Gray-level Image Watermarking Algorithm Based on SVD in Multiwavelet Domain

A gray-level image watermarking algorithm is proposed based on SVD and DMWT.In this algorithm,the watermarking is scrambled with the Arnold transform in advance,then it is put into the middle frequency areas partly,the areas can be recived when the original image experienced 3-level DMWT,the embedding strength is decided by both characters of the watermarking blocks and the middle frequency areas.Simulation results demonstrate that the proposed algorithm has a good robustness to resist some attacks such as JPEG compression,adding noise,filter,resizing,cutting and rotation.