摘要
基于计算全息,结合4f系统双随机相位图像加密技术,提出了一种图像加密以及传输的新方法。分析了计算全息(CGH)记录图像独具的扩频效应及特有的解密密钥,并实现了针对全息图不同的频谱单元及组合,采用原相位板、共轭板以及两者的有序组合作为解密密钥的计算机模拟,研究了其抗噪性能,新方法提高了图像加密的安全性。
A new image encryption technology based on computer generated hologram（CGH） combined with the 4f system of double random phase image encryption technology is proposed.The unique spread spectrum characteristics of CGH recording encryption image is analyzed,achieving the computer simulation of using the original of phase plate,conjugate panels and the combination with them as the decryption keys of the different spectrum units or spectrum units combination.And the anti-noise ability of this image encryption method is also analyzed.This proposed method improves the security of image encryption.
出处
《激光与光电子学进展》
CSCD
北大核心
2012年第4期66-71,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51072085
11104153)资助课题
关键词
图像处理
图像加密
计算全息
单元频谱
光学密钥
组合密钥
image processing
image encryption
computer generated hologram
spectrum unit
optical keys
combined decryption keys
