Image analysis – Applications
Reexamination Certificate
2005-04-26
2005-04-26
Bali, Vikkram (Department: 2623)
Image analysis
Applications
Reexamination Certificate
active
06885757
ABSTRACT:
A low-frequency, temporally asymmetric watermark carrier decreases in luminance in a substantially monotonic manner more slowly than it increases in luminance in a substantially monotonic manner. This allows the carrier to be embedded, e.g., in a video work, in a manner that renders the resultant watermark virtually invisible to the human eye. Moreover, the resultant watermark is substantially resistant to common pirating techniques in which high-frequency visual content (e.g., including watermark data) tends to be filtered out by piracy processing.
REFERENCES:
patent: 6778678 (2004-08-01), Podilchuk et al.
patent: 20020090110 (2002-07-01), Braudaway et al.
Bloom Jeffrey Adam
Nafziger John Scott
Bali Vikkram
Burke, Esq. William J.
LaRose Colin
Sarnoff Corporation
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