[Colloquium] Reminder: Show and Tell Series Tomorrow (3/1) @ 12:15pm

[Katherine Cumming]

TTI-C SHOW AND TELL SERIES TALK
 
 
 
 
Speaker: Cristian Sminchisescu, TTI-C
Speaker's home page: http://www.tti-c.org//sminchisescu.html
 
Time: Tuesday, March 1st 
Location: TTI-C Conference Room
Lunch/Refreshments Provided @ 12:00pm 
Seminar @ 12:15pm
 
Title: Learning to Reconstruct 3D Human Motion from Bayesian Mixture of
Experts. A Probabilistic Discriminative Approach
 
 
 
Abstract: I will describe a density propagation algorithm to estimate 3D
humanmotion in monocular video sequences based on observations encoding
the appearance of image silhouettes. This approach is discriminative
rather than generative, therefore it does not require the probabilistic
inversion 
of a predictive observation model. Instead, it uses a human motion
capture data-base and a 3D computer graphics human model to synthesize
training pairs of typical human configurations, together with their
realistically rendered 2D silhouettes. These are used to directly learn
the conditional state distributions required for 3D body pose
reconstruction and avoid using the 3D model for inference.  
 
I will discuss the assumptions and derive the density propagation rules
for discriminative inference in continuous, temporal chain models and
propose flexible representations for learning multimodal conditional
state distributions, based on compact Bayesian mixture of experts. I
will present empirical results on real and motion capture-based test
sequences, including comparisons against nearest-neighbor and regression
methods.
 
A general presentation and results can be found at:
 
http://www.cs.toronto.edu/~crismin/discriminative_human_tracking.html
 
 
 
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If you have questions, or would like to meet the speaker, please contact
Katherine at 4-1994 or kcumming at tti-c.org.  For information on future
TTI-C talks or events, please go to the TTI-C Events page:
http://www.tti-c.org/events.html
 
 
 
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