The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2012
Filed:
May. 29, 2003
John Kennedy Barr, Tigard, OR (US);
Brett A. Bradley, Portland, OR (US);
Brett T. Hannigan, Portland, OR (US);
Adnan M. Alattar, Tigard, OR (US);
Robert Durst, Fort Meyers, FL (US);
John Kennedy Barr, Tigard, OR (US);
Brett A. Bradley, Portland, OR (US);
Brett T. Hannigan, Portland, OR (US);
Adnan M. Alattar, Tigard, OR (US);
Robert Durst, Fort Meyers, FL (US);
Digimarc Corporation, Beaverton, OR (US);
Abstract
A media object authentication system uses layers of security features based on digital watermarks embedded in media objects. The system generates a first digital watermark with a message payload carrying data about the object, such as a hash of text data printed on the object. The first digital watermark is combined with a content signature derived from features of the media object, such as frequency domain attributes, edge attributes, or other filtered version of the media signal (e.g., image photo on a secure document) on the media object. This combination forms a new digital watermark signal that is embedded in the host media object. Biometric information may also be embedded in a machine readable code in the object or indexed via the machine readable code. This biometric information is used to generate biometric templates, and facilitate or enhance biometric comparison for one to one or one to many verification.