基于像素能量分布的自适应差分能量水印算法  

Adaptive difference energy watermarking based on distribution of pixel energy

作　　者：蒋兴浩[1,2] 孙锬锋[1,2] 时舒森[1] 林志高[1] 金晔[1] 

机构地区：[1]上海交通大学信息安全工程学院,上海200240 [2]上海市信息安全综合管理技术研究重点实验室,上海200240

出　　处：《解放军理工大学学报（自然科学版）》2009年第3期253-257,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60702042;60802057);国家863计划资助项目(2007AA01Z455)

摘　　要：为了提供一种新型的版权保护手段,应用于视频内容安全领域,提出了一种基于像素能量分布的自适应差分能量水印安全算法。对水印图像做置乱;根据Watson视觉模型计算出水印承载区域的可调能量阈值;然后比较该阈值与能量差的大小,以决定是否在该区域嵌入水印。实验证明,该算法在保证水印不可感知性的前提下能够避开能量差过大的区域,进而增强水印的鲁棒性。To provide a novel means of copyright protection which could be used in the field of video content security, an adaptive difference energy watermarking based on the distribution of pixel energy was proposed. The watermark image was scrambled and the power adjustable threshold of the watermark＇s bearing region based on the Watson visual model was calculated. Whether to embed watermark in the region based on the comparison of threshold and energy difference was decided. Experiments show that this algorithm can enhance the robustness by avoiding areas of large energy difference on the premise of watermark unperception.

关 键 词：Watson视觉模型 能量分布 差分能量水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]