提出了一种基于经验模式分解的信息隐藏算法.将一幅索引图像分解成6个基本模式,用秘密信息代替其中一个模式重构原图后,把重构的图作为公开信息传输,最后再从重构图中提取秘密信息.利用归一化互相关函数和峰值信噪比对算法进行评定,并对含有秘密信息的图像进行攻击.结果表明,信息隐藏算法具有较好的透明性和鲁棒性.
In this paper,an information hiding algorithm based on the empirical mode decomposition is proposed. At first,the indexed image is decomposed into six IMFs. Then the secretive data instead of an IMF is embed into the recombined image without the IMF. The recombined image as a public information is transmitted after the extract secret information from the public information. Finally the recombined image is attacked and the algorithm was assessed by using the normalization function and the Peak Signal to Noise Ratio. The experimental results show that the algorithm has better robustness and transparency.