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EUROGRAPHICS -IEEE VGTC Symposium on Visualization (2005) K. W. Brodlie, D. J. Duke, K. I. Joy (Editors)

Summary: EUROGRAPHICS - IEEE VGTC Symposium on Visualization (2005)
K. W. Brodlie, D. J. Duke, K. I. Joy (Editors)
Galilean Invariant Extraction and Iconic Representation of
Vortex Core Lines
J. Sahner, T. Weinkauf, H.-C. Hege
Zuse Institute Berlin (ZIB), Berlin, Germany -- {sahner, weinkauf, hege}@zib.de
While vortex region quantities are Galilean invariant, most methods for extracting vortex cores depend on the
frame of reference. We present an approach to extracting vortex core lines independently of the frame of reference
by extracting ridge and valley lines of Galilean invariant vortex region quantities. We discuss a generalization
of this concept leading to higher dimensional features. For the visualization of extracted line features we use
an iconic representation indicating their scale and extent. We apply our approach to datasets from numerical
simulations and experimental measurements.
Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Line and Curve Genera-
tion I.3.3 [Computer Graphics]: Picture/Image Generation I.3.7 [Computer Graphics]: Three-Dimensional Graph-
ics and Realism
1. Introduction
Flow fields play a vital role in many research areas. Exam-
ples are burning chambers, turbomachinery and aircraft de-
sign in industry as well as visualization and control of blood


Source: Andrzejak, Artur - Konrad-Zuse-Zentrum für Informationstechnik Berlin


Collections: Computer Technologies and Information Sciences