@inproceedings{mann2003lightspace,
  title={The Lightspace Change Constraint Equation (LCCE) with practical application to estimation of the projectivity+ gain transformation between multiple pictures of the same subject matter},
  author={Mann, Steve and Manders, Corey and Fung, James},
  booktitle={Acoustics, Speech, and Signal Processing, 2003. Proceedings.(ICASSP'03). 2003 IEEE International Conference on},
  volume={3},
  pages={III--481},
  year={2003},
  organization={IEEE}
}