基于视觉冗余性的图像信息隐藏

Image information hiding based on visual redundancy

信息隐藏的原理就是利用载体中存在的冗余信息来隐藏秘密对象。依据人类对于图像的视觉冗余特性研究了空域上的信息隐藏,给出了基于最低有效位(LSB)和其他多位隐藏和检测方法的算法和流程,并且通过编程实现;进一步对不同比特位隐藏效果作出定量、定性分析,从视觉冗余性角度讨论了数据嵌入位置问题;最后利用熵值评价隐藏结果。实验结果表明,该方法能够根据视觉冗余性寻找到最佳嵌入位置,将对信息隐藏技术有一定的指导作用。

The principle of information hiding is using the redundant information of the cover message to embed secret object. The spatial information hiding based on the human inherent visual redundancy to image was studied. At first, several algorithms based on the Least Significant Bits（LSB） and multiple bits of color image were presented. Moreover, the hiding results were analyzed and the embedding position according to HVS was discussed. Finally, the quality of hiding results were evaluated by the entropy values of images. Experiments show that information hiding based on visual redundancy is efficient for finding the best embedding location for different images.