Image analysis – Applications
Reexamination Certificate
2007-01-30
2007-01-30
Johns, Andrew W. (Department: 2624)
Image analysis
Applications
C713S176000
Reexamination Certificate
active
10723731
ABSTRACT:
A fragile watermark is embedded in a document. The fragile watermark provides enhance security. In one implementation, a method is provided for embedding information in an image so that the image will have different information when a scanning or printing process reproduces the image. The method includes embedding digital information in an image; printing the embedded digital information and the image to produce a original printed image; scanning the original printed image to obtain a digital image of the embedded information and the image; determining the signal strength of the original image; and comparing the signal strength of a printed image with the signal strength of the original printed image to determine whether or not the printed image is a copy of the original printed image.
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Gustafson Ammon E.
Rhoads Geoffrey B.
Digimarc Corporation
Digimarc Corporation
Johns Andrew W.
LandOfFree
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