@article{bai2014shape,
  title={Shape vocabulary: A robust and efficient shape representation for shape matching},
  author={Bai, Xiang and Rao, Cong and Wang, Xinggang},
  journal={IEEE Transactions on Image Processing},
  volume={23},
  number={9},
  pages={3935--3949},
  year={2014},
  publisher={IEEE}
}