@inproceedings{albuquerque2007QPC,
  title = {Qualitative Portrait Classification},
  author = {Albuquerque, Georgia and Stich, Timo and Magnor, Marcus},
  booktitle = {Proc. Vision, Modeling and Visualization ({VMV})},
  organization = {Eurographics},
  editor = {H.P.A. Lensch and B. Rosenhahn and H.-P. Seidel and P. Slusallek and J. Weickert},
  pages = {243--252},
  month = {Nov},
  year = {2007}
}