Reading optical codes
AssigneeSick AG
InventorsPascal SCHÜLER, Steffen ZOPF
Life of this patent
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Abstract
A method of reading an optical code is provided that encodes a message that has a character chain having a plurality of characters, said method comprising the steps: of recording image data having the optical code; evaluating the image data by reading the message; comparing the read characters of the message with at least one scheme that contains a character for at least one position of the message that is expected at this position in codes to be read; and checking or correcting the read message based on a scheme matching the message after the comparison. A prefabricated catalog of schemes is provided here and a subset of the schemes of the catalog is activated for the comparison with the read characters of the message.
Claims18
A method of reading an optical code that encodes a message that has a character chain having a plurality of characters, said method comprising the steps
- recording image data having the optical code;
- evaluating the image data by reading the message;
- comparing the read characters of the message with at least one scheme that contains a character for at least one position of the message that is expected at this position in codes to be read;
- and
- checking or correcting the read message based on a scheme matching the message after the comparison,
- wherein a prefabricated catalog of schemes is provided;
- and wherein a subset of the schemes of the catalog is activated for the comparison with the read characters of the message.
An optoelectronic code reader having at least one light reception element for generating image data from received light and having a control and evaluation unit in which a method of reading optical codes is implemented, said method comprising the steps
- recording image data having the optical code;
- evaluating the image data by reading the message;
- comparing the read characters of the message with at least one scheme that contains a character for at least one position of the message that is expected at this position in codes to be read;
- and
- checking or correcting the read message based on a scheme matching the message after the comparison,
- wherein a prefabricated catalog of schemes is provided;
- and wherein a subset of the schemes of the catalog is activated for the comparison with the read characters of the message.
Dependencies are inferred from the claim text.