Fluorescent two-dimensional code security identification method based on nano particles

Abstract

The invention provides a fluorescent two-dimensional code security identification method based on nano particles, which comprises the following steps: establishing a security database; taking a picture of a sample under test; and extracting an identification code in the picture of the sample under test, and comparing the identification code in the picture of the sample under test with the information in the security database to get a security identification result. The establishment of the security database includes the following steps: preparing a fluorescent material; making a security substrate; making a security pattern; taking a security picture; extracting feature information; and carrying out encoding and storage. The method has the following beneficial effects: as the distribution of the fluorescent material on the substrate is completely random, the security pattern cannot be copied; full-automatic modeling and anti-counterfeiting is realized; as long as a picture of a sample is input, a security identification result can be obtained through real-time analysis; and the up-conversion fluorescent material is very stable and does not fade at high temperature so that a security sample can be preserved for a long time and is not easy to lose effectiveness.

Description

technical field [0001] The invention relates to the field of optical anti-counterfeiting, and relates to a two-dimensional fluorescence distribution coding anti-counterfeiting marking method based on up-conversion luminescence of nanoparticles. Background technique [0002] Anti-counterfeiting is a technical measure to prevent counterfeiting and cloning by extracting and identifying characteristic information. At present, the anti-counterfeiting methods that are often encountered generally include laser tags, query labels, security line anti-counterfeiting paper, anti-counterfeiting ink, wireless anti-counterfeiting labels, special paper anti-counterfeiting and so on. The purpose of anti-counterfeiting is to help consumers identify the authenticity of items, so anti-counterfeiting technology should be as difficult as possible to forge and easy to identify while providing convenience to consumers. Anti-counterfeiting in the form of laser and query labels has been gradually a...

AI Technical Summary

Problems solved by technology

Traditional fluorescent anti-counterfeiting materials use fluorescence to be invisible to the naked eye under normal light, and to display patterns of specific wavelengths under specific light for anti-counterfeiting. The essence is to encrypt the printed pattern and fluorescent material. Once the type of up-conversion material used is identified, It is very easy to imitate, and there are certain limitations

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