US 12,086,976 B2
Inspection method and inspection device
Ryohei Kuri, Minowa (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Dec. 23, 2021, as Appl. No. 17/560,362.
Claims priority of application No. 2020-216142 (JP), filed on Dec. 25, 2020.
Prior Publication US 2022/0207685 A1, Jun. 30, 2022
Int. Cl. G01J 3/46 (2006.01); G01J 3/50 (2006.01); G01N 21/27 (2006.01); G06T 7/00 (2017.01); G06T 7/11 (2017.01); G06T 7/90 (2017.01)
CPC G06T 7/001 (2013.01) [G01J 3/463 (2013.01); G01J 3/50 (2013.01); G01N 21/27 (2013.01); G06T 7/11 (2017.01); G06T 7/90 (2017.01); G06T 2207/10024 (2013.01); G06T 2207/20021 (2013.01); G06T 2207/30108 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An inspection method of inspecting whether reference image data of a reference image and captured image data of a captured image match each other, the inspection method comprising:
a first acquisition step of acquiring information in which information on a color difference with respect to a reference color is assigned to each of a plurality of first divided regions into which the reference image is divided;
a second acquisition step of acquiring information in which information on a color difference with respect to the reference color is assigned to each of a plurality of second divided regions into which the captured image is divided;
a first comparison step of comparing the information on the color difference of each of the first divided regions with the information on the color difference of each of the corresponding second divided regions; and
a second comparison step of comparing the information on the color difference of each of the first divided regions with the information on the color difference of each of the second divided regions in a combination different from the combination in which the comparison is performed in the first comparison step, wherein
whether the reference image data and the captured image data match each other is determined based on a first comparison result obtained in the first comparison step and a second comparison result obtained in the second comparison step.