Digital watermarking and banknotes

Details Digital watermarking and banknotes Digital watermarking and banknotes

B - Operations, Transporting

41

M

B41M 3/14 (2006.01) B42D 15/00 (2006.01) G06T 1/00 (2006.01) B44F 1/12 (2006.01)

Patent

CA 2326565

Machine readable data is digitally watermarked into banknotes (16). Such watermarking can be optically sensed (13) and detected by various devices (11). In response, such devices (11) can intervene to prevent banknote reproduction. This arrangement addresses various problems, e.g., the use of digital image editing tools to circumvent other banknote anti-copy systems.

Des données exploitables sur machine sont imprimées numériquement sous la forme de filigranes sur des billets de banque (16), différents dispositifs (11) pouvant servir à capter optiquement (13) et à détecter ces filigranes. Ensuite, ces dispositifs (11) peuvent également être utilisés pour prévenir toute falsification des billets de banque. La structure de cette invention permet de résoudre divers problèmes, par exemple l'utilisation d'outils de mise en forme d'images numériques conçus pour contourner les systèmes de lutte contre la contrefaçon des espèces.

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