[Brown CS Talks] Brown CS Colloquium: Andrew Fitzgibbon in Lubrano on 9/26/02 at 4 pm

[talks@list.cs.brown.edu]

			   BROWN UNIVERSITY

		     COMPUTER SCIENCE COLLOQUIUM

				
			       presents

			  Andrew Fitzgibbon
			     
	       Royal Society University Research Fellow
	      W.W. Spooner Research Fellow, New College
			 University of Oxford

		 
		 Thursday, September 26, 2002 at 4 pm
	       Lubrano Conference Room (CIT 4th floor)
		Refreshments will be served at 3:45 pm
			      

      Through the Looking Glass: Vision and graphics in complex
light-transport environments (Plus: Fast and accurate gesture
recognition) 

			       
			       Abstract

I'll discuss the class of images generated in an environment
containing ``optically active elements'' -- for example a magnifying
glass, a transparent vase or distortion in the camera lens.
Traditionally, if a computer graphics system is required to render an
image containing such an element, complex calibration of the shape and
optical properties is the only way to capture a real object.

I'll describe some new techniques for recovering these complex
light-transport properties from images of natural scenes, which do not
depend on any special scene structure and require no precalibration of
the sequence.  One is an extension of multiple-view pinhole camera
geometry to new distortion models, the other is a remarkably simple
but effective technique for estimation of a quite general class of
light transports.

I'll also run a showreel of our extremely fast and accurate gesture
recognition system, used in a vision-only replacement for the keyboard
and mouse.

http://www.robots.ox.ac.uk/~awf (with Zisserman, Wexler, Lockton)



		    Host: Professor Michael Black