@article{CGF:CGF3056,
  author = {Trentacoste, Matthew and Mantiuk, Ratal and Heidrich, Wolfgang and Dufrot, Florian},
  title = {Unsharp Masking, Countershading and Halos: Enhancements or Artifacts?},
  journal = {Computer Graphics Forum},
  volume = {31},
  number = {2pt3},
  publisher = {Blackwell Publishing Ltd},
  issn = {1467-8659},
  url = {http://dx.doi.org/10.1111/j.1467-8659.2012.03056.x},
  doi = {10.1111/j.1467-8659.2012.03056.x},
  pages = {555--564},
  year = {2012}
}