As for the digital image watermarking technique, the general requirements are the embedded watermark information is not visible and it has certain robustness to resist various attacks. Hence, the digital watermarking algorithm is a study of interdisciplinary field with the wavelet as a major technology for image compression. The new algorithm improved the embedding and extraction watermark and made some new attempt to solve the problem of watermarking against attacks according to different weight values of the re-decomposition in each grayscale watermark bit plan. Experimental results show that the proposed scheme has better robustness, security and invisibility.
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