Javier Nieves Igor Ruiz-Agundez Pablo Garcia Bringas Recognizing Banknote Patterns for Protecting Economic Transactions. 247-249 2010 DEXA Workshops http://doi.ieeecomputersociety.org/10.1109/DEXA.2010.86 conf/dexaw/2010 db/conf/dexaw/dexaw2010.html#NievesRB10