DWT-DFRFT combining image watermarking algorithm

Digital watermarking is an important technique used for copyright protection and hiding information in digital media objects. In this paper, a new digital image watermarking embedding and detecting method are presented. The algorithm made sinusoidal signal by fractional with two differential orders. The sampled signals of the differential signals were superimposed as the pseudo-random sequence which was used to scramble the watermark-image. We used DWT domain to embed the watermarking into the original image in such a way that it is imperceptible by human visual system. The proposed Discrete Wavelet Transform and Discrete Fractional Fourier Transform (DWT-DFRFT) algorithm gives best robustness over the other algorithms under these attacks.