Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anti-counterfeit identification embedding method based on double encrypted channels

An anti-counterfeiting mark and encryption channel technology, applied in the field of anti-counterfeiting mark embedding based on double encryption channels, can solve the problems of anti-counterfeiting parameters that have been deciphered in reverse, weak anti-attack, no multi-layer encryption anti-counterfeiting method, etc. Copy the effects of attack resistance, strong attack resistance, and difficulty increase

Inactive Publication Date: 2019-01-01
HEFEI DONGHENGRUI ELECTRONICS TECH CO LTD
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method realizes information hiding, the invisible graphics and text are only hidden on one channel, and the anti-attack is not strong. To a certain extent, there is a possibility of reverse deciphering the anti-counterfeiting parameters
[0006] In summary, most of the existing research focuses on setting anti-counterfeiting information or anti-counterfeiting marks in a single channel to improve anti-counterfeiting performance, but there is no anti-counterfeiting method with multi-layer encryption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-counterfeit identification embedding method based on double encrypted channels
  • Anti-counterfeit identification embedding method based on double encrypted channels
  • Anti-counterfeit identification embedding method based on double encrypted channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Provide a kind of anti-counterfeiting mark embedding method based on double encryption channel in this embodiment 1, comprise the following steps:

[0064] step 1),

[0065] Select the background image, the background image is a uniform image in the middle tone, such as figure 1 As shown (for the convenience of display and understanding, figure 1 is the grayscale image of the background image), convert the color mode of the background image to CMYK color mode, and decompose to obtain the image of the C channel, the image of the M channel, the image of the Y channel and the image of the K channel; the C channel and the M channel are encrypted channels, used to hide the anti-counterfeiting marks in these two channels, and the hidden anti-counterfeiting marks cannot be recognized by human eyes;

[0066] Step (2),

[0067] Set the number of screen lines and the screen angle of each channel for screen processing;

[0068] All 4 channels are screened with the same number ...

Embodiment 2

[0102] Provide a kind of anti-counterfeiting mark embedding method based on double encryption channel in this embodiment 2, comprise the following steps:

[0103] step 1),

[0104] Select the background image, the background image is an image with mid-tone and tone changes, such as Figure 4 As shown (for the convenience of display and understanding, Figure 4 is the grayscale image of the background image, Figure 4 Mainly present the texture structure of the background image), convert the color mode of the background image to CMYK color mode, and decompose the image of the C channel, the image of the M channel, the image of the Y channel and the image of the K channel; the C channel and the M channel are encrypted aisle;

[0105] Step (2),

[0106] Set the number of screen lines and the screen angle of each channel for screen processing;

[0107] The 4 channels all use the same number of screen lines for screening, and the number of screen lines is 169lpi;

[0108] The i...

Embodiment 3

[0142] In this embodiment 3, on the basis of embodiment 2, make the following difference: as Figure 9 As shown, different background images are selected and different anti-counterfeiting marks are hidden, and the rest of the parameters are the same.

[0143] With the C channel screened image, the M channel screened image, the Y channel screened image and the K channel screened image in the present embodiment 3, the background image screened image is obtained, and the structure similarity SSIM algorithm and the signal-to-noise ratio PSNR algorithm are adopted Respectively evaluate the similarity between the background image screened image in Example 3 and the background image with anti-counterfeiting marks hidden, and the calculation results obtained are shown in Table 3 below:

[0144] Table 3 Example 3 Anti-counterfeiting mark hidden performance evaluation results

[0145]

[0146] Among them, the value of SSIM is between 0 and 1. When the calculated value is closer to 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an anti-counterfeit mark embedding method based on a double encryption channel, comprising the following steps: (1) selecting a background map and an encryption channel, and converting a color mode of the background map into a CMYK color mode; (2) setting screening parameters for screening treatment; (3), selecting an anti-counterfeit mark and setting that anti-counterfeitmark in the C channel to obtain an encrypted image of the C channel; (4), setting an anti-counterfeit mark in that M channel to obtain an encrypted image of the M channel; (5), merging to obtain background map with anti-counterfeit mark. The invention is based on the principle that the image needs to be halftone processed before printing and outputting, the anti-counterfeit mark is hidden in the halftone process. Because the anti-counterfeit mark is hidden in the process of digital screening output and based on the displacement movement of the dot, this anti-counterfeit method has strong anti-attack ability, and it is difficult for the counterfeiter to decipher the screening angle and the number of screening lines on the four channels.

Description

technical field [0001] The invention belongs to the technical field of printing anti-counterfeiting, and in particular relates to a method for embedding anti-counterfeiting marks based on double encryption channels. Background technique [0002] With the rapid development of printing technology, counterfeiting and chaotic phenomena have emerged, and anti-counterfeiting printing technology has become an indispensable technical means in the printing industry. The anti-counterfeiting method based on halftone screening technology to hide graphic and text information is simple and easy, does not change the traditional printing production equipment and process, and does not increase production costs. It is an anti-counterfeiting method that has developed rapidly in recent years. The hiding of anti-counterfeiting information (such as anti-counterfeiting marks) is realized by offsetting the dot position, and the anti-counterfeiting information can be revealed after superimposing the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 齐慧
Owner HEFEI DONGHENGRUI ELECTRONICS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com