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Information hiding anti-fake method based on microstructure screen dots

A technology of information hiding and microstructure, applied in image data processing, instruments, image data processing, etc., can solve the problems of unclear and complete information extraction effect, poor visual secrecy, etc., and achieve good visual secrecy effect, high anti-counterfeiting performance, The effect of clear and complete information

Active Publication Date: 2016-04-20
SHAANXI UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an information hiding anti-counterfeiting method based on microstructure dots, which uses special dots with artistic effects to hide encrypted information, and solves the problem of poor visual secrecy and unclear and complete information extraction effect of existing anti-counterfeiting methods question

Method used

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  • Information hiding anti-fake method based on microstructure screen dots
  • Information hiding anti-fake method based on microstructure screen dots
  • Information hiding anti-fake method based on microstructure screen dots

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Embodiment

[0052] Now take the 30% and 20% grayscale images respectively hiding text and image information and the hidden effect in the 45° screen as examples to specifically illustrate the specific application process of the information hiding anti-counterfeiting method based on the microstructure dots of the present invention.

[0053] (1) The dot shape design of the threshold matrix unit: when the screen line angle is 0°, the threshold matrix size is 144, and the maximum threshold value is 144. Arrange the thresholds in the matrix according to the shape of the letter "A", and design from the inside out The threshold value increases sequentially. When the line angle is 15° and 75°, the maximum threshold is 153, which is designed according to the shape of the letter "U". The same method is used to design the dot shape at 45°. The effect of the enlarged dots after the design is as follows: Figure 2-a , 2-b , 2-c, 2-d shown.

[0054] (2) Halftone processing of the carrier image: Desi...

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Abstract

The invention discloses an information hiding anti-fake method based on microstructure screen dots, and the method comprises the steps: carrying out the outward diffusion from an origin of coordinates according to a screening angle needed by a loaded image; obtaining stepped threshold value matrix units which can be in seamless joint; designing the shape of screen dots; carrying out the halftone processing of the loaded image through employing image processing software; enabling to-be-hidden information to be loaded into a processed image; carrying out the fine movement of pixels covered by the hidden information, and completing the hiding of information; and finally implementing information reproduction through employing a corresponding hiding display tool. The method is good in visual secrecy effect, is high in anti-fake performance, and is clear and complete in extracted information.

Description

technical field [0001] The invention belongs to the technical field of printing digital screening, and in particular relates to an information hiding and anti-counterfeiting method based on microstructure dots. Background technique [0002] With the rapid development of science and technology, the popularization of high-precision printing equipment, the phenomenon of piracy and infringement of various printed materials is increasing, especially negotiable securities such as bills and coupons, which not only cause huge economic losses but also disrupt social order. Therefore, the application of anti-counterfeiting technology in printed matter is becoming more and more important. At present, printing anti-counterfeiting technology mainly relies on equipment and materials, etc., which will not only increase the production cost of products, but also put forward higher requirements for production technology and equipment, so that the wide use of technology is subject to certain r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0071G06T2201/0203
Inventor 郭凌华任龙飞邢铁豆刘国栋
Owner SHAANXI UNIV OF SCI & TECH
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