Hiding and extracting method for anti-counterfeiting information with 0-degree mother set screening angle
A technology of screening angle and extraction method, which is applied in the field of hiding and extracting anti-counterfeiting information, can solve the problems of low concealment, overlap of dots, limited moving position of dots, etc., and achieve high concealment, diverse positions, and good concealment and extractive effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0086] A method for hiding and extracting anti-counterfeiting information with a master screen angle of 0 degrees, comprising the following steps:
[0087] Step 1. Select the host image and determine the hidden area
[0088] Select the host image that needs to hide anti-counterfeiting information. The host image needs to meet the following conditions:
[0089] (1), composed of m*n pixels, the color mode is CMYK (that is, composed of C channel, M channel, Y channel and K channel);
[0090] (2) At least one channel of the host image has a hidden area where anti-counterfeiting information can be set, the hidden area has s*s pixels, s is smaller than m and n, the channel where the hidden area is located is the master, and the remaining channels are 3 sub-plates, determine the position of the hidden area on the master plate, remember that all pixels in the hidden area have the same color value on the master plate, denoted as α, and the range of α is 0.1-0.5;
[0091] In this impl...
Embodiment 2
[0138] see Figure 8-11 , on the basis of embodiment 1, the differences of embodiment 2 are: (1), the host image is different; (2), the anti-counterfeiting information is text; (3), α is 0.1;
[0139] Covert evaluation:
[0140] Carrying the master plate halftone figure of anti-counterfeit information in embodiment 2 and 3 secondary plate halftone figures carry out image synthesis, obtain the host image halftone figure carrying anti-counterfeit information; Adopt SSIM (structural similarity) algorithm and WSNR (weighted Signal-to-noise ratio) to evaluate the similarity between the halftone image of the host image without anti-counterfeiting information and the halftone image of the host image carrying anti-counterfeiting information, so as to indirectly obtain the evaluation results of the concealment of hidden information, as shown in Table 3 below Show:
[0141] Table 3 Example 2 similarity evaluation results
[0142]
[0143] Wherein, the closer the value of SSIM is t...
Embodiment 3
[0150] see Figures 12 to 15 , on the basis of embodiment 1, the differences of embodiment 3 are: (1), the host image is different; (2), the anti-counterfeiting information is a graphic; (3), α is 0.25;
[0151] Covert evaluation:
[0152] Carry the master halftone image of anti-counterfeit information in embodiment 3 and carry out image synthesis with 3 sub-version halftone images, obtain the host image halftone image that carries anti-counterfeit information; Adopt SSIM (structural similarity) algorithm and WSNR (weighted Signal-to-noise ratio) to evaluate the similarity between the halftone image of the host image without anti-counterfeiting information and the halftone image of the host image carrying anti-counterfeiting information, so as to indirectly obtain the evaluation results of the concealment of hidden information, as shown in Table 5 below Show:
[0153] Table 5 Example 3 similarity evaluation results
[0154]
[0155]
[0156] Wherein, the closer the va...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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