US 7,321,678 B2
Banknote identifying machine and banknote identifying method
Eiji Itako, Sakado (Japan)
Assigned to Kabushiki Kaisha Nippon Conlux, Tokyo (Japan)
Appl. No. 10/470,745
PCT Filed Nov. 11, 2002, PCT No. PCT/JP02/11724
§ 371(c)(1), (2), (4) Date Aug. 11, 2003,
PCT Pub. No. WO03/050772, PCT Pub. Date Jun. 19, 2003.
Claims priority of application No. 2001-380106 (JP), filed on Dec. 13, 2001.
Prior Publication US 2004/0151359 A1, Aug. 05, 2004
Int. Cl. G06K 9/00 (2006.01)
U.S. Cl. 382—137  [382/138; 382/139; 382/140] 9 Claims
OG exemplary drawing
 
1. A banknote identifying machine, comprising:
detecting means which scans a banknote being transported and irradiates light to the banknote to detect an amount of light transmitted through the banknote; and
judging means which determines whether the banknote is authentic based on a relative value between an amount of transmitted light through a watermark portion of the banknote detected by the detecting means and an amount of transmitted light through ordinary design portions other than the watermark portion.