Digital security image provided with double-banded coding

Image analysis – Applications

Reexamination Certificate

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Details

C283S072000

Reexamination Certificate

active

07027613

ABSTRACT:
The invention relates to a digital security image, to be arranged on or in carrier, particularly a document, such as bonds or other documents the authenticity or origin of which is of importance, and having at least a first and second security characteristic visually almost imperceptibly incorporated in the digital security image, wherein the first security characteristic is detectably copied on a copy when copying the document and the second security characteristic is not copied onto said copy when copying the document, as well as a method for arranging and for detecting such a security element, as well as equipment for it. Additionally the invention relates to an image and an image in electronic form, provided with the security element according to the invention.

REFERENCES:
patent: 4146792 (1979-03-01), Stenzel et al.
patent: 4210346 (1980-07-01), Mowry, Jr. et al.
patent: 5530772 (1996-06-01), Storey
patent: 5904375 (1999-05-01), Brugada
patent: 6108512 (2000-08-01), Hanna
patent: 6574350 (2003-06-01), Rhoads et al.
patent: 0691632 (1996-01-01), None
patent: 1122939 (2001-08-01), None
patent: 2346110 (2000-08-01), None
patent: 9201701 (1994-05-01), None
patent: WO 95/27627 (1995-10-01), None
patent: WO 99/36876 (1999-07-01), None

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