statistic error meaning in English

统计误差

In the third part , the essences of steganography and disadvanges of common visual perception evaluation , such as psnr and wpsnr are studied . based on analysis local error that is introduced by embedding information , combining hvs , three objective perception evaluation method for steganography performance are proposed , which are based on human visual systems and local statistic error distribution respectively . in the steganalysis part , a steganography security statistic attack model and methods for some steganography methods are presented
在信息隐藏的性能评价方面，研究了常用的峰值信噪比，加权峰值信噪比等前人提出的感知性能评价准则，指出针对信息隐藏的性能评价不能单纯从视觉特性出发，提出从信息隐藏的数据特性和感知特性出发，结合局部特性来考察失真误差的变化的思想，并据此提出基于局部区域误差统计分布和视觉掩模方法评价信息隐藏性能的方法。