摘要
在研究双随机相位加密和数字水印技术的基础上,提出了一种新的基于菲涅耳变换的盲信息隐藏方法。该方法将待隐藏水印信息经过透镜组微缩或放大成像后,利用随机相位板进行随机相位加密,然后离轴记录其像全息图像,通过编码将其以适当强度嵌入到原始宿主图像中,从而实现盲信息隐藏。理论分析和仿真实验表明:该方法对JPEG有损压缩、图像剪切、噪声污染、图像旋转、中值滤波等具有一定的抵抗能力,且具有一定安全性、鲁棒性和不可见性,对于提高传输信息的隐蔽性具有重要意义。
A new Fresnel holographic watermark hiding method is proposed based on the double - random phase encoding method and digital watermark technology. The hidden information magnified or minified by lens is modulated by a random phase mask and superposed by a reference wave, which gives us an encrypted Fresnel hologram. The encrypted Fresnel hologram is embedded with proper strength into host image through code en- cryption, and thus blind information hiding is realized. Theoretical analysis and computer simulation show that it is robust to JPEG compressing, cropping, Gaussian noise, image rotation, median filter and so on. Therefore, it not only has the characteristics of security, robustness and invisibility, but also is significant for improving the transmission of hidden information.
出处
《电讯技术》
北大核心
2012年第3期352-356,共5页
Telecommunication Engineering
基金
江苏省电子产品装备制造工程技术研究开发中心开发课题(SZKT08-007)
淮安市工业支撑项目(HAGZ2020011)~~
关键词
信息光学
信息隐藏
数字水印
菲涅耳变换
information optics
information hiding
digital watermark
Fresnel tansform
