIVERSITY

			      
			       presents

			  Thomas Funkhouser
		       
			 Princeton University
				 
		 Thursday, September 12, 2002 at noon

	       Lubrano Conference Room (CIT 4th floor)

	       Refreshments will be served at 11:45 am
	       

		   Shape-Based Search for 3D Models

As the number of 3D models available on the Web grows, there is an
increasing need for a search engine to help people find them (e.g., a
Google for 3D models).  Unfortunately, traditional text-based search
techniques are not always effective for 3D data.  In this talk, we
investigate new shape-based search methods.  A key challenge is to
find a computational representation of shape (a ``shape descriptor'')
that is concise, robust, quick to compute, efficient to match, and
discriminating between similar and dissimilar shapes.  In this talk, I
will describe shape descriptors designed for computer graphics models
commonly found on the Web (i.e., they may contain arbitrary
degeneracies and alignments).  We have experimented with them in a
Web-based search engine that allows users to query for 3D models based
on similarities to 3D sketches, 3D models, 2D sketches, and/or text
keywords.  We find our best shape descriptors provide better
precision-recall performance than related 3D shape matching methods
and are fast enough to find satisfy queries in under a second.  You
can try them out at: http://shape.cs.princeton.edu.

Joint work with Patrick Min, Michael Kazhdan, Joyce Chen, Alex
Halderman, David Dobkin, and David Jacobs.


		     Host: Professor John Hughesr