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Fast shadowing of volume data

  • Björn Gudmundsson
  • Clas Tegenfeldt
3-D Vision
Part of the Lecture Notes in Computer Science book series (LNCS, volume 719)

Abstract

An algorithm for fast generation of shadows in volume rendering is presented. The algorithm is an extension of a method for incremental generation of rotation sequences of volume projections. A sequence is generated as a viewer followed by a light-source moves along a circular orbit around the volume. The points in shadow in a certain projection are those that are visible from the viewers position but not from that of the light-source. The incremental method allows us to exploit the coherence between successive projections in order to reduce the number of costly raycasting operations that are neccessary to determine if points are in shadow or not. The shadowing algorithm has been implemented and tested. The results show significant reductions in computational cost compared to “brute force” generation of shadows.

Keywords

3D-Volumes Volume Visualization Shadows 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Björn Gudmundsson
    • 1
  • Clas Tegenfeldt
    • 1
  1. 1.Image Processing Laboratory Dept. EE.Linköping UniversityLinköpingSweden

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