为了对数字视频进行版权保护,结合人眼视觉特性和骑士巡游相关原理,提出一种在视频I帧亮度分量的DWT-SVD域嵌入水印的算法。先根据视觉特性计算嵌入强度,然后对I帧做离散小波变换和分块奇异值分解,再按骑士巡游路径将水印嵌入到分块奇异值分解后的U矩阵中。提取水印时不需要原始视频的参与。实验结果表明算法具有良好的不可见性和鲁棒性。
In order to protect the copyright of digital video, combining with the related principles of human visual features and knight' s tour, we present an algorithm which embeds watermarking into DWT-SVD domain of video I-frame luminance components. Firstly, the embedding strength is calculated according to the visual features. Then, the I-frames are applied DWT and blocking SVD. Furthermore the watermark is embedded into the U matrix with blocking SVD performed according to the route of knight' s tour. Watermarking could be extracted without the original video. Experimental results demonstrate the invisibility and robustness of the algorithm.