@inproceedings{ijcai1969p8,
  title     = {Geometrical Pattern Feature Extraction by Projection on Haar Orthonormal Basis},
  author    = {Gerardin, Lucien A. and Flament, Jacques},
  booktitle = {Proceedings of the First International Joint Conference on
               Artificial Intelligence, {IJCAI-69}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Donald E. Walker and David C. Cooper},
  pages     = {65--78},
  year      = {1969},
  month     = {5},
  note      = {Pattern Recognition--signal Processing},
  url       = {https://ijcai.org/proceedings/1969/8},
}