摘要
提出了结合离散小波变换(DWT)和奇异值分解(SVD)的数字视频水印算法。选取规范化质心(NCG)大于阈值的视频进行分帧,利用每帧视频的DWT分解后的中频分量系数进行SVD,修改奇异值,完成二值图像水印的嵌入。提取时利用部分原始视频的边信息,实现了水印的半盲提取。仿真结果表明,该算法具有良好的不可见性,并且保证了对常见的滤波、压缩、剪切等攻击的鲁棒性。
The digital video watermarking algorithm combined DWT and SVD is proposed.The video is selected with NCG greater than the threshold as the embedded frame.Each selected frame is decomposed by DWT,then the resultant mid-frequency coefficients are decomposed by SVD.The singular values is modified to accomplish the embedding of the binary watermark.Afterwards the side information of partial original video is exploited to realize the semi-blind extraction of watermark.Simulation results show that the proposed algorithm has much transparency and can resist common attacks such as filtering,JPEG compression,cropping etc.
出处
《科学技术与工程》
2010年第33期8295-8298,共4页
Science Technology and Engineering
基金
大庆市科学技术计划项目资助
关键词
视频水印
奇异值分解
规范化质心
离散小波变换
video watermarking singular value decomposition（SVD） normed center of gravity（NCG） discrete wavelet transform（DWT）
