Adaptive Image Watermarking Algorithm in Contourlet Domain

In this paper, a novel watermarking algorithm using contourlet transform is proposed. The proposed algorithm takes advantage of a multiscale framework and directionality to extract the significant texture information of an image from its contourlet domain. By preserving both the robust property and the imperceptibility before and after watermarking, an adaptive watermarking scheme based on texture and luminance features in contourlet domain is proposed, which use the texture and luminance features of the image to find the embedding watermarking position. Finally, the analytical expressions are contrasted with experimental results where the robustness of the proposed watermarking system is evaluated against standard watermarking attacks.