中文摘要：

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。

英文摘要：

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.