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terça-feira, 15 de março de 2011

Priberam Machine Learning Lunch Seminars




Priberam Machine Learning Lunch Seminar
Speaker: Jorge Marques (ISR)
Venue: IST Alameda, Sala EA3 (Torre Norte)
Date: Tuesday, March 15th, 2011
Time: 13:00
Lunch will be provided

Title: Project ARGUS: Characterizing People Activities Using Multiple Motion Fields

Abstract:

Surveillance systems aim to characterize human activities and to
detect abnormal behaviors. This task is specially challenging if the
camera field of view is wide and the objects are far from the camera.
In such operating conditions, it is not possible to extract detailed
descriptions of the objects such as shape and color. In this case,
most of the information is conveyed by the object trajectory and
motion parameters. We therefore need to characterize trajectories and
to be able to discriminate normal from abnormal behaviors.
This talk presents a new representation for human activity analysis
based on multiple motion fields, equipped with space-varying switching
mechanisms. We will show that this description is flexible and
intuitive. The model parameters have a meaning and they can be used to
understand how people behave in a scene. Parameter estimation will be
addressed using the EM method and several extensions will be
discussed.

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Bio: Jorge Marques received the Ph.D degree and Aggregation title in
Electrical and Computer Engineering from IST. He is currently with the
department of Electrical and Computer Engineering, IST, where he is
Associate Professor. His research interests are in the area of Image Processing and Pattern Recognition.

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