US 12,093,780 B2
Reading optical codes
Pascal Schüler, Waldkirch (DE); and Steffen Zopf, Waldkirch (DE)
Assigned to SICK AG, Waldkirch (DE)
Filed by SICK AG, Waldkirch (DE)
Filed on Mar. 14, 2023, as Appl. No. 18/121,502.
Claims priority of application No. 22166611 (EP), filed on Apr. 5, 2022.
Prior Publication US 2023/0316025 A1, Oct. 5, 2023
Int. Cl. G06K 7/14 (2006.01); H03M 13/09 (2006.01)
CPC G06K 7/1473 (2013.01) [G06K 7/1417 (2013.01); H03M 13/096 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of reading an optical code that encodes a message, the message having a character chain with a plurality of characters, said method comprising the steps
recording image data having the optical code;
evaluating the image data with a reading of the message,
comparing the read characters of the message with a scheme that contains a fixed character for at least one position of the message that is expected at this position in codes to be read;
and recognizing an incorrectly read message and/or correcting the read message with reference to the comparison with the scheme,
wherein the scheme contains a variable character that is expected at this position in codes to be read for at least one position of the message, with a variable character being set to a partial range of the possible characters, but not to a fixed character.