A video watermark algorithm based on 3D-DWT
Jiang Tian-fa · Engineering Journal of Wuhan University · 2007
An effective video watermark algorithm is put forward by using the visible binary image as watermark based on three-dimensional discrete wavelet transform(DWT) and spread spectrum.The watermark image is pre-processed by using pseudorandom permutation.Firstly,the video sequence is divided into video shots.Then,watermark image is embedded into the 3D DWT coefficients considering the robustness and the invisibility by using a spread spectrum sequences.Experiment results show that the watermark frames are indistinguishable from the original frames and the algorithm is robust enough against common attacks,for example,the frame dropping,and the MPEG coding,etc.