一种基于混沌系统和提升小波的视频水印算法

Video Digital Watermarking Algorithm Based on Chaotic Sequences and Wavelet Lifting

对压缩视频的图像帧的亮度分量进行小波提升分解,将水印数据嵌入到其低频子带的DCT系数中;利用混沌系统对水印图像进行置乱,再嵌入到原始载体图像帧中。由于置乱变换消除了水印像素间的空间相关性,使得算法的安全性和抗攻击能力进一步提高。实验结果表明,该算法易于实现,符合视频水印实时性的要求。

In this paper,the scrambled watermark is embedded in DCT coefficients of low-frequency sub image with the Brightness Component of original color image after lifting wavelet transformation.Before embedding the watermark,the image confusion method is used to eliminate the space correlation of the pixels and improvs the security and robustness.The results showed that the algorithm is easy to carry out with the real-time reqest of video watermarking.