摘要
提出了一种数字水印算法,将DCT的能量压缩能力和DWT的多分辨率特性结合起来.该算法首先对二值水印图像进行置乱、降维、分段处理,然后分别按非均匀量化方法和图像标准差自适应法进行水印信息嵌入,最后重构成隐蔽图像传输.实验证明,该算法具有较好的不可见性及对抗常见攻击的鲁棒性.
A digital watermarking algorithm is proposed in this paper. The algorithm make full use of the energy compression of DCT and the multi-resolution of DWT. firstly the double value watermarking image is scrambled to get a one dimension binary bit stream and then divided into two segments, then they are embedded into the DCT coefficients by unequal quantification or DWT coefficients according to the difference of cover image＇s local standard deviation, a stegano cover image is reconstructed and transmitted lastly. Experimental resuhs demonstrate the algorithm is not only invisible, but also robust against various signal processing.
出处
《微电子学与计算机》
CSCD
北大核心
2009年第4期58-60,63,共4页
Microelectronics & Computer
