Yoshinobu Hotta Jun Sun 0004 Yutaka Katsuyama Satoshi Naoi Robust Chinese Character Recognition by Selection of Binary-Based and Grayscale-Based Classifier. 553-563 2006 conf/das/2006 Document Analysis Systems http://dx.doi.org/10.1007/11669487_49 db/conf/das/das2006.html#HottaSKN06