【摘要】 提出一种基于Contourlet变换的双重视频水印方案。对MPEG系统中的I帧进行Contourlet变换,利用二维离散超混沌系统产生的超混沌序列对水印图像进行置乱和加密处理。在低频域重要系数嵌入破坏原始视频水印,使其失去应用价值,同时在高频域嵌入鲁棒水印,实现版权保护。实验结果表明,只有得到授权的用户才能获得高保真的视频信息,版权保护水印提取时不需要原始视频信号。更多还原

【Abstract】 A dual video watermark scheme based on Contourlet transform is proposed.Performed Contourlet transform on I-frame in MPEG system,and srambled and encrypted watermark using hyperchaos sequence generated by simple two-dimentional hyperchaos system.Low frequency coefficients embedded destructive watermark to lose the video’s value and high frequency coefficients embedded robust watermark to protect copyright.Experimental results show that only authorized users can get high-fidelity video information and the algorithm provides a new way for video copyright protection.更多还原