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| 摘要: |
| 针对如何在双随机编码中提高加密图像的保密性能,提出了一种新的光学图像加密方法,采用变形分数傅立叶变换的光学结构来完成对图像的加密和解密。其显著特点是在解密时采用了便于光学实现的非负阶次的分数傅立叶变换,能够使加密系统有6个以上的加密自由度,并能增加加密密钥的数量。仿真结果表明:分数阶作为加密密钥的鲁棒性好,被加密图像的保密性能得到提高。 |
| 关键词: 光学图像加密,分数傅立叶变换,变形分数傅立叶变换,双随机相位编码 |
| DOI： |
| 分类号:TN911 |
| 基金项目: |
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| Optical image encryption using anamorphic fractional fourier transform |
|
LIN Rui
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| Abstract: |
| A novel optical image encryption method and its optical implementation are proposed.The method applies an optical architecture of the anamorphic fractional Fourier transform to encrypting as well as decrypting images.It is the unique property to use nonne |
| Key words: optical image encryption,fractional Fourier transform(FRFT),anamorphic fractional Fourier transforms(AFRFT),double random phase coding |
