| 双生物识别图象的光学加密方法研究 |
| |
| 引用本文： | 李榕,李萍.双生物识别图象的光学加密方法研究[J].四川激光,2005,26(3):67-69. |
| |
| 作者姓名： | 李榕 李萍 |
| |
| 作者单位： | 华南师范大学物理与电信工程学院 广州510631
(李榕)，华南师范大学物理与电信工程学院 广州510631(李萍) |
| |
| 基金项目： | 广东省自然科学基金 (0 2 10 89)，广东省教育厅自然科学研究项目 (Z0 2 0 2 0 )资助 |
| |
| 摘 要： | 本文提出了一种将两幅生物识别图象通过一套光学系统进行同时加密的方法。该方法先将一幅图象转换为纯相位和进行纯相位编码,再对另一幅图象编码,然后经过4f光学系统作频率域纯相位编码,并利用与编码过程类似的方法进行解码。可以证明该方法的编码图象为恒定的白噪声。解码过程具有鲁棒性,相位部分图象加密的安全性要高于振幅部分图象的加密。并分析了加性高斯噪声对解码图象的影响
|
| 关 键 词： | 光学加密 生物识别图象 随机相位 |
| 文章编号： | 0253-2743(2005)03-0067-02 |
| 修稿时间： | 2004年4月5日 |
Research on the optical encryption for double biometric recognition image |
| |
| LI Rong,LI Ping.Research on the optical encryption for double biometric recognition image[J].Laser Journal,2005,26(3):67-69. |
| |
| Authors: | LI Rong LI Ping |
| |
| Abstract: | The method of the optical encryption for double biometric recognition image in an optical security system is proposed.An image is amplitude and another is phase information.Phase image that is phase encoded together with a amplitude image is Fourier transformed.Then it attached an random phase mask in Fourier space is recoded and reverse-Fourier transformed.The decryption of the encrypted image can be carried out in the same means with encryption.It is proved that encryption image is stationary white noise.Decryption method is robust.When the performance of phase encryption image is compared with that of amplitude encryption image in the security the security of phase encryption image is ever more efficiency.The performance of the decryption image is analyzed in the presence of additive noise. |
| |
| Keywords: | optical encryption biometric recognition image random phase |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
