@inproceedings{Zhu10,
author={Zhu, J. and Samuel, K.G.G. and Masood, S.Z. and Tappen, M.F.}, 
booktitle={IEEE Conference on Computer Vision and Pattern Recognition (CVPR)},
title={Learning to recognize shadows in monochromatic natural images}, 
year={2010}, 
month={June}, 
pages={223 -230}, 
doi={10.1109/CVPR.2010.5540209}, 
}