一种抵抗几何攻击的视频低维流形双水印方法

提出了一种能够有效抵抗几何攻击的视频双水印方法,挖掘了一种几何形变不变量-视频低维流形,理论推导和实验验证了其几何不变性.首先根据不同视频镜头的低维流形实时生成零水印及动态水印;为了兼顾鲁棒性和透明性,将水印嵌入在大能量AVS预测残差DCT中频系数上;深入研究了视频时空三维特性,利用低维流形有效量化表征了视频运动信息,建立了包含运动特征、亮度特征及纹理特征的视觉动态掩蔽模型,以自适应控制水印嵌入强度.实验结果表明,该方法可以有效抵抗中心裁剪、不规则裁剪、行裁剪、旋转、缩放和平移等大强度几何攻击及其联合攻击,如旋转加边角裁剪、中心裁剪加旋转等,对于常规信号处理及多种视频水印攻击也具有强鲁棒性.

Video dual watermarking method for resisting geometric attacks based on low-dimensional manifold

How to resist geometric attacks is currently the focus and difficulty in video watermarking fields.This paper presents a video dual watermarking method which could effectively resist geometric attacks.The method mines a geometric deformation invariant,namely the low-dimensional manifold of video,and theoretically derives and experimentally demonstrates geometric invariance.First of all,the method generates zero-watermark or dynamic semantics watermark online according to low-dimensional manifolds of differe...