Tools to embed tampering indicator into digital visual works...

Details Tools to embed tampering indicator into digital visual works... Tools to embed tampering indicator into digital visual works...

2006-04-27

2010-02-02

Rogers, Scott A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003110, C358S003200, C358S003280

Reexamination Certificate

active

07656557

ABSTRACT:
In accordance with one embodiment, apparatus are provided, which include a digital continuous-tone two-dimensional authentic image and an image processor. Tamper message data is provided which represents a tamper message when viewed. Two halftoning screens are provided to be applied to at least a portion of the continuous-tone two-dimensional authentic image, to embed the tamper message data within a portion of the authentic image, in a manner so as to be substantially not visible in a printed or displayed version of the authentic image absent image processing or tampering of the authentic image. The screens include a first screen to apply first elements arranged in a first way, and a second screen to apply second elements arranged in a second way. A halftoner applies the two halftoning screens to visibly portray desired information of the continuous-tone authentic image. The first screen is applied in a limited area of the authentic image and in a form defined by the tamper message data. The second screen is applied in an area abutting the limited area.

REFERENCES:
patent: 5788285 (1998-08-01), Wicker
patent: 6069636 (2000-05-01), Sayuda et al.
patent: 7212649 (2007-05-01), Watanabe et al.
patent: 2006/0262957 (2006-11-01), Asano
patent: 2009/0067006 (2009-03-01), Kobayashi et al.
patent: 01037581 (1989-02-01), None

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