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A 1D bar code decoding method

A decoding method and technology for 2D barcodes, applied to the field of decoding fuzzy pattern recognition of 1D barcodes, can solve the problems of easy misinterpretation, error-prone barcodes, and difficult to distinguish, etc. The effect of decoding

Inactive Publication Date: 2005-09-28
广州市朗特数码科技有限公司
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Problems solved by technology

[0008] Among the published coding schemes, the decoding error rate caused by the coding of multi-width coded barcodes is low, while the barcodes with two width codes are relatively error-prone
The published barcode decoding method uses the similar edge distance measurement method, which is a traditional classic barcode algorithm. Although it can effectively decode barcodes encoded with multiple element widths, this method is not suitable for barcodes with two width elements. Suitable, the reason is that the calculation results of the similar side distance measurement of the two width element barcodes are very close, and it is difficult to distinguish due to printing and other deviations, and some of the barcode coding logic is not strict enough, so it is easy to misinterpret. linear barcode

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  • A 1D bar code decoding method
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[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] A kind of fuzzy identification and decoding method of one-dimensional barcode of the present invention, this method is carried out by the barcode decoding system that contains laser scanning device, signal preprocessing unit, central processing unit and scanning alarm output unit, and it comprises the following steps:

[0050](a) The laser scanning device collects barcode data, and converts the collected data into bar / space pulse electrical signals, and then transmits the electrical signals to the signal preprocessing unit;

[0051] (b) The electrical signal is converted into an interrupt signal in the signal preprocessing unit and output to the central processing unit, where it is queued according to the priority level of the encoding type, and barcodes with multiple widths are decoded first, and barcodes with two widths are finally deco...

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Abstract

The one-dimensional bar code distinguishing and decoding method in fuzzy mode is completed in a bar code decoding system comprising laser scanning unit, signal pre-treating unit, CPU unit and scanning alarm and output unit. The method includes the following steps: converting the acquired data into electric bar / gap pulse signal; signal pre-treatment; classifying treatment of code form characteristic value; fuzziness degree calculation; polymerization degree calculation; adding the fuzziness degree and the polymerization degree; calculating and matching with the corresponding code list of distinguishable code, which has the sum of fuzziness degree and polymerization degree smaller than certain constant number, while discarding undistinguishable code; discarding code incapable of matching; repeating until finishing the sampled data. The present invention is simple, efficiency and fast.

Description

technical field [0001] The invention relates to a decoding method of a one-dimensional barcode, in particular to a decoding method for fuzzy pattern recognition of the one-dimensional barcode to solve the problem that the linear code of the one-dimensional barcode is not clearly distinguished and easily causes misinterpretation. Background technique [0002] dead zone start code data code checksum termination code dead zone [0003] As a cheap, simple, fast and accurate digital information transmission method, one-dimensional barcode was first proposed by Kermod in the 1920s, and it has been widely used in many industries today. [0004] Due to factors such as barcode coding, barcode printing quality, wear, and smearing, it is difficult to interpret barcodes or decode errors (especially early barcodes such as independent 25 codes, etc.). To solve such problems, progress will be made in three aspects: (1) The sensing dist...

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Application Information

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IPC IPC(8): G06K7/10
Inventor 丁援陈代棠欧贝怡马振明
Owner 广州市朗特数码科技有限公司
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