@inproceedings{ICDAR-1997-SauvolaSHP,
	author        = "Jaakko J. Sauvola and Tapio Seppänen and Sami Haapakoski and Matti Pietikäinen",
	booktitle     = "{Proceedings of the Fourth International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.1997.619831",
	isbn          = "0-8186-7898-4",
	pages         = "147--152",
	publisher     = "{IEEE Computer Society}",
	title         = "{Adaptive Document Binarization}",
	year          = 1997,
}