Image analysis – Applications
Reexamination Certificate
2005-04-26
2009-11-10
Bali, Vikkram (Department: 2624)
Image analysis
Applications
C713S176000
Reexamination Certificate
active
07616776
ABSTRACT:
Methods and apparatus for enhancing the robustness of watermark extraction from digital host content are provided. Embedded watermarks may be extracted from received digital host content in accordance with a stego key. A first watermark is extracted and a number of errors in the first extracted watermark is assessed. If the number of errors is above a first pre-determined value, at least a second watermark is extracted from the host content. A number of errors in at least the second extracted watermark is assessed. If the number of errors in at least the second extracted watermark is above a second pre-determined value, the extraction results for the extracted watermarks are combined in order to cumulatively assess the validity of the first extracted watermark and at least the second extracted watermark.
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Jemili Kanaan
Petrovic Rade
Tehranchi Babak
Winograd Joseph M.
Allison Andrae S
Bali Vikkram
Foley & Lardner LLP
Verance Corproation
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