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A double anti-counterfeiting method for halftone information of microstructure dots

A half-tone and microstructure technology, applied in information-carrying cards, instruments, calculations, etc., can solve the problems of low difficulty in cracking, high processing and production costs, and affecting the integrity and beauty of printed graphics, and achieve high anti-counterfeiting performance Effect

Active Publication Date: 2020-12-01
NANJING FORESTRY UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Traditional printing anti-counterfeiting technologies such as paper anti-counterfeiting, ink anti-counterfeiting, and laser holography can prevent infringement to a certain extent, but it is not difficult to crack, and the processing and production costs are high; function, but it must occupy an independent area on the printed matter, which affects the integrity and beauty of the printed graphics

Method used

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  • A double anti-counterfeiting method for halftone information of microstructure dots
  • A double anti-counterfeiting method for halftone information of microstructure dots
  • A double anti-counterfeiting method for halftone information of microstructure dots

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Embodiment Construction

[0028] like Figure 1-2 As can be seen, the present invention comprises the following steps:

[0029] S1: Design the threshold value matrix of microscopic artistic dots and circular dots: create a threshold matrix based on the image, using artistic letter H-shaped dots or circular dots, according to the shape characteristics of the dots, the growth order of the dots starts from the center of the threshold matrix, and the distance to the point The nearest point is used as the next point of growth. When there are multiple points at the same distance from the center point, rotate and grow in a clockwise direction, expand from inside to outside until the entire matrix unit is filled, and a network point unit is obtained;

[0030] S2: Anti-counterfeiting information chaotic scrambling encryption: Generate a m×n chaotic sequence according to the anti-counterfeiting information map F(m,n), and scramble the pixels of the anti-counterfeiting information map according to the chaotic seq...

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Abstract

The invention provides a halftone information dual anti-fake method for microstructure websites. The method comprises the steps of: (S1) design of microscopic letter H-shaped website and circular website threshold matrixes; (S2) chaos scrambling encryption of anti-fake information; (S3) preprocessing of the anti-fake information after scrambling; (S4) halftone processing of carrier images and information hiding; and (S5) authentication of the anti-fake information. The method realizes multiple anti-fake of halftone images; the websites have non-repeatability, so that the multiple anti-fake isrealized, even if extracted information still has security; the hidden information occupies no breadth; the detecting method is various; and the anti-fake performance is higher.

Description

technical field [0001] The invention mainly relates to the technical field of printing anti-counterfeiting, in particular to a method for double anti-counterfeiting of halftone information of microstructure dots. Background technique [0002] The vigorous development of packaging printing and the printing output of high-quality images such as reproduction of cultural relics, labels, and securities require the protection of information hiding and anti-counterfeiting technology to achieve the purpose of property rights protection and product anti-counterfeiting, and to ensure the benign circulation of commodities. Traditional printing anti-counterfeiting technologies such as paper anti-counterfeiting, ink anti-counterfeiting, and laser holography can prevent infringement to a certain extent, but it is not difficult to crack, and the processing and production costs are high; function, but it must occupy an independent area on the printed matter, which affects the integrity and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00B42D25/30
CPCB42D25/30
Inventor 王琪顾秋露陈茜
Owner NANJING FORESTRY UNIV
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