Method of decoding bar codes and bar code reader

A barcode and reader technology, applied in the field of barcode readers, can solve problems such as not being optimal, complicated, and unable to determine whether the bar width is correct, etc.
CN1133132CInactive Publication Date: 2003-12-31FUJITSU LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJITSU LTD
Publication Date
2003-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

A bar code reader decodes a bar code in different directions if the bar code contains special characters whose bar widths have been corrected. The bar code reader compares the decoded results in the different directions with each other, to improve the bar code reading reliability. If the decoded results agree with each other, the results are accepted, and if not, they are discarded.
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Description

technical field

[0001] The invention relates to a method for decoding a barcode and a barcode reader. Background technique

[0002] Many stores and supermarkets employ POS (point of sale) systems that include barcode readers. Barcode readers must read barcodes that are not always well printed. Due to poor printing quality, some bars of the barcode are thicker or thinner than standard width, uneven texture or partially broken lines. A barcode reader needs to read such poor quality barcodes correctly.

[0003] A UPC barcode consists of a beginning guard bar, a middle bar, and an ending guard bar. The middle bar divides the barcode into two parts. The part between the start guard bar and the middle bar is the left block, and the part between the middle bar and the end guard bar is the right block. Each of the left and right blocks consists of six characters, so each barcode contains 12 characters. The photosensitive element of the bar code reader provides an electrical si...

Claims

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