摘要： 提出一种基于等距映射的视频水印算法，利用等距映射把原始视频各帧投影到二维平面上并应用奇异值分解把水印信息嵌入到视频帧与其在二维平面上投影点之间的差值上。实验证明，该算法对随机噪声干扰和诸如旋转、平移、裁剪等空间同步失真的攻击以及帧丢弃、帧插入等时间同步失真具有较好的鲁棒性。

关键词: 等距映射, 水印, 奇异值分解, 鲁棒性

Abstract: A digital video watermark scheme based on Isometric Mapping(ISOMAP) is proposed. The frames are mapped to points in the two dimensional space using ISOMAP. Watermarks are embedded into the differences between the frames of video and their images under the mapping through Singular Value Decomposition(SVD). Experimental results show that it has very strong robustness against spatial desynchronization attacks such as rotating, scaling and clipping. It achieves high robustness against noises and median filtering. In addition, the scheme can resist temporal desynchronization such as frame dropping and inserting to some extent.

Key words: Isometric Mapping(ISOMAP), watermark, Singular Value Decomposition(SVD), robust

中图分类号: 

• TP301.6