摘要
在复合彩色数字水印图像的抗攻击优化的研究中,复合彩色数字水印图像亮度分量容易受到几何攻击,采用传统基于DCT域的复合彩色数字水印过程,未对水印信息进行有效的预处理,无法抑制几何攻击,导致彩色数字水印效果差、性能低的问题。提出基于YUV颜色编码和非下采样Contourlet变换(NSCT)与奇异值分解(SVD)结合的复合数字水印算法,分别介绍了非采样Contourlet变换、奇异值分解与YUV模型。将RGB模型的彩色图像转换成YUV模型的彩色图像,提取亮度分量进行NSCT,对变换后的低频部分进行奇异值分解,对水印信息进行Arnold变换置乱预处理,嵌入水印信息,按需对水印信息进行提取。仿真结果表明,所提算法具有很好的不可见性及鲁棒性,同时在抗几何旋转攻击性方面有较高的性能。
A compound digital watermark algorithm based on the combination of YUV color encoding and non - subsample Contourlet transform （NSCT） and singular value decomposition （SVD） is proposed. In this method, non - subsample Contourlet transform （NSCT）, singular value decomposition （SVD） and YUV model are introduced re- spectively. The color image of RGB model is converted into a color image of YUV model, the luminance component is extracted and the NSCT is made. The singular value decomposition is performed on the low frequency part after trans- formation. The watermark information is made Arnold transform scrambling pretreatment, the watermark information is embedded, and the watermark information is extracted according to the needs. Simulation results show that the pro- posed algorithm has good invisibility and robustness, and has high performance in the aspect of anti -geometric rota- tion attack.
出处
《计算机仿真》
CSCD
北大核心
2016年第6期418-422,共5页
Computer Simulation
基金
国家自然基金项目(60879022)
中国民航飞行学院青年基金(Q2013-045)
关键词
数字水印
非下采样变换
奇异值分解
颜色编码
Digital watermark
non - subsample transform
Singular value decomposition
Color coding
