静止图像的信息隐藏容量研究

The Study on the Capacity of Information Hiding System on Still Images

信息隐藏容量的计算和估计是信息伪装领域中的最困难问题之一。该文从编码和集合论的角度考察了离散情形下静止图像的信息隐藏容量的计算和性质,给出了相关的定义和计算方法,并给出了在无攻击者条件下静止图像的信息隐藏容量只与失真限制和图像数据源的概率分布有关的结论。进一步,还给出了有攻击者情形下的隐藏容量的相关结果。

To evaluate and calculate the capacity of information hiding system is a crucial topic of the field. From the point of view of the coding theory and set theory, this paper suggest a methodology for calculating the capacity of information hiding system on still images in a discrete case, meantime, some definitions are given and a conclusion that the capacity in the condition of no attackers is only related to the distortion function and the PMF(Probability Mass Function) of the source data is drawn out. Furthermore, the results of the capacity of information hiding in the case with attackers are given also.