Publication
Automatic Counterfeit Protection System Code Classification
Joost van Beusekom; Marco Schreyer; Thomas Breuel
In: Proceedings of SPIE Media Forensics and Security XII. SPIE Media Forensics and Security (SPIEMFS-2010), January 18-20, San Jose, CA, USA, Pages 1-8, SPIE, 1/2010.
Abstract
Wide availability of cheap high-quality printing techniques make document forgery an easy task that can easily be done
by most people using standard computer and printing hardware. To prevent the use of color laser printers or color copiers
for counterfeiting e.g. money or other valuable documents, many of these machines print Counterfeit Protection System
(CPS) codes on the page. These small yellow dots encode information about the specific printer and allow the questioned
document examiner in cooperation with the manufacturers to track down the printer that was used to generate the document.
However, the access to the methods to decode the tracking dots pattern is restricted. The exact decoding of a tracking pattern
is often not necessary, as tracking the pattern down to the printer class may be enough. In this paper we present a method
that detects what CPS pattern class was used in a given document. This can be used to specify the printer class that the
document was printed on. Evaluation proved an accuracy of up to 91%.