一种平移量可控的直方图平移可逆信息隐藏算法

A reversible data hiding algorithm with controllable histogram translation

针对在视频可逆信息隐藏技术中,传统的直方图平移算法存在嵌入信息后视频码率变化大,以及在高保真要求下嵌入容量受限等问题,设计了一种平移量可控的直方图平移的可逆信息隐藏算法。首先,通过分析宿主视频,构建一组数列;然后,将数列与系数模拟相加,形成可控的直方图;最后,在新的可控的直方图上,通过平移嵌入信息。在平移量最小的条件下,对7段视频进行理论分析及仿真实验,最终所得的实验值与理论值误差在19%以内。通过与传统直方图算法的比较得出,所提算法不同嵌入容量下的平移量最大可降低26%,信噪比平均提高0.38,比特增长率平均下降1.75。实验结果表明:所提算法降低了码率的增加,增加了嵌入容量;同时在直方图较为平滑的视频片段中,结构相似性和信噪比均有较大提高,展现出较好的不可见性。

In order to solve the problems of the traditional histogram translation algorithm in video reversible data hiding technology,such as the large change of video bit rate after embedding information,and the limited embedding capacity under the requirement of high video quality,a reversible data hiding algorithm with controllable histogram translation was designed.Firstly,a set of sequences was constructed by analyzing the video cover.Secondly,the number sequence and coefficient simulation were added to form a controllable histogram.Finally,the information was embedded in the new controllable histogram through translation.Under the condition of minimum translation,7 video clips were analyzed theoretically and simulated,and the error between the final experimental value and the theoretical value was within 19%.Compared with the traditional histogram translation algorithm,the proposed algorithm can reduce the maximum translation amount by 26%,increase the peak signal-to-noise ratio by 0.38 on average,and reduce the bit growth rate by 1.75 on average.Experimental results show that the proposed algorithm reduces the increase of bit rate and increases the embedding capacity.At the same time,in the video clips with smoother histograms,the structural similarity and signal-to-noise ratio are greatly improved,showing better invisibility.