US 12,380,673 B2
Image-based matching of color and appearance of coatings containing effect pigments, using binary patterns derived from color model properties
Sebastian Hurtado Parra, Philadelphia, PA (US); Neil R. Murphy, Audubon, NJ (US); Francisco Miguel Martínez Verdú, Upper Darby, PA (US); Anthony Calabria, Thornton, PA (US); Larry Steenhoek, Ellicott City, MD (US); and Benjamin Gamoke, Collingswood, NJ (US)
Assigned to AXALTA COATING SYSTEMS IP CO., LLC, Wilmington, DE (US)
Filed by AXALTA COATING SYSTEMS IP CO., LLC, Wilmington, DE (US)
Filed on Feb. 1, 2023, as Appl. No. 18/163,090.
Prior Publication US 2024/0257493 A1, Aug. 1, 2024
Int. Cl. G06T 7/90 (2017.01); G06T 7/00 (2017.01); G06V 10/75 (2022.01)
CPC G06V 10/758 (2022.01) [G06T 7/0004 (2013.01); G06T 7/90 (2017.01); G06T 2207/10024 (2013.01); G06T 2207/30156 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method of matching color and appearance of coatings containing at least one effect pigment, the method comprising:
obtaining, for a coating sample to be matched, sample color image data comprising pixel-specific color model properties, wherein the sample color image data is based on a digital image of the coating sample to be matched, as captured by a digital image capture system;
creating local binary patterns based on the pixel-specific color model properties;
generating a binary pattern histogram for the local binary patterns, wherein the binary pattern histogram arranges the local binary patterns into N distinct bins to obtain N bin counts, and wherein the binary pattern histogram represents an appearance feature descriptor of the coating sample to be matched; and
utilizing the binary pattern histogram for comparison against a previously generated binary pattern histogram that serves as an appearance feature descriptor of a candidate coating specimen,
wherein the local binary patterns are placed into a bin depending on the positions of 0s and 1s in the local binary pattern relative to each other without regard to the numerical value of the local binary pattern.