Information
- Publication Type: Technical Report
- Workgroup(s)/Project(s): not specified
- Date: April 1996
- Number: TR-186-2-96-12
- Keywords: flow visualization, streamsurfaces, complex dynamical systems, mixed-mode oscillations
Abstract
Occlusion is a crucial spatial cue for the human visual
system. Painters as well as researchers in the field of
computer graphics have been dealing with this aspect for a
long time. In the field of visualization occlusion can be
especially problematic. We present a new approach to
dealing with streamsurfaces that occlude major parts of the
system representation. Analyzing mixed-mode oscillations,
which are a special class of analytically defined dynamical
systems, we came across geometrically complex streamsurfaces
with curly shape. Certain regions of these surfaces, that
are necessary to describe the behavior of the system,
occlude major parts of the model. We combined and adopted
several visualization techniques to deal with this problem.
Streamarrows, which are semi-transparent portions of the
streamsurface, allow the viewer to see through and diminish
the problem of occlusion. Cross-sections and the removal
of certain portions of the model reduce occlusion as well
and thus improve visual perception. Choosing the shape of
an arrow for segmentation allows to visualize even more
information at the streamsurface, e.g., the direction of
the flow. An anisotropic spot noise texture is further
used to emphasize flow within a streamsurface. Finally
animation techniques were applied to facilitate the
interpretation of dynamical systems with complex shaped
streamsurfaces.
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BibTeX
@techreport{loeffelmann-1996-SVM,
title = "Streamarrows: Visualizing Multiple Layers of
Streamsurfaces",
author = "Helwig L\"{o}ffelmann and Lukas Mroz and Eduard Gr\"{o}ller
and Werner Purgathofer",
year = "1996",
abstract = "Occlusion is a crucial spatial cue for the human visual
system. Painters as well as researchers in the field of
computer graphics have been dealing with this aspect for a
long time. In the field of visualization occlusion can be
especially problematic. We present a new approach to dealing
with streamsurfaces that occlude major parts of the system
representation. Analyzing mixed-mode oscillations, which are
a special class of analytically defined dynamical systems,
we came across geometrically complex streamsurfaces with
curly shape. Certain regions of these surfaces, that are
necessary to describe the behavior of the system, occlude
major parts of the model. We combined and adopted several
visualization techniques to deal with this problem.
Streamarrows, which are semi-transparent portions of the
streamsurface, allow the viewer to see through and diminish
the problem of occlusion. Cross-sections and the removal of
certain portions of the model reduce occlusion as well and
thus improve visual perception. Choosing the shape of an
arrow for segmentation allows to visualize even more
information at the streamsurface, e.g., the direction of the
flow. An anisotropic spot noise texture is further used to
emphasize flow within a streamsurface. Finally animation
techniques were applied to facilitate the interpretation of
dynamical systems with complex shaped
streamsurfaces.",
month = apr,
number = "TR-186-2-96-12",
address = "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
institution = "Institute of Computer Graphics and Algorithms, Vienna
University of Technology ",
note = "human contact: technical-report@cg.tuwien.ac.at",
keywords = "flow visualization, streamsurfaces, complex dynamical
systems, mixed-mode oscillations",
URL = "https://www.cg.tuwien.ac.at/research/publications/1996/loeffelmann-1996-SVM/",
}