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

Abstract

The invention discloses an optimization method for embedding parameters of an anti-copy two-dimensional code, and the method is characterized in that the method comprises the steps: obtaining an initial two-dimensional code; printing and scanning the initial two-dimensional code to obtain a plurality of target two-dimensional codes; synthesizing a plurality of preset number of target two-dimensional codes into a corresponding two-dimensional code composite graph based on the plurality of target two-dimensional codes according to a smooth averaging mode; Calculating a mean value, a variance anda shape factor of the two-dimensional code composite graph, and correcting the mean value, the variance and the shape factor through a correction function to obtain a corrected mean value, a corrected variance and a corrected shape factor; Obtaining a theoretical correction bit error rate through a generalized Gaussian function based on the correction mean value, the correction variance and the correction shape factor; And the theoretical correction error rate is compared with the error correction capability of the two-dimensional code, and when the theoretical correction error rate is smaller than or equal to the error correction capability of the two-dimensional code, the error correction capability of the two-dimensional code is reduced, so that the attack cost of an illegal replicatoris improved.

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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