像素差自适应隐写方案

摘要

提出了一种新的基于相邻像素差的自适应隐写算法.该算法结合图像位平面性质以及人眼对像素值起伏剧烈的区域敏感性较差的视觉特性,根据相邻像素高五位比特值之差的不同选择不同的嵌入策略,通过改变每对像素的最低三位比特值实现信息嵌入.通过理论分析和实验证明,该算法具有较高的嵌入容量,具有良好的隐写安全性,同时算法复杂度低,实现简单.%This paper proposed a new adaptive steganographic algorithm based on pixel-value differences between adjacent pixels. The algorithm realized embedding messages by combing the nature of image bit-planes with the human vision quality that eyes were not sensitive to the area where pixels changed frequently and acutely. It chose different embedding strategies according to the differences between the first five bit planes of two adjacent pixels, and modified the last three bit planes of them. Through the theoretical analysis and the experiment results, it proves that the algorithm can obtain high capacity and obtain strong steganography security. Besides,the algorithm has low complexity and can be easily realized.