@InProceedings{schiwietz2007:freeformimage,
  author =    {Thomas Schiwietz, Joachim Georgii, R\"{u}diger Westermann},
  title =     {Freeform Image},
  booktitle = {Proceedings of the Pacific Conference on Computer Graphics and Applications},
  year =      {2007},
  pages =     {27--36},
  month =     {Oct.},
  editor =    {Marc Alexa and Steven J. Gortler and Tao Ju},
  publisher = {IEEE Computer Society},
}