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| Title | Exploring Scalar Fields Using Critical Isovalues
(In Proceedings) |
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| in | IEEE Visualization 2002 |
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| Author(s) |
Gunther H. Weber, Gerik Scheuermann, Bernd Hamann, Hans Hagen |
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| Editor(s) |
Robert J. Moorhead, Markus Gross, Ken Joy |
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| Keyword(s) | scalar field topology, critical point, volume visualization, data exploration, isosurfaces,
marching cubes |
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| Year |
October 2002
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| Location | Boston, MA |
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| Date | October 27--November 1, 2002 |
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| Publisher | IEEE Computer Society Press |
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| Address | Los Alamitos, CA |
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| Organization | IEEE |
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| Pages | 171--178 |
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| Download |  |
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| BibTeX |  |
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| Abstract |
Isosurfaces are commonly used to visualize scalar fields. Critical isovalues indicate
isosurface topology changes: the creation of new surface components, merging of
surface components or the formation of holes in a surface component. Therefore, they
highlight ``interesting'' isosurface behavior and are helpful in exploration of large
trivariate data sets. We present a method that detects critical isovalues in a scalar
field defined by piecewise trilinear interpolation over a rectilinear grid and
describe how to use them when examining volume data. We further review varieties of
the Marching Cubes (MC) algorithm, with the intention to preserve topology of the
trilinear interpolant when extracting an isosurface. We combine and extend two
approaches in such a way that it is possible to extract meaningful isosurfaces even
when a critical value is chosen as isovalue.
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