Image analysis – Applications
Reexamination Certificate
2006-05-30
2006-05-30
Do, Anh Hong (Department: 2621)
Image analysis
Applications
C382S103000, C382S112000
Reexamination Certificate
active
07054461
ABSTRACT:
The disclosure describes an authentication system and related methods for authenticating printed objects. The system uses an information-based metric along with one or more print quality metrics to provide accurate detection or classification of a counterfeit printed object. The print quality metric evaluates attributes of a subject image associated with the original printer, ink or paper to detect degradation of those operations due to copying operations like an image scanning and halftone printing subsequent to the original printing of the object. The information-based metric measures message symbol errors in an optically readable code, such as a digital watermark.
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Brosseau William A.
Brunk Hugh L.
Cordery Robert A.
Decker Stephen K.
Kilmartin William
Digimarc Corporation
Do Anh Hong
Pitney Bowes Inc.
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