基于视觉感知的时空联合视频拷贝检测方法

Spatiotemporal Video Copy Detection Based on Visual Perception Analyses

视频拷贝检测在视频信息检索和版权保护等方面有着重要意义.文中依据视觉感知特性,认为现有的基于单帧的拷贝检测方法未充分利用视频的时空相关性,进而在利用这一重要特性进行拷贝检测方面进行了探讨.依据自然图像序列的时空相关性以及视觉系统对时空信息的感知特性,通过对时空切片单元块Sub进行DCT分析得到与视频内容相关的时空联合特征,并基于该特征提出视频拷贝检测算法.实验表明,文中所提出的视频拷贝检测方法对视频内容变化敏感而对相同内容视频格式上的变化鲁棒,表现出优于现有方法的性能.

A novel spatiotemporal video copy detection method based on visual perception leatures is proposed in this paper. The method differs from the conventional video copy detection algorithms in that it does not using key frame based features any more. By extracting visual perception based spatiotemporal correlation of slice in frequency domain using DCT, the proposed method possesses both robustness and discriminability for video copy detection. It copes well with not only the format, resolution variation of video hut also the aspect ratio change. Even more, the method is robust to display format conversion such as adding pillar-box. The experiment results show the proposed method is effective and robust.