This should be of interest to some folks... -Steve
> GFX Café 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. > > > > > > > > > -- > Pradeep Sen > Assistant Professor > Advanced Graphics Lab > Dept. of Electrical & Computer Engineering University of New > Mexico _______________________________________________ > gfx-cafe mailing list > [EMAIL PROTECTED] > http://lists.eece.unm.edu/mailman/listinfo/gfx-cafe > > ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
