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An Adaptive Color Digital Image Blind Watermarking Method

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

Active Publication Date: 2022-04-19
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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  • An Adaptive Color Digital Image Blind Watermarking Method
  • An Adaptive Color Digital Image Blind Watermarking Method
  • An Adaptive Color Digital Image Blind Watermarking Method

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Embodiment Construction

[0041] The purpose of this invention is to provide a kind of adaptive color digital image blind watermarking method, it is characterized in that this method comprises watermark embedding and watermark extraction two concrete processes, and its watermark embedding process is described as follows:

[0042] It is characterized in that the realization of the watermark is divided into two processes of watermark embedding and watermark extraction, and the description of the watermark embedding process is as follows:

[0043] Step 1: First, divide a color host image H with a size of 512×512 into three layered host images H of red, green, and blue i , while taking each layered host image H i It is divided into 4×4 non-overlapping pixel blocks; a color watermark image W with a size of 32×32 is divided into three layered watermark images of red, green and blue. At the same time, in order to improve the security of the watermark, each Layer watermarking images are sequentially performed...

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Abstract

The invention discloses an adaptive color digital image blind watermarking method by utilizing the advantages of strong robustness of the transformation domain digital watermarking algorithm. The present invention adaptively selects different embedding coefficients in different image blocks, and modifies part of the intermediate frequency coefficients after the two-dimensional discrete cosine transform in the transform domain, thereby completing the embedding and blind extraction of the color digital watermark; in the watermark preprocessing stage , using affine transformation and Arnold transformation successively to double-encrypt the watermark, which greatly improves the security of the watermark algorithm. The invention embeds the color image watermark into the color host image, which not only has good watermark invisibility and strong robustness, but also has high security, and is suitable for the occasion of digital image copyright protection.

Description

technical field [0001] The invention belongs to the technical field of information security, and relates to high invisibility, strong robustness and high security digital watermark copyright protection of digital images. Background technique [0002] With the development and popularization of Internet technology, digital works are becoming more and more easy to obtain, copy, store and transmit, which brings great convenience to people's life, but also makes some illegal activities increasingly rampant, such as piracy, forgery, tampering and other illegal works. Behavior has seriously affected the healthy development of the Internet. Therefore, the copyright protection of digital works is imminent, and digital watermarking technology emerges as the times require. In addition, the increasingly sophisticated hacker technology makes the security of watermarking algorithms face severe challenges. Therefore, how to make full use of the advantages of transform domain digital wate...

Claims

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Application Information

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