A 1D bar code decoding method

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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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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