US 12,138,949 B2
Method for manufacturing a two-dimensional coloured bar code and associated security device
Benoît Berthe, Courbevoie (FR); and Paul Azuelos, Courbevoie (FR)
Assigned to IDEMIA FRANCE, Courbevoie (FR)
Appl. No. 17/627,721
Filed by IDEMIA FRANCE, Courbevoie (FR)
PCT Filed Jul. 15, 2020, PCT No. PCT/FR2020/051268
§ 371(c)(1), (2) Date Jan. 17, 2022,
PCT Pub. No. WO2021/009461, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 19 08087 (FR), filed on Jul. 17, 2019.
Prior Publication US 2022/0355610 A1, Nov. 10, 2022
Int. Cl. G06K 19/08 (2006.01); B42D 25/305 (2014.01); B42D 25/351 (2014.01); B42D 25/435 (2014.01)
CPC B42D 25/435 (2014.10) [B42D 25/305 (2014.10); B42D 25/351 (2014.10)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a two-dimensional colored bar code comprising :
encoding an information element with a set of colored basic structural elements, at least one structural element of the set comprising a visual pattern; and forming the basic structural elements of the set on a backing in compliance with a predetermined layout, in order to create an arrangement of basic structural elements,
wherein the backing comprises a printed matrix comprising a plurality of pixels, wherein each pixel of the plurality of pixels comprises at least two sub-pixels of different colors;
wherein forming the basic structural elements comprises coloring the basic structural elements in compliance with the encoding and generating the visual pattern by modifying the backing at the level of at least a part of at least one sub-pixel of at least one pixel of the matrix.