@inproceedings{ijcai2009p234,
  title     = {Using Entropy to Distinguish Shape Versus Text in Hand-Drawn Diagrams},
  author    = {Bhat, Akshay and Hammond, Tracy},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1395--1399},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/234},
}