A new spatial domain image watermarking scheme resisting geometric attacks

In order to resist geometric attacks, a novel spatial domain image watermarking scheme (FAQ) using feature point and quantization is presented. The main methods adopted include: 1) watermark synchronization is achieved by invariant local circular regions which can be generated using image locally most stable feature points; 2) fan-shaped sub-regions are generated in a rotation invariant pattern by partitioning the local region, and the watermark bits are embedded in spatial domain by odd-even quantization; 3) an odd-even detector is designed to extract the watermark blindly. Experimental results show that FAQ achieves high image quality, and it can efficiently resist traditional signal processing attacks, rotation/scaling/translation (RST) attacks as well as some combined attacks.