基于分割采样的小波域图像信息隐藏算法及性能分析

提出了一种结合加密技术的小波域变换图像信息隐藏算法.该方法首先利用分割采样置乱变换对待隐藏图像进行变换加密处理,并对载体图像进行多分辨率小波分解,然后根据人眼视觉特性自适应选取信息隐藏的小波变换域系数.在此基础上,将置乱加密信息乘上一个调节嵌入深度的权值后叠加到所选小波域嵌入位置,实现图像信息的自适应隐藏.实验结果表明,所提出的信息隐藏算法具有非常好的不可见性,对于大量的隐藏攻击手段具有较好的安全性和鲁棒性.

AN IMAGE HIDING ALGORITHM BASED ON DIVISION SAMPLING AND WAVELET TRANSFORM

The development of efficient image hiding algorithm is an important topic in the research field of information security.A new image hiding algorithm based on wavelet transform and encryption technology is presented in this paper.Through this algorithm,the image to be hidden is firstly transformed and encrypted with scrambling technology of division sampling proposed in this paper,and the carrier image is also decomposed with wavelet multi-resolution transformation,then the relevant wavelet transformation coefficient to be hidden information is self-adapted chosen according the human vision characteristics.Finally by multiplying the scrambled encryption image with an embedding strength factor and then encrypting them to the embedded location,the course of image information hiding can be realized.Satisfactory and effective results have been obtained by analyzing the course of the experiments with the related algorithm,especially in its invisibility and better safety and robusticity against a number of hiding information attacking methods.