不变小波域内基于DWT的图像数字水印

An image digital watermarking based on DWT in invariant wavelet domain

面对各种几何攻击,现有数字水印算法露出各种缺陷,到目前为止还没有发现真正能抵抗各种攻击特别是几何攻击的算法.利用具有旋转、伸缩、平移不变性的RST不变小波变换设计了一种新颖的基于量化边通信模型的DWT盲数字水印算法.实验表明,这种新颖算法对于旋转、伸缩、平移等普通几何攻击以及滤波与噪声等多种攻击具有较好的鲁棒性,但该算法对局部几何攻击具有一定的敏感性.

In the face of geometrical attacks, all shortcomings of the almost all digital watermarking algorithms have been exposed. Perhaps there is no algorithm against every attack especially geometrical attacks. It is designed a novel blind image watermarking algorithm of Scalar Costa System based on the DWT transformation in the Rotation- and Scale- and Translation- （RST） Moment Invariant Wavelet, i. e. RSTMIW domain. The experiments show that this novel algorithm is robust against RST geometrical, filter and noise attacks, however,sensitive to some local geometrical attacks.