US 12,094,097 B2
Digital color assessment
Romik Chatterjee, Austin, TX (US); Eric Heinen, Austin, TX (US); and Robert Eastlund, Austin, TX (US)
Assigned to Graftek Imaging Inc., Austin, TX (US)
Filed by Graftek Imaging Inc., Austin, TX (US)
Filed on Feb. 12, 2020, as Appl. No. 16/789,242.
Application 16/789,242 is a division of application No. 16/172,815, filed on Oct. 28, 2018, granted, now 10,565,700, issued on Feb. 18, 2020.
Application 16/172,815 is a division of application No. 15/339,662, filed on Oct. 31, 2016, granted, now 10,664,965.
Prior Publication US 2020/0184633 A1, Jun. 11, 2020
Int. Cl. G06T 7/00 (2017.01); G06T 7/90 (2017.01); H04N 1/60 (2006.01); H05B 45/20 (2020.01)
CPC G06T 7/0004 (2013.01) [G06T 7/90 (2017.01); H04N 1/6033 (2013.01); H04N 1/6086 (2013.01); G06T 2207/10012 (2013.01); G06T 2207/10024 (2013.01); G06T 2207/30164 (2013.01); H05B 45/20 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A method of assessing color digitally comprising the steps of:
digitally imaging a workpiece-specific color calibration chart under a first set of lighting conditions wherein creating said workpiece-specific calibration chart comprised digitally imaging a first workpiece and a wide gamut color target comprising colors in a color-space that encompasses all visible colors and is an absolute standard;
generating a first set of color measurement data from the workpiece-specific color calibration chart;
digitally imaging a different second workpiece under a second set of lighting conditions;
generating a second set of color measurement data from the workpiece;
comparing the first set of color measurement data to the second set of color measurement data to characterize the color of the second workpiece in the color-space that encompasses all visible colors and is an absolute standard ; and,
wherein the first set of lighting conditions and the second set of lighting conditions are substantially identical.