Bar code scanning signal decoding method and device

Abstract

The invention discloses a bar code scanning signal decoding method, device and a computer readable storage medium. As the scanning signals are preprocessed, positioning errors of an extreme point arereduced, the positioning accuracy of an edge position is greatly improved, the problems that great errors are generated when the edge position is calculated and certain offset exists in necessary edges due to over low resolution can be solved, the character parsing success rate in conditions of low scanning signal resolution and offset generated in the necessary edges is improved, and the robustness of the whole character parsing algorithm is enhanced.

Description

technical field [0001] The invention relates to the field of decoding barcodes. Background technique [0002] Bar code technology is an automatic identification technology produced and developed in the application practice of computers. It has the advantages of fast speed, high accuracy, strong reliability, and low cost. It has been widely used in commodity circulation, industrial production automation, office automation and other fields. . At present, the worldwide uniform coding of items has been widely popularized in various countries, and barcode automatic identification technology has become the common language of global item management and trade, and then penetrates into more technical fields. [0003] The current barcode recognition equipment is mainly divided into two types: laser code reader and image code reader. The principle of the laser code reader is to convert the optical signal into a one-dimensional scanning signal through a photoelectric converter, and th...

AI Technical Summary

Problems solved by technology

This method is easy to find wrong edges (such as noise and scratches) when dealing with barcode contamination due to noise and scratches, resulting in an error in the calculation of the sum of the distances between adjacent bars and spaces, which in turn leads to character parsing failures. ;

[0007] 2. On the basis of the previous method, add an edge deleter, which is used to judge whether the edge is a necessary edge, thereby reducing the redundant edge caused by noise and scratch pollution; but considering the barcode There are also deviations in the necessary edges of the unit module, such as large errors in the calculation of the edge position caused by the low resolution of the unit module, the position deviation of the actual edge caused by the overexposure of the image or ink diffusion during printing, etc., all of which will lead to Character parsing failed when measuring similarity

Images