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High PSNR fragile watermarking method based on chaos theory

A technology of fragile watermarking and chaos theory, which is applied in the field of image processing and can solve problems such as insufficient security and distortion of original image content.

Inactive Publication Date: 2017-02-15
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are three deficiencies in this scheme: 1. Not safe enough
Because during the compression process, the image block vector is replaced by its nearest codeword, the original image content will be distorted to a certain extent

Method used

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  • High PSNR fragile watermarking method based on chaos theory
  • High PSNR fragile watermarking method based on chaos theory
  • High PSNR fragile watermarking method based on chaos theory

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Embodiment Construction

[0064] The principle of the present invention is as follows,

[0065] The present invention provides a high PSNR fragile watermarking method based on chaos theory, which comprises the following steps:

[0066] S1. Embedding a watermark in the original image;

[0067] S2, sequentially extracting the watermark from the image embedded with the watermark, tampering with the location, and performing image restoration.

[0068] Optionally, in the high PSNR fragile watermarking method based on chaos theory described in the present invention, the step S1 includes:

[0069] S11, dividing the original image into blocks and obtaining recovery data through VQ;

[0070] S12. Scrambling and blocking of the original binary watermark;

[0071] S13. Merge the recovered data and the original watermark to obtain a bit plane with a size of 512×512, and then scramble it;

[0072] S14. Obtain the detection plane according to the first 7 MSB planes of the original image, and perform a bit-to-bit...

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Abstract

The invention provides a high PSNR fragile watermarking method based on a chaos theory. The method includes the following steps of S1 embedding a water mark into an original image; and S2 extracting the water mark from the image embedded with the water mark, changing the position, and recovering the image. The high PSNR fragile watermarking method overcomes all the defects in the original scheme, and meanwhile the storage space required for the watermark does not increase, so that high PSNR can be maintained. The chaotic mapping is used for guaranteeing the safety; a block division theory is used for improving the change area and creating the storage space of recovering the data; and the recovery result of the target image is improved by the edge matching method based on VQ. An experiment shows that the method is safe and effective, and the recovery capability is satisfactory.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a high PSNR fragile watermarking method based on chaos theory. Background technique [0002] Digital image is one of the most common digital media in daily life, but it is facing a series of security threats, such as image processing, tampering, and distribution with the help of tools. Watermarking is often used to protect the security of images at this level [1-5] ([1] Naderahmadian Y, Hosseini-Khayat S (2014) Fast and robust watermarking in still images based on QR decomposition (still images based on QR decomposition Fast robust watermarking). Multimedia Tools and Applications 72(3): 2597-2618; [2] Tsai HH, Jhuang YJ, Lai YS (2012) An SVD-based image watermarking in wavelet domain using SVR and PSO (a SVD-based Wavelet domain image watermarking using SVR and PSO). Applied Soft Computing12 (8): 2442-2453; [3] Weng SW, Pan JS (2014) Reversible watermarking based on mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 李名孙林张恩李瑞萍王伟
Owner HENAN NORMAL UNIV
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