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US 7,171,020 B2Granted
Method for utilizing fragile watermark for enhanced security
AssigneeDigimarc Corporation
InventorsGeoffrey B. Rhoads, Ammon E. Gustafson
Life of this patent
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AssigneeDigimarc Corporation
InventorsGeoffrey B. Rhoads, Ammon E. Gustafson
Estimating the term…
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.
A method for embedding information in an image so that the image will have different information when the image is reproduced by a scanning or printing process, the method comprising:
A method to determine whether an image or video has been reproduced, the method comprising:
Dependencies are inferred from the claim text.