Image watermarking method based on multiresolution decomposition

By multi-resolution decomposition of discrete wavelet transform, an image watermarking method based on multi-resolution decomposition is proposed. To ensure the security of the watermark and make the watermark be hard to be extracted, the watermark is scrambled with Arnold scrambling transformation before embedded into the original image. By the characteristics of multi-resolution decomposition, the decomposed watermarks of different resolution are embedded into the corresponding decomposed resolution of original image, which makes the watermark be adapted to the original image. The experimental results show not only dose the algorithm make the watermark invisible, but the imbedded watermark also has the strong robust with some usual image processing. So it is effective.