自适应二维直方图迁移的视频可逆隐写算法

Reversible Data Hiding in Videos Based on Adaptive Two-dimensional Histogram Modification

直接修改运动矢量进行信息隐藏容易导致帧间失真累积效应。文章引入参考帧间隔参数K改变P帧的参考结构,通过分析K对P帧运动矢量分布规律的影响,提出一种基于运动矢量的自适应二维直方图迁移算法。该算法在修改运动矢量时尽量保持其方向不变,使用提出的自适应策略来选择m-邻域内最优迁移中心点进行运动矢量迁移。

Directly modifying the motion vector for information hiding easily leads to the accumulation effect of inter-frame distortion.The reference frame interval parameter K is introduced to change the reference structure of the P frame and an adaptive two-dimensional histogram modification(A2DHM)algorithm based on motion vector is proposed by analyzing the influence of K on the motion vector distribution of the P frame.The algorithm keeps its directionality immovable as much as possible while modifying the motion vector.A adaptive strategy proposed by this paper is used to select the optimal migration center point(OMCP)in the m-neighborhood of zero point for motion vector modification.