Authentication of physical and electronic media objects...

Details Authentication of physical and electronic media objects... Authentication of physical and electronic media objects...

2008-09-09

2010-10-26

Couso, Jose L (Department: 2624)

Image analysis

Applications

Reexamination Certificate

active

07822225

ABSTRACT:
A content watermarking method derives a watermark key from data representing content. In one particular method, a plural symbol message is algorithmically transformed in dependence on the derived watermark key. In another arrangement, the key specifies how or where the message is embedded in the content. A variety of other features and arrangements are also detailed.

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