@article{cg2008pu,
  title = {A Perception-Based User Interface for Reconstructing Architecture Drawings},
  author = {Sangwon Lee and David Feng and Bruce Gooch and Cindy Grimm},
  journal = {Computer Graphics Forum},
  volume = {27},
  number = {1},
  pages = {81--90},
  publisher = {Eurographics},
  note = {Building architectural models by sketching over photographs},
  month = {March},
  year = {2008}
}