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Date: Tue, 8 Nov 2005 23:14:35 -0800
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Hi,
next _Thursday_ November 17, we will continue our series of talks with a
presentation by:
Nicolas Gehrig, Communications and Signal Processing Group, Electrical and
Electronic Engineering Department, Imperial College London, currently
visiting scholar at U.C. Berkeley.
He will give us an overview of his current research on:
"Distributed compression of multi-view images for camera sensor networks"
Abstract:
We address the problem of distributed compression of multi-view images in
camera sensor networks. We assume that numbers of cheap low-power wireless
sensors are deployed in order to visually acquire a scene of interest from
different viewing positions, and transmit their data to some central
receiver. Due to the spatial proximity of the different cameras, the
acquired images can be highly dependent. In order to reduce the total amount
of data transmission, image compression should be applied locally at the
sensors.
The main challenge in this compression problem is that the different sensors
have to exploit the correlation in the visual information without being
allowed to communicate between themselves. The correlation in the visual
information retrieved is related to the structure of the plenoptic function,
and can be estimated using geometrical information such as the position of
the cameras and some bounds on the location of the objects. We propose a
distributed compression scheme that takes advantage of this geometrical
information in order to reduce the overall transmission rate from the
sensors to a common central receiver.
Bio:
Nicolas is currently working as a visiting scholar in the BASiCS research
group with Prof. Kannan Ramchandran, EECS Department, UC Berkeley. Since
October 2003, he has been working as a research assistant and PhD student in
the Signal Processing and Communications group, EEE Department, Imperial
College London, U.K., under the supervision of Dr. Pier Luigi Dragotti. In
March 2003, he graduated from EPFL, Lausanne, Switzerland, where he obtained
a master degree in Communication Systems. From September 2002 to May 2003,
he worked at Dartfish S.A., Fribourg, Switzerland. During that time, he
carried out his master thesis on "Video-based golf swing tracking". Between
April and October 2001, he interned as a software engineer at IBM T.J.
Watson Research Center, Hawthorne, NY, where he worked on the development of
a PCI adapter to handle MPEG-2 transport streams.
Like last time, the talk will take place at Jacques' company:
Catalytica Energy Systems, Inc.
Building 4
430 Ferguson Drive
Mountain View, CA-94043
See http://www.catalyticaenergy.com/contact_us/mountain_view.html
but please come to Building 4 (and not 3 as mentioned on the website)
We will start at 7pm with some networking time, followed by Nicolas
presentation.
After the presentation we will meet at the Tied House
http://www.tiedhouse.com/ for some food and drinks.
Please RSVP before Monday night so we can make sure there are enough chairs
in the conference room.
I hope we'll see many of you at this event!
Eric
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Received on Wed Nov 09 2005 - 09:59:43 PST
