基于FRFT盲检测Chirp类数字水印算法  

Chirp Typed Blind Watermarking Algorithm Based on Fractional Fourier Transform

作　　者：张峰[1] 穆晓敏[1] 杨守义[1] 齐林[1] 

机构地区：[1]郑州大学信息工程学院,郑州450052

出　　处：《计算机工程与应用》2006年第27期57-61,共5页Computer Engineering and Applications

基　　金：国家自然科学基金资助项目(编号:60472044)

摘　　要：文章分析了图像在分数阶傅立叶域能量分布,提出了一种利用分数阶傅立叶变换的空域、变换域联合的多分量数字水印方法,该算法直接在空域嵌入,在分数阶傅立叶变换域内盲检测。仿真证明,该算法具有透明性好,检测快等优点,并对一些常见图像处理过程具有鲁棒性。A spatial-transform domain digital image watermarking technique using fractional Fourier transform（FRFT）, and the energy distribution at FRFT domain,is proposed and the energy distribution of the image at different FRFT domain is discussed.In this technique,chirp typed watermark is embedded in the spatial domain directly,and detected in the FRFT domain.The experimental results show that this technique can make the watermarking perceptual invisibility and be detected quickly,and it is also robustness to some common image processing.

关 键 词：数字水印 分数阶傅立叶变换 CHIRP信号 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]