摘要
简述协同序参量的来源、定义、动力学演化方程及其特性。针对数字水印的鲁棒性要求,提出把水印模式的协同序参量作为数字水印鲁棒性的定量指标,并给出了详细的运用步骤。以图像数字水印为例,对空域水印和DCT域水印的Lena图像进行了鲁棒性实验,计算比较了模式间的协同初始序参量值,给出了相应的鲁棒性评判。从理论推导和实验计算分析,用协同序参量作为数字水印的鲁棒性评判指标,具有一定可行性和实用性。
This paper discusses briefly the origin,definition,dynamical evolvement equation and characteristic of synergetic order parameter.Aimed at digital watermark robustness,the synergetic original order parameter of watermark pattern is first advanced and looked as quantitative index of digital watermark robustness.The Lena images embedded space watermark or DCT watermark are processed by robust experiments.After procession,the synergetic original order parameter of patterns in the set are calculated and compared,and we have gotten their robust conclusion.With theoretic testify and experimental analysis,the method of using synergetic order parameter as quantitative index of digital watermark robustness has feasibility and practicability.
出处
《计算机工程与应用》
CSCD
北大核心
2005年第24期78-81,84,共5页
Computer Engineering and Applications
关键词
数字水印
鲁棒性
序参量
协同序
digital watermark,robustness,order parameter,synergetic order
