摘要
对混沌映射加密水印算法进行了研究分析,采用logistic映射对原始水印图像进行置乱,并将其反复迭代次数作为密钥,在此基础上采用小波变换得到图像的近似分量,对该近似分量做离散余弦变换,把经过加密的水印信息嵌入到特定频带内.实验证明,算法具有良好的视觉效果和鲁棒性,在应用中能够表现出较强的抗攻击性能.
The chaos mapping encryption watermark algorithm is analyzed and studed, the primitive watermark image is scrambled using logistic mapping, and its repeatedly iterative number is made as key. The discrete cosine is made for the image approximate component which is obtaind using wavelet transformation. Finally, the encryption watermark information is inserted into the given frequency band. The experiments indicate that the algorithm has well visual effect and robustness, and has strong attackresistance in application.
出处
《宁夏大学学报（自然科学版）》
CAS
北大核心
2008年第2期147-150,共4页
Journal of Ningxia University(Natural Science Edition)
关键词
数字水印
分类
空间域
变换域
digital watermark
assortment
space region
transformation territory
