A New Spatial Domain Image Watermarking Scheme Resisting Geometric Attacks
一种新的空域抗几何攻击图像水印算法

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.