Method for coding and identifying stylizable anti-deformation two-dimensional code based on topological coding

By generating stylized, deformation-resistant QR codes based on topological coding, the problems of insufficient visual design and deformation resistance of traditional QR codes are solved, achieving high recognition rate and flexible application in complex environments.

CN122366486APending Publication Date: 2026-07-10NANJING TECH UNIV
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Patent Information

Application Number
CN202610388938.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-27
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional QR codes are insufficient in terms of visual design flexibility and resistance to deformation, making it difficult to meet the needs of highly stylized designs and wide media compatibility, especially in flexible electronics, smart packaging and curved products where the recognition success rate is low.

Method used

A topological coding-based method is used to encode information into a topological tree structure. Combined with polygon partitioning and recursive geometric encapsulation, a stylized QR code graphic is generated. Multi-candidate topological tree decoding and cyclic redundancy check mechanism ensure recognition robustness.

Benefits of technology

It significantly improves the robustness and reliability of QR code recognition in complex environments, balancing visual freedom and information carrying capacity, and adapting to highly robust recognition and personalized presentation in diverse scenarios.

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Abstract

The invention provides a stylizable anti-deformation two-dimensional code coding and identification method based on topological coding, and the method comprises the steps: converting a to-be-coded binary character string into a natural number through a bijective function, and carrying out the recursive decomposition to generate a topological tree structure; determining a space distribution proportion based on the block trace of each node in the topology tree; performing internal shrinkage processing on the polygonal area bearing the two-dimensional code, dividing the polygonal area into closed sub-areas which are not overlapped in proportion in a recursive manner, mapping the hierarchical structure of the topological tree into the two-dimensional code with a nested structure, and stylizing the two-dimensional code; a two-dimensional code image is scanned and preprocessed, a boundary contour of a closed area is extracted, a global topology tree is constructed, a plurality of candidate topology trees are enumerated and decoded one by one, and effective binary information is screened out after CRC check to serve as an identification result. According to the method, the anti-deformation capability of the two-dimensional code is realized through mapping of the topological tree structure and the nested region, and the visual effect and the application flexibility of the two-dimensional code are improved through stylization processing.
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