Importance-driven volume rendering

Ivan Viola, Armin Kanitsar, Meister Eduard Gröller

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

144 Scopus citations


This paper introduces importance-driven volume rendering as a novel technique for automatic focus and context display of volumetric data. Our technique is a generalization of cut-away views, which - depending on the viewpoint - remove or suppress less important parts of a scene to reveal more important underlying information. We automatize and apply this idea to volumetric data. Each part of the volumetric data is assigned an object importance which encodes visibility priority. This property determines which structures should be readily discernible and which structures are less important. In those image regions, where an object occludes more important structures it is displayed more sparsely than in those areas where no occlusion occurs. Thus the objects of interest are clearly visible. For each object several representations, i.e., levels of sparseness, are specified. The display of an individual object may incorporate different levels of sparseness. The goal is to emphasize important structures and to maximize the information content in the final image. This paper also discusses several possible schemes for level of sparseness specification and different ways how object importance can be composited to determine the final appearance of a particular object.

Original languageEnglish (US)
Title of host publicationIEEE Visualization 2004 - Proceedings, VIS 2004
EditorsH. Rushmeier, G. Turk, J.J. Wijk
Number of pages7
StatePublished - 2004
Externally publishedYes
EventIEEE Visualization 2004 - Proceedings, VIS 2004 - Austin, TX, United States
Duration: Oct 10 2004Oct 15 2004

Publication series

NameIEEE Visualization 2004 - Proceedings, VIS 2004


OtherIEEE Visualization 2004 - Proceedings, VIS 2004
Country/TerritoryUnited States
CityAustin, TX


  • Focus+context techniques
  • Level-of-detail techniques
  • Non-photorealistic techniques
  • View-dependent visualization
  • Volume rendering

ASJC Scopus subject areas

  • General Engineering


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