Interaction-Dependent Semantics for Illustrative Volume Rendering

Peter Rautek, Stefan Bruckner, Meister Eduard Gröller
Interaction-Dependent Semantics for Illustrative Volume Rendering
Computer Graphics Forum, 27(3):847-854, May 2008. [ paper]
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Abstract

In traditional illustration the choice of appropriate styles and rendering techniques is guided by the intention of the artist. For illustrative volume visualizations it is difficult to specify the mapping between the 3D data and the visual representation that preserves the intention of the user. The semantic layers concept establishes this mapping with a linguistic formulation of rules that directly map data features to rendering styles. With semantic layers fuzzy logic is used to evaluate the user defined illustration rules in a preprocessing step. In this paper we introduce interaction-dependent rules that are evaluated for each frame and are therefore computationally more expensive. Enabling interaction-dependent rules, however, allows the use of a new class of semantics, resulting in more expressive interactive illustrations. We show that the evaluation of the fuzzy logic can be done on the graphics hardware enabling the efficient use of interaction-dependent semantics. Further we introduce the flat rendering mode and discuss how different rendering parameters are influenced by the rule base. Our approach provides high quality illustrative volume renderings at interactive frame rates, guided by the specification of illustration rules.

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@article{Rautek-2008-IDS,
  title =      "Interaction-Dependent Semantics for Illustrative Volume
               Rendering",
  author =     "Peter Rautek and Stefan Bruckner and Meister Eduard
               Gr{\"o}ller",
  year =       "2008",
  abstract =   "In traditional illustration the choice of appropriate styles
               and rendering techniques is guided by the intention of the
               artist. For illustrative volume visualizations it is
               difficult to specify the mapping between the 3D data and the
               visual representation that preserves the intention of the
               user. The semantic layers concept establishes this mapping
               with a linguistic formulation of rules that directly map
               data features to rendering styles. With semantic layers
               fuzzy logic is used to evaluate the user defined
               illustration rules in a preprocessing step. In this paper we
               introduce interaction-dependent rules that are evaluated for
               each frame and are therefore computationally more expensive.
               Enabling interaction-dependent rules, however, allows the
               use of a new class of semantics, resulting in more
               expressive interactive illustrations. We show that the
               evaluation of the fuzzy logic can be done on the graphics
               hardware enabling the efficient use of interaction-dependent
               semantics. Further we introduce the flat rendering mode and
               discuss how different rendering parameters are influenced by
               the rule base. Our approach provides high quality
               illustrative volume renderings at interactive frame rates,
               guided by the specification of illustration rules.",
  pages =      "847--854",
  month =      may,
  number =     "3",
  event =      "Eurographics/ IEEE-VGTC Symposium on Visualization",
  journal =    "Computer Graphics Forum",
  volume =     "27",
  location =   "Eindhoven, The Netherlands",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2008/Rautek-2008-IDS/",
}