06122403 is referenced by 842 patents and cites 267 patents.

Various improvements to steganographic systems, and applications therefore, are disclosed. The improvements include facilitating scale and rotation registration for steganographic decoding by use of rotationally symmetric steganographically embedded patterns and subliminal digital graticules; improved techniques for decoding without access to unencoded originals; improving robustness of steganographic coding in motion pictures and/or in the presence of lossy compression/decompression; and representing data by patterned bit cells whose energy in the spatial domain facilitates decoding registration. Applications include enhanced-security financial transactions, counterfeit resistant identification cards, fraud deterrent systems for cellular telephony, covert modem channels in video transmissions, photo duplication kiosks with automatic copyright detection, and hotlinked image objects (e.g. with embedded URLs) for use on the internet.

Title
Computer system linked by using information in data objects
Application Number
PCTUS9606618
Publication Number
6122403
Application Date
November 12, 1996
Publication Date
September 19, 2000
Inventor
Geoffrey B Rhoads
West Linn
OR, US
Agent
Elmer Galbi
Assignee
Digimarc Corporation
OR, US
IPC
G06K 9/36
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