Masakazu Iwamura Tomohiko Tsuji Akira Horimatsu Koichi Kise Real-Time Camera-Based Recognition of Characters and Pictograms. 76-80 2009 ICDAR http://dx.doi.org/10.1109/ICDAR.2009.259 conf/icdar/2009 db/conf/icdar/icdar2009.html#IwamuraTHK09