Centre National De La Recherche Scientifique

Université Jean Monnet Saint-Étienne

Hid Global Cid Sas

Hid Global Ireland Teoranta

Mathieu Hébert

Alice Vermeulin

Marie Vangheluwe

Nathalie Destouches

Stéphane Ayala

Nicolas Dalloz

A method for building a security image for a security structure of a security document from multiplexing color images, including selecting a marking method capable of producing sets of colors on the security document comprising different colors that can be displayed according to illumination/observation modes of the security structure, establishing a plurality of color sets that can be displayed by the security structure in a plurality of the different illumination/observation modes, distributing the color sets in a plurality of groups of color sets, establishing combinations of groups of color sets having at least one color set in common across the number of different illumination/observation modes, selecting a combination of a group of color sets based on the number of desired illumination/observation modes and the number of colors per color image, and determining the color images to multiplex by means of the combination of the group of color sets selected.

Method for building a security image by multiplexing color images

Growing community of inventors

Lyons, France

Mathieu Hébert