信息隐藏与检测算法的特性分析

Performance Analysis on the Algorithms of Information Hiding and Extracting

本文从系统模型的角度研究了信息隐藏与检测的问题 ,提出了用参数估计理论来衡量信息提取算法的优劣 .同时 ,用信息隐藏中常用的两种算法和四种应用环境为例 ,推导了参数估计的方差下限 ,并且用仿真结果验证了理论结果 ,同时得到了对应的信息提取算法为最佳估计算法的结论 .

The problem of information hiding and extracting is studied in the perspective of system model. An approach is proposed to measure the performance of information extracting algorithms by using the estimation theory. The Cramer-Rao Lower Bounds (CRLB) are derived for four algorithms of information extracting and the simulation results are given to corroborate the analysis.