Multipurpose image watermarking algorithm based on chaos and DWT

doi:10.3778/j.issn.1002-8331.2008.23.026

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (23): 83-85.DOI: 10.3778/j.issn.1002-8331.2008.23.026

• 研发、设计、测试 • Previous Articles Next Articles

Multipurpose image watermarking algorithm based on chaos and DWT

GUO Rui¹,ZHU Cong-xu^1,2

1.School of Information Science & Engineering，Central South University，Changsha 410083，China
2.Guangdong Province Key Lab of Electronic Commerce Market Application Technology，Guangzhou 510320，China

Received:2007-10-18 Revised:2008-01-21 Online:2008-08-11 Published:2008-08-11
Contact: GUO Rui

基于混沌的DWT域多功能图像数字水印算法

郭锐¹,朱从旭^1,2

1.中南大学信息科学与工程学院，长沙 410083
2.广东省电子商务市场应用技术重点实验室，广州 510320

通讯作者: 郭锐

Abstract

Abstract: In this paper，a multipurpose image watermarking algorithm based on chaos and DWT（Discrete Wavelet Transform） is proposed.The original watermark is divided into the robust watermark and the semi-fragile watermark for copyright protection and image authentication.According to different applications，the robust watermark is also divided into two kinds of watermark，one has small capacities and relatively high robustness，the other has large capacities and relatively low robustness.They are embedded to different parts of DWT domain，so is the semi-fragile watermark.The security of the watermarks is enhanced by utilizing general cat map to scramble the robust watermark and using Logistic chaotic system to generate the semi-fragile watermark.Simulation results show that watermarked images have good visual quality，the robust watermark can resist common image processing operations，and the semi-fragile watermark can detect and localize precisely the content tampers.

Key words: multipurpose image watermarking, copyright protection, image authentication, chaos

摘要： 提出了一种基于混沌的DWT域多功能图像数字水印算法。原始水印分为鲁棒水印和半脆弱水印，分别用于版权保护和图像认证。根据不同的应用，鲁棒水印又分为容量小但鲁棒性要求相对高和容量大但鲁棒性要求相对低的两种，它们和半脆弱水印分别嵌入DWT域的不同部分。并利用广义猫映射置乱鲁棒水印和Logistic混沌系统生成半脆弱水印以提高安全性。实验表明，嵌入水印后的图像视觉质量好，其中鲁棒水印能抵抗各种常规图像处理，半脆弱水印能准确地检测并定位内容篡改。

关键词: 多功能图像数字水印, 版权保护, 图像认证, 混沌

GUO Rui¹,ZHU Cong-xu^1,2. Multipurpose image watermarking algorithm based on chaos and DWT[J]. Computer Engineering and Applications, 2008, 44(23): 83-85.

郭锐¹,朱从旭^1,2. 基于混沌的DWT域多功能图像数字水印算法[J]. 计算机工程与应用, 2008, 44(23): 83-85.

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Multipurpose image watermarking algorithm based on chaos and DWT

基于混沌的DWT域多功能图像数字水印算法

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