FW: [Gfx-cafe] GFX Cafe Seminar Friday Oct 26, 2007

[Stephen Guerin]

This should be of interest to some folks...

-Steve

> GFX Caf? Seminar Friday October 26, 2007 12noon, ECE 118
>
> Food will be served
>
>
> TITLE:
> Scale Invariant Raster Image Representation Through
> Topological Encoding by Warren Hunt, graduate researcher,
> Advanced Graphics Lab
>
>
> ABSTRACT:
> Raster images have proved themselves to be a pervasive and
> necessary medium, however their fixed resolution and
> band-limited "digital" nature impose significant limitations.
> Vector graphics formats achieve resolution independence and
> can represent discontinuous image features, but at the cost
> of real-time performance. A desire for interactive and
> real-time performance, coupled with a need for scale
> invariant rendering, drives the search for improved 2D and 3D
> dataset imaging techniques.
>
> This work leverages a topological encoding of a dataset to
> attain scale invariance from a rasterized representation.
> This technique, called IStar, is a novel application of
> topology that captures the semantic characteristics in a
> graph-like structure. This structure, along with a
> reparametrized and sampled representation of the segmented
> dataset, is packaged as a standard raster image which can
> then be substantially downsampled and compressed. To view or
> render an IStar image, the encoded image is upsampled and the
> topological structure is used to reconstruct the original
> dataset. Unlike traditional raster approaches, this
> representation can preserve sharp discontinuities at any
> level of magnification, much like scalable vector graphics.
> Because this technique is raster-based, it is well suited to
> the real-time rendering pipeline.
> This technique is demonstrated, along with several extensions
> of the rendering function made possible by the topological encoding.
>
> This work was done in collaboration with Joe Kniss and Pradeep Sen.
>
>
> BIO:
> Warren Hunt is a New Mexico native with a diverse
> professional background.
> Originally trained in communications, Warren has worked as a
> television broadcast technician, disk jockey, and video
> editor. While working in the Los Angeles Post Production
> industry, Warren's clients included Walt Disney Studios and
> several television shows. His background also includes
> designing and building contemporary hardwood furniture, and
> serving champagne as old as he is, in some of New York's
> finest restaurants. While completing his Masters degree in
> Computer Science, Warren develops and supports visualization
> software at Sandia National Laboratories. His research
> interests are in Scientific Visualization and High
> Performance Computing. Warren is the father of two children
> and enjoys living close to the Rio Grande river.
>
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>
>
> --
> Pradeep Sen
> Assistant Professor
> Advanced Graphics Lab
> Dept. of Electrical & Computer Engineering University of New
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