中文摘要：

提出了一种基于内容的抗线性共谋攻击的视频水印算法。根据图像的视觉特征以及区域DCT系数的关系，选择水印嵌入区域。利用局部JND（just-noticeable distortion）值，得到一种自适应的基于视觉内容的扩频水印方案。实验结果表明，该水印方案能有效地抵抗第一类和第二类线性共谋攻击，具有较强的顽健性、稳定性和视觉不可见性。

英文摘要：

A content dependent video watermark algorithm for resisting linear collusion attacks was presented. The image＇s visual features and DCT coefficients of sub-region were utilized to select the watermark embedding locations. Moreover the mechanism of JND（just-noticeable distortion） was used to adjust the embedding strength of proposed algorithm. These components may be then used as building blocks to construct a self-adaptive content dependent spread spec- trum watermark solution. Experimental results have been shown that the performance of the proposed strategy can resist effectively two types of linear collusion attacks while still being robust, stable and imperceptible.