Omnidirectional readable two-dimensional barcode system and reading method thereof

Abstract

The invention discloses an omnidirectional readable two-dimensional bar code system comprising a coding area and synchronization code elements. The coding area is formed by unit nodes arranged in an N*N matrix mode, wherein the N being a positive integer is larger than or equal to 11; and the synchronization code elements are distributed at the periphery of the coding area. Coding information sequences are distributed on all unit nodes arranged in a matrix array mode successively along a preset identifying and reading direction by using specific unit nodes as starting points; the starting points are identified by directional code elements. The directional code elements consist of a starting code element and 27 subsequent code elements; and the 28 code elements are distributed at different specific positions in the coding information sequences. The different specific positions are at four unit nodes at four corners of the matrix array, at two unit nodes adjacent to the unit node at each corner, and four unit nodes of each side center of the matrix array, wherein each two adjacent unit nodes of the four unit nodes form one group and the two groups are distributed at the two sides of the midpoint symmetrically. Therefore, omnidirectional reading can be carried out. In addition, the invention also discloses an identifying and reading method for an omnidirectional readable two-dimensional bar code system.

Description

technical field [0001] The present invention relates to two-dimensional barcodes. Background technique [0002] Barcodes can be divided into one-dimensional barcodes, stacked codes and two-dimensional barcodes. Wherein, the coding information sequence of the two-dimensional barcode is placed on each unit node in the coding area. The coded information unit usually takes the form of a matrix. When coding, the coded information is placed on the corresponding unit node according to a certain distribution rule starting from the starting point in the array. Similarly, when decoding, it also starts from the same starting point of the matrix array, extracts effective decoding information from each unit node according to the same distribution law, and sends it to the decoding system for decoding. Obviously, only by making the starting points of encoding and decoding coincide, and placing and reading information sequences according to the same distribution law, can the decoding be s...

AI Technical Summary

Problems solved by technology

This positioning method has disadvantages: it takes up the effective area and reduces the area of ​​the coding area; the starting point function graph lacks protection measures, once the graph is damaged, it will lead to decoding failure

However, sometimes the scan code may be turned 90 degrees or 270 degrees and then scanned, a total of four directions, so designing an omnidirectional readable two-dimensional barcode system is the direction of the applicant's efforts

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