The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2026
Filed:
Nov. 14, 2022
Toppan Security Sas, Paris, FR;
Toppan Security Ireland Teoranta, Galway, IE;
Université Jean Monnet Saint Etienne, Saint Etienne, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Stéphane Ayala, Oron-la-ville, CH;
Nathalie Destouches, Saint-Etienne, FR;
Mathieu Hébert, Lyons, FR;
Nicolas Dalloz, Paris, FR;
TOPPAN SECURITY SAS, Paris, FR;
TOPPAN SECURITY IRELAND TEORANTA, Galway, IE;
UNIVERSITÉ JEAN MONNET SAINT ETIENNE, Saint Etienne, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
Abstract
A method of generating a multiplexed image for printing that can be observed in a plurality of modes includes determining a finite shape of a multiplexed palette in a combined color space. The contrast of the multiplexed image in each mode can be optimized by determining a maximum volume hyperrectangle enclosed in the finite shape. Gamut mapping to this maximum volume hyperrectangle allows for generation of a multiplexed image that has a maximum contrast and is free from artifacts caused by an interdependency between the colors in each mode. Performing a dimensionality reduction using PCA allows for reducing the complexity of the optimization problem.