Two-dimensional code recognition method and two-dimensional code based on contour recognition

Abstract

The invention provides a two-dimensional code recognition method based on contour recognition, which recognizes the positioning mark through the topological structure of the contour of the positioning mark. The invention also provides a two-dimensional code based on contour recognition. The beneficial effect of the present invention is that the improved positioning mark no longer uses the original explicit identification features, but uses the more implicit feature of "topological structure of the positioning mark outline" to identify the positioning mark, and when scanning the code, pass Analyze the topological structure of the graph, find out the topological structure that meets the requirements and identify it as a positioning mark, so as to liberate the specific shape of the positioning mark, which can be customized according to the needs, so that the form of the two-dimensional code can be more personalized. It is beneficial to maintain the overall fault tolerance of the QR code.

Description

technical field [0001] The invention relates to two-dimensional codes, in particular to a two-dimensional code recognition method based on contour recognition and two-dimensional codes. Background technique [0002] Two-dimensional code is also called two-dimensional barcode. The common two-dimensional code is QR Code. The full name of QR is Quick Response. It is a very popular coding method on mobile devices in recent years. It can store more The information can also represent more data types. Two-dimensional bar code / two-dimensional bar code (2-dimensional bar code) records data symbol information with a specific geometric figure distributed on a plane (two-dimensional direction) according to certain rules; Using the concepts of "0" and "1" bit streams that constitute the logical basis of the computer, using several geometric shapes corresponding to binary to represent text and numerical information, automatic reading through image input equipment or photoelectric scannin...

AI Technical Summary

Problems solved by technology

This feature is explicit and rigid, and it is difficult to incorporate some user-defined elements into it. At present, users usually add custom elements to the center of the QR code for personalization, but this method is actually Rely on the error correction mechanism of the QR code itself to ensure that the read data is error-free, so adding self-defined elements actually reduces the overall error tolerance of the QR code

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