The Inverse Warp: Non-Invasive Integration of Shear-Warp Volume Rendering into Polygon Rendering Pipelines

Stefan Bruckner, Dieter Schmalstieg, Helwig Hauser, Meister Eduard Gröller
The Inverse Warp: Non-Invasive Integration of Shear-Warp Volume Rendering into Polygon Rendering Pipelines
In Workshop on Vision, Modeling and Visualization, pages 529-536. November 2003.
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Abstract

In this paper, a simple and efficient solution for combining shear-warp volume rendering and the hardware graphics pipeline is presented. The approach applies an inverse warp transformation to the Z-Buffer, containing the rendered geometry. This information is used for combining geometry and volume data during compositing. We present applications of this concept which include hybrid volume rendering, i.e., concurrent rendering of polygonal objects and volume data, and volume clipping on convex clipping regions. Furthermore, it can be used to efficiently define regions with different rendering modes and transfer functions for focus+context volume rendering. Empirical results show that the approach has very low impact on performance.

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@inproceedings{Bruckner-2003-The,
  title =      "The Inverse Warp: Non-Invasive Integration of Shear-Warp
               Volume Rendering into Polygon Rendering Pipelines",
  author =     "Stefan Bruckner and Dieter Schmalstieg and Helwig Hauser and
               Meister Eduard Gr{\"o}ller",
  year =       "2003",
  abstract =   "In this paper, a simple and efficient solution for combining
               shear-warp volume rendering and the hardware graphics
               pipeline is presented. The approach applies an inverse warp
               transformation to the Z-Buffer, containing the rendered
               geometry. This information is used for combining geometry
               and volume data during compositing. We present applications
               of this concept which include hybrid volume rendering, i.e.,
               concurrent rendering of polygonal objects and volume data,
               and volume clipping on convex clipping regions. Furthermore,
               it can be used to efficiently define regions with different
               rendering modes and transfer functions for focus+context
               volume rendering. Empirical results show that the approach
               has very low impact on performance.",
  pages =      "529--536",
  month =      nov,
  booktitle =  "Workshop on Vision, Modeling and Visualization",
  editor =     "T. Ertl, B. Girod, G. Greiner, H. Niemann, H.-P. Seidel, E.
               Steinbach, R. Westermann",
  isbn =       "3898380483",
  publisher =  "infix",
  keywords =   "focus+context techniques, clipping, hybrid volume rendering",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/",
}