A Digital Watermarking Algorithm for Images Based on DWT and SVD
Jianhui Li · Jisuanji fangzhen · 2008
A new digital image watermarking algorithm based on Disperse Wavelet Transform and Singular Value Decomposition is proposed.The first step is to encrypt the watermarking image.Then,using Disperse Wavelet Transform to analyze the original image.At the end,based on block Singular Value Decomposition,a new algorithm for embedding the watermarking into the low frequency part is proposed.Compared with other similar watermarking algorithms reported in the literatures,the experiment based on this algorithm demonstrates that the watermark is robust to the geometry transform(rotate,crop)and the common signal processing techniques including salt and pepper noise.