Angle quantification index modulation image watermarking system and method based on compressed sensing technology

A quantitative index modulation and compressed sensing technology, which is applied in the fields of information hiding and image processing, can solve problems that have not been raised, and achieve the effects of being difficult to crack, good watermark invisibility, and embedding and extraction

Active Publication Date: 2018-11-06
SOUTHEAST UNIV
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Problems solved by technology

However, the angle quantization index modulation watermarking f

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  • Angle quantification index modulation image watermarking system and method based on compressed sensing technology
  • Angle quantification index modulation image watermarking system and method based on compressed sensing technology
  • Angle quantification index modulation image watermarking system and method based on compressed sensing technology

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Embodiment 1

[0064] Such as figure 1 As shown, the present invention proposes an angle quantization index modulation image watermarking system based on compressed sensing technology, including an observation matrix module, a watermark embedding module, an information transmission module, and a watermark extraction module:

[0065] The module for constructing the observation matrix is ​​configured to perform the following actions: use the chaotic sequence to construct a partial sparse matrix, and output the constructed sparse random measurement matrix as the observation matrix to the watermark embedding module; at the same time, use information such as the initial value of the chaotic sequence as the key 1 , and send the key information to the watermark extraction module;

[0066] The watermark embedding module is configured to perform the following actions: divide the carrier image into non-overlapping small blocks, perform signal observation on each block according to the observation matr...

Embodiment 2

[0070] Such as figure 2 As shown, the present invention also proposes an angle quantization index modulation image watermarking method based on compressed sensing technology, and the specific steps are as follows.

[0071] 1) Build the observation matrix:

[0072] 1.1) Determine the initial value z of the chaotic sequence 0 And the Logistic parameter μ to generate the Logistic sequence z n ;

[0073] 1.2) Determine the starting point z k and the sampling interval t, for z n Sampling, total sampling m×B 2 elements;

[0074] 1.3) Sequentially select m elements of the sampling sequence as each column of the observation matrix, and generate a size of m×B 2 The observation matrix Φ B ;

[0075] 1.4) For Φ B The elements in each column are sorted according to size, and the largest d elements are set to 1, and the remaining elements are set to 0;

[0076] 1.5) Set the initial value z 0 , starting point z k And the sampling interval t is used as the key 1 for watermark e...

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Abstract

The invention discloses an angle quantification index modulation image watermarking method based on a compressed sensing technology. A chaotic sequence is adopted to construct a sparse random measurement matrix as an observation matrix, and a compressed sensing technology and an angle quantification index modulation algorithm are utilized to safely and snugly embed watermark information into a compressed sensing domain of a carrier image. The invention also provides an angle quantification index modulation image watermarking system based on a compressed sensing technology. The system includesan observation matrix constructing module, a watermark embedding module, an information transmission module and a watermark extracting module. According to the angle quantification index modulation image watermarking method and system based on a compressed sensing technology, the watermark information is embedded into the compressed sensing domain of the carrier image through the angle quantification index modulation algorithm at a sending end, related information of the observation matrix and the embedding position of the watermark serve as a key to be sent to a receiving end, watermark extraction is realized, the advantages of good concealing property, high security and the like are achieved, and very high robustness is shown when conventional watermark attacks such as noise, filtering,image compression, amplitude scaling and the like are resisted.

Description

technical field [0001] The invention relates to an image watermarking system and method, belonging to the technical fields of information hiding and image processing. Background technique [0002] Digital watermarking adds certain digital information to digital media information in order to protect the copyright of digital media. Generally speaking, digital watermarking has three main characteristics: fidelity, robustness and capacity. The quantization index modulation algorithm has become one of the most popular robust watermarking algorithms because it can effectively compromise these three characteristics, but the quantization index modulation algorithm is extremely vulnerable to amplitude scaling attacks. On this basis, an angle quantization index modulation algorithm is proposed to improve the robustness against amplitude scaling attacks, however, angle quantization index modulation is vulnerable to Gaussian white noise. [0003] The idea of ​​compressed sensing was p...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/005
Inventor 张毅锋孙一博夏添刘袁
Owner SOUTHEAST UNIV
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