Robustness digital watermark method based on chaotic mapping and singular value decomposition

A technique of singular value decomposition and chaotic mapping, applied in image data processing, image data processing, instruments, etc.

Inactive Publication Date: 2012-08-22
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these watermarking schemes are not robust to geometric distortions (rotation, scaling, etc.)

Method used

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  • Robustness digital watermark method based on chaotic mapping and singular value decomposition
  • Robustness digital watermark method based on chaotic mapping and singular value decomposition
  • Robustness digital watermark method based on chaotic mapping and singular value decomposition

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Embodiment Construction

[0050] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] Such as figure 1 and figure 2 Shown is a flow chart of a robust digital watermarking method based on chaotic mapping and singular value decomposition of the present invention, wherein figure 1 is the flow chart of the watermark embedding process, figure 2 It is a flow chart of the watermark detection process, which specifically includes the following steps:

[0052] (S1) Watermark embedding process, which includes:

[0053] (S11) Utilize the chaotic map to permutate and scramble the n×n original image I to obtain a noise map, such as Figure 4 As shown, figure (b) is the scrambling result image of the original image figure (a) after three chaotic iterations; it passes a key vector K=(k 1 , k 2 ,...,k l ) and discrete Baker mapping to get two permutation index matrices P r and P c , where l is the length of th...

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Abstract

The invention belongs to the technical field of multimedia information security and particularly relates to a robustness digital watermark method based on chaotic mapping and singular value decomposition. The method comprises the following steps of: (1) a watermark embedding process, including the steps of: using the chaotic mapping for carrying out arrangement scrambling on n*n original images to obtain noise maps; blocking the noise maps subjected to the arrangement scrambling; carrying out singular value decomposition on each block to obtain a diagonal matrix, and embedding the watermark images into the maximum singular value of the corresponding block diagonal matrix one pixel by one pixel to complete the watermark embedding; and (2) a watermark detecting process, including the steps of: carrying out arrangement scrambling on watermark adding images by using the chaotic mapping; blocking the watermark adding images subjected to the arrangement scrambling; and carrying out singular value decomposition on each block to obtain a diagonal matrix, and using the diagonal matrix and a set quantization coefficient to obtain watermark images by calculation. The method provided by the invention has higher safety and better robustness, and the watermark embedded with images has higher robustness performance on image compression, image geometric distortion, image signal processing and the like.

Description

technical field [0001] The invention belongs to the technical field of multimedia information security, and in particular relates to a robust digital watermarking method based on chaotic mapping and singular value decomposition. Background technique [0002] With the rapid growth and widespread use of digital media on the Internet, the illegal infringement and illegal operation of digital media are rampant, so the copyright protection and certification of digital media is very important. In the initial application, the product holder often expresses the ownership relationship of the digital product through a method separate from the product, but it cannot prevent potential attackers from dealing with the digital product. In the early 1990s, digital watermarking technology was identified as an important solution to solve the above problems. The digital watermark technology embeds the authenticated information into the protected digital media, and the quality of the embedded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 卢伟孙伟戴路欧锻灏冯丙文
Owner SUN YAT SEN UNIV
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