BibTex Entry:

@ARTICLE{WINBAN02:GAT,
  author = {Holger Winnem{\"o}ller and Shaun Bangay},
  editor = {G. Drettakis and H.-P. Seidel},
  month = {September},
  year = 2002,
  title = {Geometric Approximations Towards Free Specular Comic Shading},
  journal = {Computer Graphics Forum},
  volume = 21,
  number = 3,
  pages = {309--316},
  publisher = {Blackwell Publishing},
  abstract = {We extend the standard solution to comic rendering with a
             comic-style specular component. In order to minimise the
             computational overhead associated with this extension, we
             introduce two optimising approximations: the perspective
             correction angle and the vertex face-orientation measure. Even
             though both of these optimisations are generally applicable, they
             are especially well-suited for applications where a physically
             correct lighting simulation is not required. With the
             optimisations in place, we achieve performances comparable to the
             standard solution. As our approximations favour large models, we
             even outperform the standard approach for models consisting of
             10,000 triangles or more, which we can render exceeding 40 frames
             per second, including the specular component.},
  keywords = {Comic Rendering; Cartoon Rendering; Level-of-Detail Measure;
             Non-Photorealistic Rendering; Perspective-Correction; Phong
             Lighting; Real-Time; Shading Maps},
  optissn = {0167-7055}
}