Dot-matrix two-dimensional code and coding and recognition method of dot-matrix two-dimensional code

Abstract

The invention discloses a dot-matrix two-dimensional code and coding and identification methods for the dot-matrix two-dimensional code. A preset number of code points are distributed on the dot-matrix two-dimensional code; at least one code area is set in the dot-matrix two-dimensional code, wherein the code area comprises at least one data column and at least one positioning column, and the datacolumns and the positioning columns are periodically and alternatively arranged; reference points are computed according to standard positioning points on the periphery of data points; the size and the direction of vectors from the reference points to the data points are computed; code data is formed according to the size and the direction of the vectors; all the code points in the code areas aresegmented out in the identification process, the positioning columns and the data columns are identified, the size and the direction of the vectors from the reference points to the data points are computed, the code data is identified, and operation corresponding to the code data is carried out. According to the dot-matrix two-dimensional code and coding and identification methods for the dot-matrix two-dimensional code, the data columns and the positioning columns are only required to be in line in one direction basically, more data information can be contained, the coding capacity is large,the dot-matrix two-dimensional code adapts to large optical imaging distortion, the visual interference on the human eyes is small, and the identification mode is simple and stable.

Description

technical field [0001] The invention relates to the technical field of image recognition, in particular to a dot-matrix two-dimensional code and a method for encoding and identifying the dot-matrix two-dimensional code. Background technique [0002] Dot matrix QR code is an emerging information encoding method in recent years, which is often used in children's audiobooks. The dot-matrix QR code has the characteristics of large amount of information carrying, strong concealment, and does not affect the visual appearance of publications. At the same time, it has the function of encryption and anti-counterfeiting. It can be perfectly combined with paper media to assist children in three-dimensional learning combined with vision and hearing. [0003] At present, most of the dot matrix two-dimensional code design schemes need to use straight line detection or the variance of each row obtained by performing radon transformation on the dot matrix to obtain the two directions of the...

AI Technical Summary

Problems solved by technology

This requires the design of the point pattern of the code area to consider that the distribution of points in the horizontal and vertical directions is closer to a straight line, which inevitably takes up additional code area space, making it impossible to set more data points in the same area of ​​code area

[0004] In existing systems, the X and Y directions are detected through the distribution of code points. Among them, the X direction is the horizontal direction to the right after the code area is aligned, and the Y direction is the vertical downward direction after the code area is aligned. Due to the arrangement of the positioning points It is necessary to consider the detection of the X-axis and Y-axis of the code area, so the positioning point occupies a lot of space in the code area, and the unit size code area has a limited number of data points; there are existing code points that include both positioning points on an approximate straight line Also includes data points, anchor points and data points intersect, there is no column completely containing anchor points or data points, this scheme uses a large number of interpolation calculation reference points, so the anti-distortion ability is relatively weak

[0005] In addition, for example, the national standard formulated by MPR uses the presence or absence of dots to represent data. In practical applications, this scheme has problems such as high requirements on printing quality and unsightly appearance.

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