基于整数小波的无损数据隐藏

Reversible Data Hiding Based on Integer Wavelet

介绍两种基于整数小波的无损数据隐藏方法,分别称为扩谱方法及压缩扩展方法。这两种方法均把数据嵌入到图像整数小波变换后的高频子带系数中;为防止小波反变换时图像灰度溢出问题,直方图调整技术被使用。实验结果表明,两种方法均达到甚至超过当前无损数据隐藏领域最好水平。

This paper presents two reversible data hiding methods based on integer wavelet, namely spread-spectrum method and companding method. Both methods embed data in wavelet high-frequency subband coefficients so as to achieve superior performance in terms of data embedding capacity and visual quality of marked images. To prevent the overflow and underflow problem, histogram modification is used. Experimental results show that both methods are in the best in the literature.