Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for embedding and extracting hiding information of linear grating

A technology of hiding information and linear grating, applied in the field of image processing, can solve problems such as poor hiding effect of hidden information, and achieve the effect of improved concealment, excellent hiding performance and extraction performance.

Inactive Publication Date: 2018-12-11
HEFEI XINYADA INTELLIGENT TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of the phase modulation method, the special situation of the digital screening used in combination with it has not been fully considered. The dot generation of the phase modulation method uses the growth model method, which hides information in the application of mid-tone or dark-tone images. hides very badly

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
  • A method for embedding and extracting hiding information of linear grating
  • A method for embedding and extracting hiding information of linear grating
  • A method for embedding and extracting hiding information of linear grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] A method for embedding and extracting hidden information of linear gratings, see figure 1 , including the following steps:

[0082] Step 1. Select the host image;

[0083] see figure 1 , select the host image, the host image includes x×y pixels, color separation processing, get C, M, Y, K four channels;

[0084] Step 2. Select the host channel

[0085] Set the hidden condition, select the channel corresponding to the hidden condition as the host channel, the number of the host channel is 1, and the remaining 3 channels are regular channels;

[0086] When the host channel cannot be selected, go back to step 1 and select the host image again;

[0087] Hidden conditions include color value conditions and histogram conditions;

[0088] The selection of the host channel is to first filter the color value condition and then filter the histogram condition, including the following steps:

[0089] (1), analyze the color value

[0090] Described host image comprises x * y ...

Embodiment 2

[0124] see Figure 5-8 , on the basis of embodiment 1, the difference of embodiment 2 is:

[0125] (1), the host image is different; the host channel is M channel;

[0126] (2), the hidden information is different.

[0127] Further, the host channel halftone image in Example 2 is synthesized with three conventional channel halftone images to obtain a host image halftone image without embedded hidden information;

[0128] Using SSIM (Structural Similarity) algorithm and WSNR (Weighted Signal-to-Noise Ratio) to evaluate the similarity between the halftone image of the host image without embedded hidden information and the halftone image of the host image embedded with hidden information, so as to obtain indirectly The evaluation results of concealment of hidden information are shown in Table 2 below:

[0129] Table 2 Example 2 Concealment Evaluation Results

[0130]

[0131] Among them, in the evaluation methods in this field, the closer the value of SSIM is to 1 or the...

Embodiment 3

[0133] see Figures 9 to 12 , on the basis of embodiment 1, the difference of embodiment 3 is:

[0134] (1), the host image is different; the host channel is M channel;

[0135] (2), the hidden information is different.

[0136] Further, the host channel halftone image in Example 3 is synthesized with three conventional channel halftone images to obtain a host image halftone image without embedded hidden information;

[0137] Using SSIM (Structural Similarity) algorithm and WSNR (Weighted Signal-to-Noise Ratio) to evaluate the similarity between the halftone image of the host image without embedded hidden information and the halftone image of the host image embedded with hidden information, so as to obtain indirectly The evaluation results of concealment of hidden information are shown in Table 3 below:

[0138] Table 3 Example 3 Concealment Evaluation Results

[0139]

[0140] Among them, in the evaluation methods in this field, the closer the value of SSIM is to 1 o...

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 a method for embedding and extracting the hidden information of a linear grating, which comprises the following steps: step 1, selecting a host image; 2, selecting a host channel; 3, discretizing the host image; 4, setting hidden information. The invention is based on the principles of digital screening and linear raster, and has excellent hiding performance and extractingperformance in the raster anti-counterfeiting realization of halftone and shadow host images.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for embedding and extracting hidden information of linear gratings. Background technique [0002] At present, my country's research on printing anti-counterfeiting technology mainly focuses on printing materials (such as paper, ink, etc.) and digital anti-counterfeiting. restrictions and are therefore not widely used. Grating anti-counterfeiting technology is an anti-counterfeiting method for anti-counterfeiting processing of halftone images that has emerged in recent years. This technology has become a popular technology due to its good concealment of invisible graphics, high confidentiality, significant anti-counterfeiting effect, and no additional production costs. Research hotspots. [0003] Based on the relevant theories of digital screening technology and human visual characteristics, Liu Zhen from Nanjing Forestry University proposed a resear...

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
IPC IPC(8): H04N1/32
CPCH04N1/32256
Inventor 张玉
Owner HEFEI XINYADA INTELLIGENT TECH CO LTD