Encoding and decoding method of a two-dimensional code and printed matter thereof

Abstract

The invention discloses a two-dimensional code coding method, a two-dimensional code decoding method and a two-dimensional code print. The two-dimensional code coding method includes the steps that a coding mode of input data is determined; the input data are converted to data code word streams; the error correction level, the line number M and the column number N are determined; error correction code words are generated and added to the position behind the data code word streams; a horizontal cutting line and a vertical cutting line of a two-dimensional code are generated, and the area defined by an outer frame of the two-dimensional code is cut into coding area blocks through the horizontal cutting line and the vertical cutting line; data code words to which the error correction code words are added are added to the coding area blocks, The two-dimensional code decoding method includes the steps that the two-dimensional code is scanned and a binary image is generated; a boundary image is generated; a frame image is generated; the coordinates of the vertexes of the coding area blocks are distinguished; the data code word streams are obtained; error correction is conducted on decoding data code word streams; the data are restored. The two-dimensional code is printed on the print. According to the two-dimensional code coding method, the two-dimensional code decoding method and the two-dimensional code print, high coding density is achieved, the length-width ratio of the two-dimensional code can be adjusted by adjusting the line number and the column number of the two-dimensional code, and therefore the different requirements of practical application can be met.

Description

technical field [0001] The present invention relates to two-dimensional code technology, and more particularly, to a two-dimensional code encoding and decoding method and its printed matter. Background technique [0002] One-dimensional code is an inexpensive, simple and accurate digital information transmission method. It expresses information through bars and spaces arranged in the horizontal direction, and does not express information in the vertical direction, and its capacity is very limited. In contrast, the two-dimensional code can also express information in the vertical direction, the capacity is greatly increased, and by applying error correction algorithms, the reliability of the two-dimensional code is also greatly enhanced. [0003] Conventional two-dimensional codes mainly include PDF417, QR, DataStrip and Data matrix, etc. They can be divided into two categories: layered two-dimensional codes and matrix two-dimensional codes. Among them, the layered two-dimen...

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Problems solved by technology

[0006] The present invention aims at the defect that the existing two-dimensional code cannot meet the actual application requirements due to its non-adjustable aspect ratio, and provides a coding and decoding method of the two-dimensional code and its printed matter. The generated two-dimensional code has high coding density, And you can adjust the aspect ratio of the QR code

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