STACK BARCODE READER AND STACK BARCODE READING METHOD

摘要

A stack barcode reader may include an imaging section configured to image the stack barcode in which character information is expressed with a bar and a space; an image memory configured to store image data of the stack barcode; a data processing section including a decoding unit and configured to decode the barcode of the stack barcode into the character information. The decoding unit may include a low-level decoding unit, a high-level decoding unit, and a decoded result selection unit for selecting a decoded result. The high-level decoding unit may include an error-correction unit. The decoded result selection unit may include a counter unit configured to count the number of error corrections and a selection unit configured to select a decoded result having the less number of corrections.

主权项

1. A stack barcode reader for use with a stack barcode, the stack barcode reader comprising:
an imaging section configured to image the stack barcode in which character information is coded into a barcode so as to be expressed with a bar and a space; an image memory configured to store image data of the stack barcode imaged by the imaging section; a data processing section including a decoding unit and configured to decode the barcode of the stack barcode into the character information, on the basis of the image data; wherein the decoding unit includes a low-level decoding unit having a plurality of threshold calculation means for calculating a boundary between the bar and the space by different means; a high-level decoding unit for decoding the stack barcode into the character information by use of a code-word converted in the low-level decoding unit; and a decoded result selection unit for selecting a decoded result; and the high-level decoding unit includes an error-correction unit configured to execute an error-correction step; and the decoded result selection unit includes a counter unit configured to count the number of error corrections made in a code-word and storing it as the number of corrections; and a selection unit configured to select a decoded result having the less number of corrections by way of making a comparison of the numbers of corrections stored in the counter unit.