Self-adaptive color digital image blind watermarking method

A digital image, blind watermarking technology, applied in the field of information security

Active Publication Date: 2020-12-01
南京物盟信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the increasingly sophisticated hacker technology makes the security of the watermarking algorithm face severe challenges.

Method used

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  • Self-adaptive color digital image blind watermarking method
  • Self-adaptive color digital image blind watermarking method
  • Self-adaptive color digital image blind watermarking method

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Embodiment Construction

[0041] It is an object of the present invention to provide an adaptive color digital image blind watermark method, characterized in that the method includes two specific processes of watermark embedding and watermark extraction, and the watermark embedding process is as follows:

[0042] Wherein the watermark is divided into two watermark embedding and watermark extraction process, which watermark embedding process is described as follows:

[0043] Step: First, a color host image size of 512 × 512 H Divided into red, green, blue three hierarchical host images H i At the same time, each layered host image H i Is divided into non-overlapping pixel blocks of 4 × 4; color watermarked image a size of 32 × 32 W Divided into red, green, blue three layered watermark images, at the same time, in order to improve the safety of watermark, the key based on each layered watermark image is performed Ka i Solifery transformation and key based on key KB i Arnold transformation, get three layered ...

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Abstract

The invention discloses a self-adaptive color digital image blind watermarking method by utilizing the advantage of high robustness of a transform domain digital watermarking algorithm. According to the method, different embedding coefficients are adaptively selected from different image blocks, and part of intermediate frequency coefficients after two-dimensional discrete cosine transform are modified in a transform domain, so that embedding and blind extraction of the color digital watermark are completed; in the watermark preprocessing stage, affine transformation and Arnold transformationare sequentially used for carrying out dual encryption on the watermark, and the safety of a watermark algorithm is greatly improved. According to the method, the color image watermark is embedded into the color host image, so that the method not only has better watermark invisibility and stronger robustness, but also has very high safety, and is suitable for occasions of digital image copyright protection.

Description

Technical field [0001] The present invention belongs to the field of information security technologies, and the highly unacceptability of digital images, strong robbers, high security digital watermark copyright protection. Background technique [0002] With the development and popularity of Internet technology, digital works are increasingly acquired, copy, store, and transfer, bringing people's lives to make some illegal acts, piracy, forgery, tampering and other illegal Behavior has seriously affected the healthy development of the Internet. Therefore, the copyright protection of digital work is imminent, and the digital watermarking technology came into being. In addition, increasing hacker technology makes the safety of the watermark algorithm face severe challenges. Therefore, how to make full use of the advantages of transform domain digital watermarking algorithms, a color image digital watermark algorithm that is invisible, strong robustness and high safety, has become o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0028G06T2201/0052
Inventor 苏庆堂袁子涵刘得成张雪婷王环英
Owner 南京物盟信息技术有限公司
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