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中文摘要：
数字水印对几何攻击的鲁棒性问题一直没有得到很好的解决,该文提出了一种能够抵抗RST（旋转、缩放、平移）攻击,局部剪切以及常规信号处理攻击的多比特图像水印算法。该文利用尺度不变特征变换（SIFT）进行水印信号的同步;设计了一种圆环形的水印模式,并在空域采用奇偶量化嵌入水印;并设计了一种奇偶检测器提取水印。实验结果表明该算法能获得很好的图像质量,且能十分有效地抵抗各种几何攻击以及常规的压缩,滤波等攻击。
英文摘要：
Watermark robustness to geometric attacks is still an open problem. This paper presents a new multi-bit image watermarking scheme that can resist Rotation, Scaling, Translation （RST）, cropping as well as common signal processing attacks. The proposed scheme achieves watermark synchronization using Scale-Invariant Feature Transform （SIFT）. The watermark is designed in a cirque pattern and it is embedded in spatial domain using odd-even quantization. An odd-even detector is designed to extract the watermark. Simulation results show that the proposed scheme achieves good image quality and it is robust to geometric attacks as well as traditional image compression, filtering operations.
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