摘要
提出一种离散小波变换(DWT)域的水印算法。在人类视觉系统自适应处理水印信息嵌入强度的基础上,对水印图引入Rssler混沌系统进行置乱,兼顾不可见性和健壮性的同时,增强了水印图的保密性。同时建立了干扰误差模型,提出了抗干扰水印提取算法。减少提取过程中干扰对嵌入水印的影响,使提取出的水印效果得到改善。实验结果表明,该算法在局部空间上抗均匀干扰的能力有明显提高。
This paper discusses on watermarking algorithm based on DWT.It scrambles image of watermark using third dimension of R？ssler system to improve confidentiality of water mark based on that watermark bits are added adaptively to the significant coefficients of subband selected by considering the Human Visual System（HVS） characteristics to raise the ability of anti-jamming at the condition that watermark can not be seen in the watermarked image.The scheme is developed for reliable extraction of watermark from distorted images using method of amendement of interference.Experiment results show that the watermarking algorithm has special anti-jamming resistance to the interference which is uniform in local space domain.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第2期177-180,212,共5页
Computer Engineering and Applications
关键词
数字水印
离散小波变换
混沌
干扰修正
digital watermarking
Discrete Wavelet Transform（DWT）
chaos
amendement of interference
