US 12,307,652 B2
Print inspection device, print inspection method, and program
Shenglan Li, Gifu-Ken (JP); Kazumi Banno, Gifu-Ken (JP); Masaki Nagase, Gifu-Ken (JP); Hideki Ota, Tokyo (JP); and Kunimitsu Toyoshima, Osaka (JP)
Assigned to KABUSHIKI KAISHA N-TECH, Gifu-ken (JP); KABUSHIKI KAISHA YAKULT HONSHA, Tokyo (JP); and TOHOSHOJI KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 17/923,912
Filed by KABUSHIKI KAISHA N-TECH, Gifu-ken (JP); KABUSHIKI KAISHA YAKULT HONSHA, Tokyo (JP); and TOHOSHOJI KABUSHIKI KAISHA, Osaka (JP)
PCT Filed Apr. 28, 2021, PCT No. PCT/JP2021/017037
§ 371(c)(1), (2) Date Nov. 7, 2022,
PCT Pub. No. WO2021/225108, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 2020-082856 (JP), filed on May 8, 2020.
Prior Publication US 2023/0334649 A1, Oct. 19, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 7/11 (2017.01); G06V 30/19 (2022.01)
CPC G06T 7/001 (2013.01) [G06T 7/11 (2017.01); G06V 30/1904 (2022.01); G06V 30/19093 (2022.01); G06T 2207/20021 (2013.01); G06T 2207/30144 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A print inspection device that inspects a character printed on an inspection target, the print inspection device comprising:
a capturing section that captures a region of the inspection target including a portion on which the character is printed;
a shape matching processor that executes a shape matching process to check a shape of a captured character pattern included in a captured image obtained by the capturing section against a shape of a preset reference character pattern while changing a deformation degree of the shape of the reference character pattern and to search for a matched character in which a similarity of the shape of the captured character pattern to the shape of the reference character pattern is greater than or equal to a threshold value;
a deformation pattern generator that generates a deformed character pattern, the deformed character pattern being obtained by deforming the reference character pattern at a deformation degree to which the character is matched in the shape matching process; and
an inspection processor that inspects whether a printed state of the character is satisfactory from a result of comparison between the deformed character pattern and the captured character pattern.