<bold>A Robust Blind Image Watermarking Scheme Based on Feature Points and RS-invariant Domain</bold>

A robust blind image watermarking scheme based on feature points and RS-invariant domain is proposed. Our goal is to detect the watermark without any prior knowledge about the original image and the suffered distortions. We address the robustness against both geometric distortions and signal processing attacks. To resist the cropping and the translation, the idea of the localized watermarking is introduced and the disks centered at the feature points by using the Harris detector are used to embed the watermark. To resist the rotation and the scaling, the watermark is embedded into the RS-invariant domain obtained by taking the magnitude of the 1-dimension DFT along the angular axis of the log-polar mapping (LPM) image repeatedly for each disk. Simulation results show that the proposed scheme is robust against both geometric distortions and signal processing attacks.