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Open Access Publications from the University of California

A Multi-Resolution Interactive Previewer for Volumetric Data on Arbitary Meshes

  • Author(s): Kreylos, Oliver
  • Ma, Kwan-Liu
  • Hamann, Bernd
  • Editor(s): Outhyoung, M.
  • Shih, Z.
  • et al.

In this paper we describe a rendering method suitable for interactive previewing of large-scale arbitary-mesh volume data sets. A data set to be visualized is represented by a ''point cloud,'' i. e., a set of points and associated data values without known connectivity between the points. The method uses a multi-resolution approach to achieve interactive rendering rates of several frames per second for arbitrarily large data sets. Lower-resolution approximations of an original data set are created by iteratively applying a point- decimation operation to higher-resolution levels. The goal of this method is to provide the user with an interactive navigation and exploration tool to determine good viewpoints and transfer functions to pass on to a high-quality volume renderer that uses a standard algorithm.

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