@inproceedings{ICPR-2012-LiJ,
	author        = "Shigang Li and Hanchao Jia",
	booktitle     = "{Proceedings of the 21st International Conference on Pattern Recognition}",
	isbn          = "978-1-4673-2216-4",
	pages         = "902--905",
	publisher     = "{IEEE Computer Society}",
	title         = "{Vanishing point estimation by spherical gradient}",
	year          = 2012,
}