Two-dimensional code coding method adopting layered structure and decoding method thereof

Abstract

The invention discloses a decoding method of a novel layered-structure two-dimensional code. For a novel layered two-dimensional code picture, a soft decoding method is used to preferentially decode primary information and then decode secondary information. The method possesses an advantage that reduction accuracy is high and is adapt to a current rapid development demand. In the invention, through scanning the layered two-dimensional code picture, gray-scale quantification image processing is used to carry out standardization on the two-dimensional code picture which may generate distortion so as to acquire a standard two-dimensional code matrix; soft-decision demodulation is performed on the generated standard two-dimensional code matrix so as to acquire a soft information bit stream; and the soft information bit stream is input into a matrix de-interleaver decoder and a Turbo code decoder to carry out error correcting, decoding and reduction so as to acquire a source data information flow, and decoding is completed and reduction accuracy of decoding is increased.

Description

technical field [0001] The present invention relates to the field of locating two-dimensional codes, in particular to a two-dimensional code encoding method and decoding method using a layered structure. Background technique [0002] Two-dimensional bar code / two-dimensional bar code (2-dimensional bar code) is to record data symbol information with black and white graphics arranged horizontally and vertically on the plane according to certain rules in a specific arrangement order. Using the concept of "0" and "1" bit streams based on the internal logic of the computer, the dark pattern corresponds to the "1" bit, and the light pattern corresponds to the "0" bit. Compared with the one-dimensional barcode, the two-dimensional code can not only express information in the horizontal direction but also in the vertical direction, and has a certain verification function, not only to identify the item but to describe the item, and it does not need to In most cases, barcodes need to...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a two-dimensional code encoding method using a layered structure, which has the ability to separate the primary information that needs to be encoded preferentially from the non-important secondary information of the source data information stream Coding to form a two-dimensional code picture can avoid the situation that the main information cannot be recognized by the large-scale defaced two-dimensional code, and improve the reliability of the two-dimensional code picture

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