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GRASP Seminar: Carlo Tomasi, Duke University, “Level Set Curve Particles”

April 13, 2007 @ 12:00 pm - 1:00 pm

Abstract: In many applications it is necessary to track a moving and deforming boundary on the plane from infrequent, sparse measurements. For instance, each of a set of mobile observers may be able to tell the position of a point on the boundary. Often boundary components split, merge, appear, and disappear over time. Data are typically sparse and noisy and the underlying dynamics is uncertain. To address these issues, we use a particle filter to represent a distribution in the large space of all plane curves and propose a full-fledged combination of level sets and particle filters. Our main contribution is in controlling the potentially high expense of multiplying the cost of a level set representation of boundaries by the number of particles needed. Initial experiments show the promise of the approach.


Carlo Tomasi is a Professor of Computer Science at Duke University. He received his undergraduate degree in Electrical Engineering from the University of Padua in 1981, his Masters in Electrical and Computer Engineering from the University of Massachusetts at Amherst in 1984, a doctorate from the University of Padua in 1987, and his Ph.D. from Carnegie-Mellon University in 1991. His research interests include computer vision, medical imaging, and applied mathematics.


April 13, 2007
12:00 pm - 1:00 pm
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