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-  2017 

基于熵的视频运动矢量隐写分析算法 Motion Vector Steganalysis Algorithm Based on Entropy

Keywords: 信息隐藏,运动矢量,隐写,隐写分析,信息熵

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Abstract:

利用运动矢量隐写对相邻运动矢量相似性的扰乱作用,提出一种基于信息熵的视频运动矢量隐分析算法.在视频帧的滑动窗口中选取运动矢量,并分别对水平分量H、垂直分量V、方向D以及长度L等4个系数进行熵值计算以描述相似度.通过移动帧内滑动窗口位置,计算各窗口内运动矢量的熵均值矩阵,构造了16维的运动矢量HVDL特征.为了评估本文HVDL特征的表现,将HVDL与AoSO对比,对不同时期4种嵌入算法的样本进行了隐写分析实验,实验结果表明HVDL对当前安全性更高的隐写算法的检测准确率比AoSO高,且特征运行速度更快

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