Process for marking a multimedia document, such as an image, by generating a mark

Dugelay, Jean-Luc; Roche, Stéphane
Patent N°EP1031944

Method of marking a multi-media document lorig by generating a mark from said document and a marking image Iinf_0, comprising the following steps: decomposing the initial document lorig according to a lossy approximation method ; determining a reference image lref ; point-by-point subtracting the initial document lorig and the reference image lref., and according to at least one vector representative of the image in order to produce a support image Is ; formatting the marking image Iinf_0 so as to obtain an image Iinf1 of the same size as the support image Is by pre-introducing at least one level of redundancy; point-by-point combining the marking image Iinf_0, formatted beforehand, with the support image so as to generate a mark or a signature which can be, according to the case, either filed, or internally reintroduced into the initial document lorig. The combining of image Iinf1 and support image Is produces a compact-sized mark which can be either stored or reintegrated within the document itself.


DOI
Type:
Brevet
Date:
2000-08-29
Department:
Sécurité numérique
Eurecom Ref:
2092
Copyright:
© EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Patent N°EP1031944 and is available at : http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=EP1031944&F=0

PERMALINK : https://www.eurecom.fr/publication/2092