US 11,755,861 B2
Printing system and printing determination method
Kazuyoshi Ohashi, Matsumoto (JP); Shun Hara, Matsumoto (JP); Kenji Uchibori, Shiojiri (JP); Riku Maeda, Shiojiri (JP); Hirofumi Yanagisawa, Shiojiri (JP); Yu Tsumuraya, Ota-ku (JP); and Kei Sadakuni, Kiyosu (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Aug. 17, 2022, as Appl. No. 17/820,504.
Claims priority of application No. 2021-133902 (JP), filed on Aug. 19, 2021.
Prior Publication US 2023/0053483 A1, Feb. 23, 2023
Int. Cl. G06F 15/00 (2006.01); G06K 15/02 (2006.01); G06K 15/10 (2006.01); G06F 3/12 (2006.01)
CPC G06K 15/1807 (2013.01) [G06F 3/1208 (2013.01); G06F 3/1242 (2013.01); G06K 15/102 (2013.01); G06K 15/1831 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A printing system comprising:
a printing unit that performs printing on a print medium based on print data;
a position determiner that randomly determines a position where a first information code is to be set in a printable region in which the print medium is printable by the printing unit;
a modifier that modifies the print data for printing an image, the first information code, and a positional information code having recorded therein positional information at the time of the printing that indicates the position determined by the position determiner so that the first information code is set at the position determined by the position determiner;
an acquirer that acquires the position of the first information code on the print medium as positional information after the printing via reading of a printing result of the printing performed by the printing unit on the print medium based on the print data and acquires the positional information at the time of the printing from the positional information code; and
a determiner that determines whether the printing result is a falsified matter based on comparison of the positional information after the printing acquired by the acquirer with the positional information at the time of the printing acquired by the acquirer.