@inproceedings{Halper:2003:OAS,
  www =
         {http://wwwisg.cs.uni-magdeburg.de/graphik/pub/files/Halper_2003_OAS_Poster.pdf},
  author = {Nick Halper and Tobias Isenberg and Felix Ritter and Bert
            Freudenberg and Meruvia Pastor, Oscar E. and Stefan Schlechtweg and
            Thomas Strothotte},
  optkey = {},
  optannote = {},
  optseries = {},
  editor = {Jon Rokne and Reinhard Klein and Wenping Wang},
  url = {http://doi.ieeecomputersociety.org/10.1109/PCCGA.2003.1238288},
  address = {Los Alamitos, CA},
  localfile = {papers/Halper.2003.OAS.pdf},
  publisher = {IEEE},
  doi = {http://dx.doi.org/10.1109/PCCGA.2003.1238288},
  optmonth = {},
  organization = {IEEE Computer Society},
  optcrossref = {},
  booktitle = {Proceedings of the 11\textsuperscript{th} Pacific Conference on
               Computer Graphics and Applications 2003 (PG 2003, October 8--10,
               Canmore, Alberta, Canada)},
  optvolume = {},
  optnumber = {},
  title = {{OpenNPAR}: {A} {S}ystem for {D}eveloping, {P}rogramming, and
           {D}esigning {N}on-{P}hotorealistic {A}nimation and {R}endering},
  abstract = {The notable amount and variation of current techniques in
              non-photorealistic rendering (NPR) indicates a level of maturity
              whereby the categorization of algorithms has become possible. We
              present a conceptual model for NPR, on which we base a modular
              system, OPENNPAR, which integrates NPR algorithms into distinct
              classes. Components in OPENNPAR are modularized and consequently
              reintegrated for various rendering purposes, allowing many kinds
              of NPR algorithms to be reproduced, including the integration of
              2D and 3D methods. Additionally, the system provides support for a
              range of users (developers, programmers, designers) according to
              their respective levels of abstraction, thus being available in
              multiple contexts. Ultimately, OPENNPAR holds great potential as a
              tool in the development, augmentation, and creation of NPR
              effects.},
  year = {2003},
  pages = {424--428},
}