Abstract: RST attacks are simple and effective ways to attack watermark of digital image. In this paper, an algorithm based on the Fouriermellin transform is proposed. In the embedding procedure, single full Fourier transform is applied, while the second Fourier transform is done on the middle band instead of all bands with some improvements in the transform. The algorithm efficiently reduces the complexity and avoids the image distortion induced by the interpolation. The experiment results show the method is robust against RST attacks and JPEG compression.

Key words: RST, Fouriermellin transform, image watermarking