A feature-based robust digital image watermarking scheme

The effectiveness of a digital watermarking algorithm is indicated by the robustness of embedded watermarks against various attacks. Improving the robustness of a watermark so as to withstand attacks has been one of the main research objectives in digital image watermarking. The two issues of existing feature-based schemes that have to be addressed are: one is avoiding repeated selection of robust regions for watermarking to resist similar attacks, and the other is the difficulty of selecting the most robust and smallest feature region set to be watermarked. In order to achieve robustness, an overall architecture for a feature-based robust digital image watermarking scheme is designed. A simulated attacking procedure is performed using predefined attacks to evaluate the robustness of every candidate feature region selected. Comparing with some well-known feature-based methods, the proposed method exhibits better performance in robust digital watermarking.