@inproceedings{takahashi2012new,
  title = {A new mirror-based extrinsic camera calibration using an orthogonality constraint},
  author = {Takahashi, Kosuke and Nobuhara, Shohei and Matsuyama, Takashi},
  booktitle = {Proc.\ of IEEE Conference on Computer Vision and Pattern Recognition (CVPR)},
  pages = {1051--1058},
  year = {2012},
  url = {http://vision.kuee.kyoto-u.ac.jp/%7Enob/proj/mirror/},
  pdf = {http://vision.kuee.kyoto-u.ac.jp/%7Enob/pdf/takahashi2012new.pdf}
}