REMINDER - Today's Talk - David Jacobs - Associate Professor -CSIC Building, Room 1115 at 4:00pm - Article 69 - go-pugleaf

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REMINDER - Today's Talk - David Jacobs - Associate Professor -CSIC Building, Room 1115 at 4:00pm

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From: "Findlay, Adelaide"
Date: Mon, 20 Oct 2008 13:41

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Department of Computer Science

David Jacobs, Associate Professor will be giving a talk today
Monday,October 20, 2008 - CSIC Building - Room 1115 at 4:00pm 
Reception will be held at the CSIC Lobby before the talk at 3:30 p.m.
Title and Abstract are below:



Title: Matching Images with Deformations

Abstract: 
When we match images that come from the same object, we must often allow
for 2D, non-linear deformations.  These can model changes in shape that
can occur when an object deforms or an articulated object moves its
parts, differences in shape between different instances of the same type
of object, or variations in apparent shape due to changes in viewpoint.
This talk will provide an overview of several approaches to matching
that stress finding problem formulations that yield computationally
efficient algorithms. I will describe a novel image descriptor that is
invariant to deformations, and a shape descriptor that is invariant to
articulations. We use this shape matching algorithm in a hand-held
device for computer assisted plant species identification.  I will then
show that the cost returned by a stereo matching algorithm can be used
for image matching when there deformation due to pose variation.  We use
this to construct a face recognition algorithm that compares 2D gallery
and probe images taken from different viewpoints.  This algorithm
outperforms all prior work on the CMU PIE data set for face recognition
with pose variation. Finally, I will present an approximation algorithm
for computing the Earth Mover's Distance (EMD), a metric for comparing
probability distributions that can be used to match image descriptors,
accounting for deformations.  Using a wavelet-based representation, we
construct an accurate, linear time algorithm for computing the EMD.

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From: adelaide@cs.umd.edu ("Findlay, Adelaide")
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Subject: REMINDER - Today's Talk - David Jacobs - Associate Professor -CSIC Building, Room 1115 at 4:00pm
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