论文部分内容阅读
为了保护数字视频知识产权,提出一种基于视频序列空域DCT变换和时域DWT变换的数字水印算法。首先在HSV空间上对原始视频每帧做DCT变换,从中提取出亮度分量的低频系数,并对其做时间轴上的DWT得到序列的高通成份和低通成份。对水印图像做了基于混沌理论的置乱加密,通过DWT将彩色水印图像的高、低频信息多分辨地嵌入宿主视频序列中。在水印重构过程中不需调用原始视频。对所提出的视频水印算法进行了较充分的攻击测试实验,实验结果表明了本文算法具有较强的鲁棒性。
In order to protect the intellectual property of digital video, a digital watermarking algorithm based on spatial transform of DCT and DWT in video sequence is proposed. Firstly, DCT transform is performed on each frame of original video in HSV space, the low frequency coefficients of the luminance component are extracted, and the DWT on the time axis is used to obtain the high-pass and low-pass components of the sequence. The watermarking image is scrambled and encrypted based on the chaos theory. The high and low frequency information of color watermark image is embedded into the host video sequence by DWT. The original video need not be called during watermark reconstruction. The proposed video watermarking algorithm has been tested more fully. The experimental results show that the proposed algorithm is robust.