Video Watermark Algorithm Based on Isometric Mapping
Nie Xiushan, Ju Liu, Fenglin Qin · Jisuanji gongcheng · 2010
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.