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University of Colorado at Boulder
Department of Computer Science
ECOT 717 Engineering Center
Campus Box 430
Boulder, Colorado 803090430
(303) 4927514, FAX: (303) 4922844

CS COLLOQUIUM
Stereo Vision for Telepresence:  Methods and Metrics
Jane Mulligan
University of Pennsylvania
May 9, 2001
11:00-12:00 AM
Engineering Center Classroom 245

Advances in network speed and bandwidth have created opportunities for 
previously unrealizable Computer Vision and Graphics applications such as 
Networked Augmented Reality and Telepresence. Making these applications a 
reality requires real-time environment sensing to acquire compelling scene 
models for rendering and user interaction at remote locations. Computer 
Vision techniques have recently been embraced by the Graphics community as 
a means of acquiring such large-scale, realistic world models. For online 
multi-media applications such as Tele-Immersion, we are concerned with the 
`immersive feeling' of the rendered models, including the quality of depth 
points in terms of accuracy and absence of outliers, and the responsiveness 
of the system necessary for communication and interaction among users. 
Challenges for a real-time stereo system which must deliver this level of 
environment scanning include trade-offs for quality versus disparity 
search, and prediction and modeling of an unstructured environment. 
Further, for systems requiring high network bandwidth, representations must 
take into account application based network exploitation and quality of 
service.

I will describe a stereo vision system I developed for a working prototype 
tele-immersion system including novel algorithms, and an extensive dataset 
of calibrated trinocular stereo images and corresponding laser range scans 
(which act as ground truth) being used to evaluate stereo reconstructions 
for immersive environments.

Host:  Mike Mozer
------------------------------
http://www.cs.colorado.edu/department/events/colloquia/colloquia.html

Sign Language Interpreters Available Upon Request.  Please contact Jane 
Obrecht, Department of
Computer Science, Engineering  ECOT 722, 303-492-6101, at least five days 
prior to the colloquium.

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