基于离散余弦变换的自适应盲视频水印算法

设计了一种基于离散余弦变换的自适应盲视频水印算法,先用混沌序列对水印图像加密,再将视频序列进行分帧,提取亮度分量作二维8×8DCT变换,将水印嵌入到DCT分块的低频系数中。水印的提取不需要原始视频信号和原始水印,实现了水印的盲检测。实验结果表明,水印的不可感知性很好,在抵抗椒盐噪声、高斯噪声、帧删除、帧剪切及高斯低通滤波等多种攻击时具有良好的鲁棒性。

An Algorithm of the Adaptive Blind Video Watermarking based on DCT

An algorithm of the adaptive blind video watermarking based on DCT is designed, the watermarking is encrypted by chaotic sequence, then the video signal is divided into frames, and carries on two dimensional 8--by--8 flJscrete cosine transform to the luminance component, finally the watermarking is embedded into low frequency coefficients of each block adaptively. Experimental results show that the embedded watermarking has better imperceptibility, and it has better robustness against attacks such as salt and pepper noise, Gaussian noise, frame deletion, frame shear, Gaussian low pass filtering, and so on.