Content Dependent Image Watermarking Using Chaos and Robust Hash

Most of the present watermarking schemes focused on achieving the robustness to common signal processing and geometrical distortions. However, there are many special attacks to watermarking introduced in recent years, such as collusion attacks, copy attacks, denoising and so on. So, how to design robust watermarking scheme against these attacks is a key step for watermarking application in practice. This paper presents a novel content dependent image watermarking using robust media hash and chaotic map. Through constructing a content dependent watermark, the proposed scheme achieves good robustness against some special attacks, which is also demonstrated in the experiments.