Method and device for optimizing embedding parameters of anti-copy two-dimensional code

Abstract

The present disclosure describes an optimization method for embedding parameters of an anti-copy two-dimensional code, which is characterized in that it includes: obtaining an initial two-dimensional code; printing and scanning the initial two-dimensional code to obtain multiple target two-dimensional codes; A target two-dimensional code, according to the method of smoothing and averaging, synthesize multiple target two-dimensional codes with a preset number of target two-dimensional codes into a corresponding two-dimensional code composite graph; calculate the mean value, variance and shape factor of the two-dimensional code composite graph, and correct them The corrected mean, corrected variance and corrected shape factor are obtained by modifying the mean, variance and shape factor of the function; the theoretical corrected bit error rate is obtained through the generalized Gaussian function based on the corrected mean, corrected variance and corrected shape factor; and the theoretical corrected bit error rate is compared with the two-dimensional The error correction ability of the code, when the theoretical corrected bit error rate is less than or equal to the error correction ability of the two-dimensional code, the error correction ability of the two-dimensional code is reduced to increase the attack cost of the illegal copying party.

Description

technical field [0001] The present disclosure relates to the field of information technology, in particular to a method and device for optimizing embedding parameters of an anti-copy two-dimensional code. Background technique [0002] After the traditional two-dimensional code is printed out, it is easy to be copied by illegal users. At present, the anti-copying methods of two-dimensional codes mainly include: (1) using digital watermark technology to prevent copying; (2) using special printing materials or processes to prevent copying; (3) using physical unclonable features to prevent copying; (4) Anti-copy with anti-copy patterns. [0003] Although the above-mentioned method can play the role of anti-copying to a certain extent, it also has obvious limitations: on the one hand, it reduces the versatility of the two-dimensional code, specifically the above-mentioned method reduces the effect of the two-dimensional code on the output and The universal applicability of the ...

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Problems solved by technology

[0003] Although the above-mentioned method can play the role of anti-copying to a certain extent, it also has obvious limitations: on the one hand, it reduces the versatility of the two-dimensional code, specifically the above-mentioned method reduces the effect of the two-dimensional code on the output and The universal applicability of the reading device, and there is a contradiction between the problem of resisting illegal copying and universal applicability; on the other hand, it cannot resist the reduction attack. The method cannot resist image restoration attacks against structured QR codes; on the other hand, it requires additional online information, etc. Specifically, the verification process of the above method cannot be completed based on offline image features, and additional online assistance is required. information, such as online databases

[0004] In order to better improve the anti-copy method, it is necessary to effectively analyze the illegally copied two-dimensional code, but the existing technology lacks further analysis of multiple illegally copied two-dimensional codes

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