US 12,217,416 B2
Control method and system for surface-selective coating of an individual physical document with a liquid coating
René Heidner, Plauen (DE); and Martin Dimpfl, Lam (DE)
Assigned to Mühlbauer GmbH & Co. KG, Roding (DE)
Filed by Mühlbauer GmbH & Co. KG, Roding (DE)
Filed on Sep. 1, 2023, as Appl. No. 18/459,496.
Prior Publication US 2024/0078662 A1, Mar. 7, 2024
Int. Cl. G06K 15/02 (2006.01); G06T 7/00 (2017.01); G06T 7/50 (2017.01); G06T 7/60 (2017.01); G06T 7/90 (2017.01); G06V 30/18 (2022.01)
CPC G06T 7/001 (2013.01) [G06K 15/021 (2013.01); G06K 15/1822 (2013.01); G06K 15/1825 (2013.01); G06K 15/186 (2013.01); G06T 7/50 (2017.01); G06T 7/60 (2013.01); G06T 7/90 (2017.01); G06V 30/1801 (2022.01); G06T 2207/10024 (2013.01); G06T 2207/20081 (2013.01); G06T 2207/30144 (2013.01); G06T 2207/30176 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a coating device for surface-selective coating of a surface of an individual physical document with a liquid coating, wherein the method comprises:
receiving, or generating by image sensors, actual image information representing an actual image of the surface;
comparing the actual image information with reference image information, which represents a reference image of a reference surface corresponding to the surface, in order to determine any deformation of the surface with respect to the reference surface based on any deviations between the actual image and the reference image and to generate deformation information representing said deformation or an absence thereof;
determining, depending on the deformation information and on geometry information which defines a target shape of a partial surface of the surface to be provided with the liquid coating, a coating information which defines an actual shape of a partial surface of the surface to be coated by surface-selective liquid coating of the surface; and
controlling a coating device to cause the coating device to provide the surface of the document with the liquid coating in the defined partial surface in a surface-selective manner in accordance with the coating information;
wherein, when determining the coating information, the actual shape of the partial surface is determined from the geometry information using a distortion of the target shape defined as a function of the deformation information in such a way that, after the liquid coating has been carried out, an interaction of the actual shape of the coated partial surface with the shape of the surface in a region of the partial surface at least partially compensates for the distortion.