Christmas Tree Case Study: Computed Tomography as a Tool for Mastering Complex Real World Objects with Applications in Computer Graphics

Armin Kanitsar, Thomas Theußl, Lukas Mroz, Milos Srámek, Anna Vilanova i Bartrolí, Balázs Csebfalvi, Jiří Hladůvka, Stefan Guthe, Michael Knapp, Rainer Wegenkittl, Petr Felkel, Dominik Fleischmann, Werner Purgathofer, Meister Eduard Gröller
Christmas Tree Case Study: Computed Tomography as a Tool for Mastering Complex Real World Objects with Applications in Computer Graphics
TR-186-2-02-07, March 2002 [ paper]
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Abstract

We report on using computed tomography (CT) as a model acquisition tool for complex objects in computer graphics. Unlike other modeling and scanning techniques the complexity of the object is irrelevant in CT, which naturally enables to model objects with, for example, concavities, holes, twists or fine surface details. Once the data is scanned, one can apply post-processing techniques aimed at its further enhancement, modification or presentation. For demonstration purposes we chose to scan a Christmas tree which exhibits high complexity which is difficult or even impossible to handle with other techniques. However, care has to be taken to achieve good scanning results with CT. Further, we illustrate the post-processing by means of data segmentation and photorealistic as well as non-photorealistic surface and volume rendering techniques.

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@techreport{kanitsar-2002-Chr,
  title =      "Christmas Tree Case Study: Computed Tomography as a Tool for
               Mastering Complex Real World Objects with Applications in
               Computer Graphics",
  author =     "Armin Kanitsar and Thomas Theu{\ss}l and Lukas Mroz and
               Milos Sr{\'a}mek and Anna Vilanova i Bartrol{\' i} and
               Bal{\'a}zs Csebfalvi and Ji{\v r}{\' i} Hlad{\r u}vka
               and Stefan Guthe and Michael Knapp and Rainer Wegenkittl and
               Petr Felkel and Dominik Fleischmann and Werner Purgathofer
               and Meister Eduard Gr{\"o}ller",
  year =       "2002",
  abstract =   "We report on using computed tomography (CT) as a model
               acquisition tool for complex objects in computer graphics.
               Unlike other modeling and scanning techniques the complexity
               of the object is irrelevant in CT, which naturally enables
               to model objects with, for example, concavities, holes,
               twists or fine surface details. Once the data is scanned,
               one can apply post-processing techniques aimed at its
               further enhancement, modification or presentation. For
               demonstration purposes we chose to scan a Christmas tree
               which exhibits high complexity which is difficult or even
               impossible to handle with other techniques. However, care
               has to be taken to achieve good scanning results with CT.
               Further, we illustrate the post-processing by means of data
               segmentation and photorealistic as well as
               non-photorealistic 		 surface and volume rendering
               techniques.",
  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 =      mar,
  number =     "TR-186-2-02-07",
  keywords =   "volume visualization, computed tomography, modeling",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2002/kanitsar-2002-Chr/",
}