Jacqueline L. Feild Erik G. Learned-Miller Improving Open-Vocabulary Scene Text Recognition. 604-608 2013 ICDAR https://doi.org/10.1109/ICDAR.2013.125 https://doi.ieeecomputersociety.org/10.1109/ICDAR.2013.125 conf/icdar/2013 db/conf/icdar/icdar2013.html#FeildL13