摘要
针对现有基于频域的数字水印算法在实施大容量嵌入上的不足,提出了基于S盒的信息隐藏方法研究,用于实现图像大容量嵌入传输。首先对最原始的水印图像进行非线性秘密替换,不仅起到加密的效果,同时起到无损压缩的效果;然后对载体图像进行二级离散小波变换,并且对低频子带进行分块奇异值分解;最后将非线性替代变换后的水印图像嵌入到每块奇异值中。实验结果表明,该算法具有良好的不可见性和安全性,具有较强的抵抗添加高斯噪声、添加椒盐噪声、剪切的鲁棒性,最终实现大容量秘密信息的通信。
For the insufficiency of the existing digital watermark algorithm based on frequency domain on the im- plementation of large capacity embedding, a new scheme of information hiding based on S box was proposed and was used in the large capacity embedded image transmission. First of all, the original watermark image is nonlinear secretly replaced. In this way, not only have the effect of encryption, but also have the effect of lossless compression. Then do the secondary discrete wavelet transform of carrier images. And process the low frequency sub band by singular value decomposition. At last embed the watermark image in each singular value after nonlinear alternative transformation. The experimental results show that the algorithm has good invisibility and security, and has stronger resistance to Gaussian noise and shear robustness. Finally realize the large capacity of secret information communication.
出处
《激光杂志》
北大核心
2017年第12期134-137,共4页
Laser Journal
基金
国家自然科学基金项目(61572444)
关键词
非线性替代
离散小波变换
奇异值分解
无损压缩
nonlinear alternative
discrete wavelet transform
singular value decomposition
lossless compression
作者简介
侯峰（1983-），女，河南郑州人，学士，实验师，主要研究领域：数字图像处理；;李喜艳（1983-），女，博士研究生，讲师，主要研究领域：数字图像处理，xiyanli2006@163．com.
