A Zero-Watermark Technology with Strong Robustness
Yang Yi-xian · Beijing Youdian Xueyuan xuebao · 2010
In order to enhance the robustness of roust watermark technology,a zero-watermark technology is proposed based on discrete wavelet transformation(DWT) and singular value decomposition(SVD).It conducts DWT with the original image,divides its low frequency band into blocks,and conducts SVD with every block.Zero-watermark is derived by judging the parity of the first digit of the biggest singular value in every block.Experiments show that it possesses strong robustness against various attacks.