Abstract: A video watermarking robust algorithm to geometric distortion is proposed. During the watermark embedding process, synchronization information is embedd in several frames. The algorithm takes advantage of the feature points of synchronization frame to recover the attacked digital watermarking video sequences. According to the position of feature points between the original frame and the attracted frame, the video sequences are rectified. The experiments demonstrate that this scheme can efficiently prevent temporal synchronization attacks as frame dropping, frame insertion and geometric attacks.

Key words: Spatio-temporal domain detection, Geometric attacks, Synchronization attacks, Video watermark

摘要： 提出了一种基于视频序列时空不变信息的视频水印算法。在嵌入水印时生成同步帧，并确定同步帧时空不变特征点位置，检测时根据同步帧时空不变特征点的位置，实现对视频序列几何失真的矫正，对水印信息进行检测和提取。实验表明，该算法能有效地抵抗帧插入和帧丢失等时间轴同步攻击和高强度几何攻击。

关键词: 时空域检测, 几何攻击, 同步攻击, 视频水印