双随机相位图像加密的实值编码研究被引量：13

Research on the Image Security in Double Random Phase Real-value Encryption

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摘要提出了一种基于双随机相位的图像实值编码方法,该方法可应用于光学图像加密.要编码的纯相位图像分别在空间域和频域加入随机相位掩膜,其中在频域将编码范围扩大4倍,经过光学系统的变换,将生成的图像取实部作为编码图像.实值编码的图像利用与编码过程类似的方法进行解码,可以准确地重建原图像.该编译码方法简单,编码图像是一个近似随机噪声的实值图像,便于数字图像的传输与输出. The double random phase real-value encryption and decryption method is proposed for the optical image security system. A phase-only image to be encrypted together with a random phase mask in space plane is Fourier transformed. Then it attached anther random phase mask in Fourier plane is enlarged and reverse-Fourier transformed. Real part of the result is used as an encrypted image. The decryption of the real-value encrypted image can be carried out in the same means with encryption. That gives the exact original image. The method of encryption and decryption is simply performed and encrypted image is real-valued, so it is convenient for output.

作者李榕李萍

机构地区华南师范大学物理与电信工程学院

出处《光子学报》 EI CAS CSCD 北大核心 2005年第6期952-955,共4页 Acta Photonica Sinica

基金广东省自然科学基金(021089) 广东省教育厅自然科学研究项目(Z02020)资助

关键词光学加密图像双随机相位编码实值编码 Optical security Image Double random phase Real-value encryption

分类号 TN911 [电子电信—通信与信息系统]

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参考文献9

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二级参考文献7

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