Robust Watermarking of Gray Scale Images by Using Synchronization Templates

Digital watermarking has been proposed as a method for discouraging illegal copying and distribution of copyrighted material. Many proposed methods in digital watermarking are not robust against geometrical attacks. This paper presents a new algorithm that improves the robustness of watermarking methods against geometrical operations. We briefly described affine transformation and its major properties too. Finally, we also present results, which verify the enhanced robustness of proposed algorithm against geometrical attacks.