The M-band wavelets in image watermarking
Multi-band (M-band) wavelet domain presents a novelty to host the watermark. In this paper, a new family of M-band wavelets, which is symmetric and parameterized with a variable /spl lambda/, is proposed and applied to image watermarking. The parameter /spl lambda/ also can be used as a key in watermark detection to improve the security of watermark. The multi-resolution analysis (MRA) of M-band wavelet transform, integrating with the CDMA (code division multiple access) encoding techniques is studied and employed to watermarking. The security, imperceptibility, and the robustness against JPEG compression and Gaussian noise, are analyzed for the proposed watermarking scheme. The experiments of watermarking based on M-band wavelet transform provide more encouraging results than those based on 2-band wavelets.