Video Watermark Scheme for Resisting Collusion Attacks
Jing Li · Jisuanji fangzhen · 2013
A mathematical model was established to solve the common collusion attacks in video watermark.From this model a watermark scheme based on video segmentation was proposed: cumulative histogram was used for video segmentation,furthermore,different watermarks were embedded into different segmentations.The image's visual features and DCT coefficients of sub-region were utilized to obtain the watermark embedding locations.Local motion features were derived from every location and adjusted by a statistics model which was used as embedding strength.The watermark was embedded by spread spectrum method.Experimental results show that the watermarked video can resist to collusion,frame insertion,frame removal,non-synchronous,and MPEG-2compression attacks.