基于Walsh序列扩频的图像信息隐藏  

Image information hiding based on walsh sequence spread spectrum

作　　者：邵菲[1] 花俊[2] 

机构地区：[1]装备指挥技术学院士官系,北京101416 [2]卫星海上测控部技术部,江阴214431

出　　处：《国外电子测量技术》2009年第8期32-34,41,共4页Foreign Electronic Measurement Technology

摘　　要：为了提高在高噪声条件下信息隐藏的可靠性,提出了一种将Walsh序列用于信息隐藏的嵌入算法,利用5-32Walsh序列的特性,以多位二进制信息为单位对嵌入二值图像进行扩频调制,然后将调制信号替换载体图像离散余弦变换域的低频系数。Walsh序列的应用使算法可以采用较长的扩频序列,从而提高了鲁棒性。实验表明,该算法在低信噪比的信道条件,具有较强的优势。An information hiding algorithm using Walsh sequence was proposed in order to improving the information security when the noise was high. By exploiting the characteristics of 5-32 Walsh sequence, the binary image was modulated with multi-bit binary information regarded as a unit, and then replaced low frequency components of original image in discrete cosine transform domain. Thus, the longer spread spectrum sequence could be used and the robustness accordingly enhanced by utilizing Walsh sequence. Experimental results show that this scheme is more robust when the channel has low ratio of signal and noise.

关 键 词：信息隐藏 Walsh序列 扩频 

分 类 号：TN911[电子电信—通信与信息系统]