基于菲涅耳数字全息的水印技术  

Digital Watermark Technique by Use of Fresnel Digital Holography

作　　者：位恒政[1] 彭翔[1] 张鹏[2] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]中国建设银行总行电子银行部,北京100032

出　　处：《系统仿真学报》2007年第22期5351-5354,5360,共5页Journal of System Simulation

基　　金：国家自然科学基金项目(60472107);广东省自然科学基金(04300862);深圳市科技计划项目(200426);中科院微系统与信息技术研究所资助课题。

摘　　要：提出了一种基于菲涅耳变换的数字全息水印方法,通过选择菲涅耳变换中的波长和衍射距离参数从而得到不同的变换平面,弥补了傅里叶变换数字全息只有一个变换平面的缺点。用此算法得到的数字水印为实数,便于在网络上传输。对算法的测试结果表明:该水印算法具有很强的抗剪切、滤波攻击的能力,鲁棒性强。系统具有多重密钥,安全性很高。该水印方法能够成为数字多媒体产品版权保护的有效方案,在电子银行安全、电子商务等领域亦有广阔的应用前景。A new digital watermarking method based on Fresnel transform and digital holography was proposed, With this method it is possible to embed watermark in many different observable planes with various distance parameters of Fresnel transform. Therefore, this method can overcome the weakness of having only one transform plane in Fourier digital holography. The watermark produced by this method is real and can be easy to transfer on the Internet. Numerical experiments show that the embedded watermark is robust to signal manipulations, such as superposing noise, cropping and filtering. In addition, multiple keys provide a good security. There is also an application prospect in the fields of E-Banking Security and E-Commerce.

关 键 词：信息光学 数字全息 数字水印 菲涅耳变换 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]