Method for building a security image by multiplexing color images
US11350010B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Mar 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.