一种视频图像的自适应水印新算法

随着计算机和网络技术的快速发展，数字水印技术正成为一种数字煤体知识产权保护的有效方法，本文提出一种视频自适应水印新算法，它直接对压缩后的视频数据流进行操作，将水印信息嵌入到运动矢量上，根据待嵌入的水印住处和运动矢量的特征矢量，新算法自动调整嵌入方案，使得嵌入水印后的图像质量损失达到最小，水印的提取算法具有盲检功能，并且新算法与视频标准有很好的兼容性，实验结果表明，算法简单有效。

A new adaptive algorithm for digital video watermarking

With the fast development of computer and network techniques, digital watermarking is becoming an efficient method for protecting the intellectual property rights of digital products. In this paper, a new adaptive watermarking algorithm is proposed for video image coding. Operating the compressed video data-stream directly, watermark information is embedded into motion vectors. According to watermark information and the feature of motion vector, the new algorithm can adaptively select embedding schemes to get good quality of watermarked-im-age. Moreover, watermark is blindly extracted in the algorithm. Experimental results show that the proposed algorithm is very simple and efficient and has a good compatibility with compression standard.