Two-dimension code and method for recognizing same

Abstract

The invention relates to a two-dimension code and a method for recognizing the same. Code words in the two-dimension code are in the shape of a centrosymmetric polygon and are divided into a positioning portion and a data portion, and the positioning portion comprises a polygonal center point, a polygonal vertex and a positioning point arranged on a connecting line between the center point and the vertex. The data portion consists of a code element region and code elements in the code element region, and the code element region is arranged in the polygon. Compared with the prior art, the two-dimension code in the technical scheme has a wider code value, higher recognition efficiency and better antijamming capability and error correcting capability.

Description

technical field [0001] The invention relates to a two-dimensional code, in particular to a two-dimensional code with large information content and high recognition rate and a method for recognizing the two-dimensional code. Background technique [0002] In recent years, due to its large storage capacity, high confidentiality, high traceability, strong damage resistance, large backup, and low cost, two-dimensional codes have been used in forms, security and confidentiality, tracking, licenses, inventory, and data. Backup and other fields have been widely used. Usually, designers of two-dimensional codes will embed some fixed patterns in the barcode as the basis for positioning and orientation of reading. [0003] For the convenience of description, in the following we will refer to a recognition unit in a two-dimensional code as a "code word", a black and white block or a black and white point representing data in a code word as a "code element", and a code element in a code...

AI Technical Summary

Problems solved by technology

This algorithm has indeed improved the utilization rate of codewords, but obviously a shortcoming is that the reference symbols and directional symbols are very small, especially the length of its short side is very short. The method of extending the line determined by two very close points in the code element to determine the code word area is likely to have a large inclination with the actual grid line, and the result directly affects the search and calculation of the data symbol

[0007] In the above two traditional invisible two-dimensional code algorithms, the positioning line and the virtual line are parallel, and some of them are very close to each other. It is easy for the two to interfere with each other and affect the stability of the calculation.

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