• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

计算机工程与科学

• 计算机网络与信息安全 • 上一篇    下一篇

基于超混沌和Slant变换的鲁棒水印算法

李伟岸,熊祥光,夏道勋   

  1. (贵州师范大学大数据与计算机科学学院,贵州 贵阳 550001)
  • 收稿日期:2019-08-29 修回日期:2020-01-07 出版日期:2020-05-25 发布日期:2020-05-25
  • 基金资助:

    国家自然科学基金(61762023);贵州省教育厅自然科学基金(黔学位合字ZDXK[2016]8号)

A robust watermarking algorithm based
on hyper-chaotic and Slant transform
 

LI Wei-an,XIONG Xiang-guang,XIA Dao-xun   

  1. (School of Big Data and Computer Science,Guizhou Normal University,Guiyang 550001,China)
  • Received:2019-08-29 Revised:2020-01-07 Online:2020-05-25 Published:2020-05-25

摘要:

为进一步提高水印算法的安全性和抗攻击能力,结合超混沌和Slant变换的优点,提出一种基于超混沌和Slant变换的鲁棒水印算法。首先,在隐藏水印之前采用超混沌系统对水印图像进行加密,提高了待隐藏图像的安全性;其次,将原始载体图像划分成大小为8×8的不重叠分块并对各个分块分别进行Slant变换;最后,将加密后的水印图像隐藏到Slant变换后的直流系数和中频系数中。大量的仿真结果表明,本文算法具有较好的隐蔽性,对JPEG压缩、噪声、滤波、缩放、对比度调整等攻击具有较好的抗攻击能力。与相似算法相比,本文算法具有更好的鲁棒性能。

关键词: 数字水印, 超混沌, Slant变换, 鲁棒性

Abstract:

In order to improve the security and anti-attack ability of digital watermarking algorithm, combining the advantages of hyperchaos and Slant transform, a robust watermarking algorithm based on hyper-chaotic and Slant transform is proposed. Firstly, the watermarking image is encrypted by hyper-chaotic, which improves the security of the image to be embedded. Secondly, the original cover image is divided into non-overlapping blocks of size 8×8 and the Slant transform is performed on each block. Finally, the encrypted watermarking image is embedded into the DC coefficient and the middle frequency coefficient after Slant transform. A large number of simulation results show that the proposed algorithm has better transparency and robust performance for JPEG compression, noise, filtering, scaling, contrast adjustment and other attacks. Compared with the similar algorithms, the proposed algorithm has better robust performance.
 

Key words: digital watermarking, hyper-chaotic, Slant transform, robustness