Tools to embed information into digital visual works

Details Tools to embed information into digital visual works Tools to embed information into digital visual works

2005-12-19

2009-08-25

Lee, Thomas D (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003280

Reexamination Certificate

active

07580155

ABSTRACT:
Apparatus are provided, including a digital two-dimensional authentic image, an image processor, authentication message data, and a screen to be applied to at least a portion of the two-dimensional image. The authentication message data represent an authentication message, which may be a textual message, a symbol, or a pattern, and which may signify that the authentic image is authentic or original. The screen may apply two different halftoning operations. The two different halftoning operations include a first halftoning operation applying halftoning elements arranged in one way and a second halftoning operation applying halftoning elements arranged in second way. The first halftoning operation is applied in a limited area of the authentic image and in a form defined by the authentication message data, and the second halftoning operation is applied in an area surrounding the limited area.

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Anderson, B., High Tech Printing Makes IDs More Secure, securitymagazine.com, Jun. 1, 2004, BNP Media.
Your Guide to: Document Security, Appleton Papers, Wisconsin, United States, Dec. 2005.

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