一种基于离散小波变换的大容量数字图像水印算法

A large capacity digital image watermarking algorithm based on discrete wavelet transform

针对目前研究中图像水印嵌入信息量偏小的问题,提出一种基于离散小波变换的大容量数字图像水印算法。通过融合嵌入方式,将水印信息嵌入在原始图像小波分解子带中,采用不同的嵌入强度因子,确保了水印信息的不可见性。同时采用Arnold置乱映射增强算法的安全性,通过剪切、JPEG压缩、椒盐噪声攻击实验证明该算法具有较强的鲁棒性。

The question is directed towards the target of the small information embedded in image watermarking at the present time,a large digital image watermarking algorithm based on discrete wavelet decomposition is proposed in this paper.Through fusion embedded way,the algorithm puts information of watermarking into the subband of discrete wavelet decomposition,it uses different embedding strength of the factors,to ensuring the large capacity of watermarking invisible,while it uses the scrambling mapping of Arnold,to enhancing the safety of algorithm.Through shear,JPEG compressions and salt pepper noise experiments,it shows that this algorithm has strong robustness.