Style Transfer Functions for Illustrative Volume Rendering

Stefan Bruckner, Meister Eduard Gröller
Style Transfer Functions for Illustrative Volume Rendering
TR-186-2-07-02, February 2007 [ Technical Report]
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Abstract

Illustrative volume visualization frequently employs non-photorealistic rendering techniques to enhance important features or to suppress unwanted details. However, it is difficult to integrate multiple non-photorealistic rendering approaches into a single framework due to great differences in the individual methods and their parameters. In this paper, we present the concept of style transfer functions. Our approach enables flexible data-driven illumination which goes beyond using the transfer function to just assign colors and opacities. An image-based lighting model uses sphere maps to represent non-photorealistic rendering styles. Style transfer functions allow us to combine a multitude of different shading styles in a single rendering. We extend this concept with a technique for curvature-controlled style contours and an illustrative transparency model. Our implementation of the presented methods allows interactive generation of high-quality volumetric illustrations.

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@techreport{TR-186-2-07-02,
  title =      "Style Transfer Functions for Illustrative Volume Rendering",
  author =     "Stefan Bruckner and Meister Eduard Gr{\"o}ller",
  year =       "2007",
  abstract =   "Illustrative volume visualization frequently employs
               non-photorealistic rendering techniques to enhance important
               features or to suppress unwanted details. However, it is
               difficult to integrate multiple non-photorealistic rendering
               approaches into a single framework due to great differences
               in the individual methods and their parameters. In this
               paper, we present the concept of style transfer functions.
               Our approach enables flexible data-driven illumination which
               goes beyond using the transfer function to just assign
               colors and opacities. An image-based lighting model uses
               sphere maps to represent non-photorealistic rendering
               styles. Style transfer functions allow us to combine a
               multitude of different shading styles in a single rendering.
               We extend this concept with a technique for
               curvature-controlled style contours and an illustrative
               transparency model. Our implementation of the presented
               methods allows interactive generation of high-quality
               volumetric illustrations.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  month =      2,
  number =     "TR-186-2-07-02",
  keywords =   "transfer functions, illustrative visualization, volume
               rendering",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-02/",
}