压缩域快速视频拷贝检测算法

Rapid video copy detection on compressed domain

为了在大规模数据下有效提升拷贝检测速度,提出了一种压缩域视频拷贝检测算法,采用2级匹配框架,利用压缩域上DCT系数顺序度量特征进行相似度匹配,显著减少了查询视频解码操作;并为DCT系数顺序度量特征建立倒排索引,以加快第一级匹配的速度。实验结果表明,与已有的算法相比,所提出算法在保持相当的检测精度条件的同时,大幅提升了检测速度。

To reduce the detection time efficiency under large scale data environment, a rapid algorithm was proposed on compressed domain using a two-level hierarchical detection scheme. The ordinal measures of DCT coefficients were adopted as visual features for similarity-matching in order to reduce the computational load in video decoding. Inverted indexing structure was used to accelerate the first level detection process. The experiment results show, compared with the previous algorithm, the algorithm can improve the detection speed obviously with the similar detection precision.