Newsgroups: ont.events
Path: utzoo!utgpu!jarvis.csri.toronto.edu!csri.toronto.edu!clarke
From: clarke@csri.toronto.edu (Jim Clarke)
Subject: U of Toronto graphics seminar tomorrow (Dec. 20)
Message-ID: <8812191755.AA08452@harbord.csri.toronto.edu>
Organization: University of Toronto, CSRI
Distribution: ont
Date: Mon, 19 Dec 88 12:55:26 EST


     GRAPHICS SEMINAR - Tuesday, December 20, 3:00 p.m. in Room GB 221
               (GB = Galbraith Building, 35 St. George St.)

                              Turner Whitted
                      Department of Computer Science
              The University of North Carolina at Chapel Hill

                      "Accelerated Volume Rendering"

Volume rendering is the display of data sampled in three dimensions.  Usu-
ally, visualization of such data has been through conventional computer
graphics line or surface drawing methods preceded by processes that coerce
the sampled data into a form suitable for display.  This approach is being
replaced by new techniques which operate directly on the three dimensional
samples to avoid the artifacts introduced by the use of conventional graph-
ics primitives.

This talk describes one such technique designed for interactive use.  The
method is a concatenation of mappings from sample location and value to im-
age location and intensity.  The renderer achieves interactive speed by
running in a general purpose graphics accelerator, by avoiding any complex
classification procedures,  and by using look-up tables for most mappings.

Because the renderer is interactive, users are able to specify application
specific mapping functions on-the-fly.  Current applications include molec-
ular modeling, geology, and astronomy.
-- 
Jim Clarke -- Dept. of Computer Science, Univ. of Toronto, Canada M5S 1A4
              (416) 978-4058
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