Microsoft Word - Robust Fractal Watermarking on Continue-bsliao

In this study, a novel fractal watermarking is proposed to enforce the robustness of data hiding against possible attack. The proposed fractal watermarking is mixed of three different approaches: inner/exterior search space, odd/even search space, and two classes of isometric search space. During watermark extraction, the watermark bit is always determined by the result of a voting mechanism on the spatial coordinate with respect to three search spaces mentioned above. Experimental result shows the proposed can react against the attack JPEG compression.