[Colloquium] REMINDER: Claudio Silva Talk Today

[Katie Casey]

DEPARTMENT OF COMPUTER SCIENCE

UNIVERSITY OF CHICAGO

Date: Thursday, April 8, 2010
Time: 2:30 p.m.
Place: Ryerson 251, 1100 E. 58th Street

----------------------------------------------------------

Speaker:	Claudio Silva

From:		University of Utah

Web page:	http://www.cs.utah.edu/~csilva

Title: Geometry and Topology for Quadrilateral Mesh Processing and Verifiable Visualization

Abstract: We will present two applications of geometric and topological techniques to graphics and visualization.

1) Despite the growing importance of visualization in the scientific computing process, there is no commonly accepted framework for verifying the accuracy, reliability, and robustness of visualization tools.  We advocate for creating a focus area of visualization research that we tentatively call “verifiable visualizations” that will consider both the errors of the individual visualization component within the scientific pipeline.  We present concrete examples of this idea in the context of verifying the correctness of isosurfacing techniques. In particular, we present a novel verification methodology that uses geometric and topologic analysis to reveal unexpected behavior and coding errors in publicly available isosurface codes.

2) Although in the past geometry processing methods have been dominated by techniques that operate on triangular meshes, there is a growing interest in developing algorithms that operate natively on quad meshes (i.e., meshes composed of only quadrilateral elements). We present recent work in the general area of quadrilateral mesh processing, including quad mesh simplification algorithms. We also show how combining scalar field topology and combinatorial connectivity techniques, we can build a powerful user-driven quad mesh editing framework.

Related References (please contact speaker for copies of unpublished work):

R. Kirby and C. Silva. The need for verifiable visualization. IEEE Computer Graphics and Applications, 28(5):78–83, 2008.

T. Etiene, C. Scheidegger, L. G. Nonato, R. M. Kirby, and C. Silva. Verifiable visualization for isosurface extraction. IEEE Transactions on Visualization and Computer Graphics, 15(6):1227–1234, 2009.

T. Etiene, L. G. Nonato, C. Scheidegger, J. Tierny, T. J. Peters, V. Pascucci, R. M. Kirby, and C. Silva. Topology verification for isosurface extraction. Unpublished manuscript, 2010.

J. Daniels, C. Silva, and E. Cohen. Localized quadrilateral coarsening. Comp. Graph. Forum., 28(5):1436–1444, 2009.

J. Daniels, C. T. Silva, J. Shepherd, and E. Cohen. Quadrilateral mesh simplification. ACM Trans. Graph. (Proc of SIGGRAPH Asia), 27(5):1–9, 2008.

J. Tierny, J. Daniels, L. G. Nonato, V. Pascucci, and C. Silva. Interactive quadrangulation with reeb atlases and connectivity textures. Unpublished manuscript, 2010.

Bio:	Claudio T. Silva received the BS degree in mathematics from the Federal University of Ceara, Brazil, in 1990, and the PhD degree in computer science from the State University of New York at Stony Brook in 1996. He is an associate professor of computer science and a faculty member of the Scientific Computing and Imaging (SCI) Institute at the University of Utah. Before joining Utah in 2003, he worked in industry (IBM and AT&T), government (Sandia and LLNL), and academia (Stony Brook and OGI). He coauthored more than 150 technical papers and eight U.S. patents, primarily in visualization, geometric computing, and related areas. He is an active member of the visualization, graphics, and geometric computing research communities, having served on more than 70 program committees. He received IBM
Faculty Awards in 2005, 2006, and 2007, and best paper awards at IEEE Visualization 2007 and IEEE Shape Modeling International 2008. He is a member of the ACM, Eurographics, and IEEE. His research has been funded by NSF, DOE, NIH, IBM, Microsoft, and the University of Utah.
---------------------------------------------------------

Host:	Janos Simon
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.cs.uchicago.edu/pipermail/colloquium/attachments/20100408/d9bf4279/attachment.htm