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基于时空代表帧序列的视频近拷贝检测方法

Keywords: 视频近拷贝检测,时空代表帧,计序测量(OM)

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Abstract:

为了解决空域特征与时域特征只能片面地表征视频内容的问题,提出了一种基于时空代表帧序列的视频近拷贝检测方法.首先,根据帧间颜色卡方差与灰度OM(ordinalmeasurement)差别进行场景分割;其次,对分割后的视频进行降帧率操作,对于每个分割后的场景,进行分段合成,并根据加权的灰度互信息量进行筛选,得到每个场景的时空代表帧(representativeimage),并对视频代表帧提取灰度的OM、均值、标准差、对比度以及颜色分布描述子和边缘OM序列等特征;最后,对视频的特征进行对比,根据特征的相似程度来判断检测视频是否为近拷贝视频.实验结果表明,该方法具有较好的鲁棒性和检测能力.

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