@inproceedings{wang2012unsupervised,
  title={Unsupervised metric fusion by cross diffusion},
  author={Wang, Bo and Jiang, Jiayan and Wang, Wei and Zhou, Zhi-Hua and Tu, Zhuowen},
  booktitle={2012 IEEE Conference on Computer Vision and Pattern Recognition},
  pages={2997--3004},
  year={2012},
  organization={IEEE}
}