一种利用小波对比度的图像隐藏算法

Effective information hiding scheme based on wavelet contrast

基于小波对比度,提出了一种新的迭代混合图像隐藏算法。该算法将各图像块的小波对比度绝对值之和作为视觉敏感性的测度,选取适合嵌入秘密信息的图像块;最后以迭代混合的方式将混沌置乱后的秘密图像嵌入这些图像块,成功地将256灰度级秘密图像隐藏在载体图像中。仿真结果表明该算法在实现大容量信息隐藏的同时,载密图像仍具有很好的视觉质量。

This paper proposed a novel information hiding scheme based on iterative blending and wavelet contrast. Adopted the sum of absolute values of wavelet contrasts of each image block as measurement of visual sensitivity, selected under the di- rection of this measurement, suitable image blocks and embedded the scrambled gray scale image with 256 levels into these suitable image blocks by iterative blending method. Simulation results show that the carrier image has good invisibility and the proposed scheme realizes the goal of big capability for information hiding.