一种基于元胞自动机的安全多重图像水印算法  

Secure multiple image watermarking based on cellular automata

作　　者：金军[1] 舒红平[2] 

机构地区：[1]四川大学计算机学院,四川成都610065 [2]成都信息工程学院计算机系,四川成都610041

出　　处：《西安电子科技大学学报》2010年第1期174-180,共7页Journal of Xidian University

基　　金：四川省青年科技基金资助项目(06ZQ026-054)

摘　　要：提出一种多重图像水印算法,利用元胞自动机和元胞自动机变换丰富复杂的性质增强水印安全.将图像分割成不重叠的子块,由混沌序号序列决定一个子块中将嵌入哪个图像水印,通过水印私钥对水印进行置乱加密和对子块进行二维元胞自动机变换,然后在低频系数中量化嵌入加密水印.实验结果表明,提出的算法有很好的安全性、不可见性和鲁棒性,多个水印的嵌入和提取互不干扰.This paper proposes a multiple watermarking algorithm, which can enhance watermark security by utilizing the abundance and complexity of the nature of cellular automata and cellular automata transforms. The image is divided into non-overlapped blocks. A chaotic sequence number list decides which watermark will be embedded into a block. We encrypt the watermark and perform 2-D cellular automata transform on block with the private key, and embed the encrypted watermark into the low frequency coefficients of the block. Experimental results indicate that the proposed method is secure, robust and invisible, and that the embedding and extracting of watermarks do not interfere with each other.

关 键 词：数字水印 安全性 元胞自动机 元胞自动机变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]