摘要
揭示了彩色图像相邻像素差服从或2倍近似服从广义高斯分布,且均值为零的统计规律;指出了目前常用隐写作业模式—代替作业模式在图像隐写方面的本质弱点。同时,本文针对彩色图像的空域隐写提出了一种结合稳健性统计特性和易损性统计特性为一体的快速盲检测算法,该算法检测效率高,速度快,便于实用。
A new spatial stego-detecting algorithm is proposed. The algorithm which detects LSB embedding in color image is based on both robustly and fragilely statistical characteristics. It has a high detecting speed and can be implemented conveniently. Not only it has a good extension but also its parameters can be easily adjusted. Meanwhile, the article indicates some statistical regularity of natural color images such as the difference of one pixel and its adjacent pixels which obeys the generalized Gaussian distribution(GGD), with zero mean value. It also indicates the essential difference of bit-replacement and arithmetic addition.
出处
《通信学报》
EI
CSCD
北大核心
2004年第2期33-42,共10页
Journal on Communications
基金
国家"973"重点基础研究发展规划基金资助项目(TG1999035804)
关键词
信息隐藏
TAP算法
广义高斯分布
隐写检测算法
information hiding
TAP algorithm
generalized Gaussian distribution
stego-detecting algorithm
