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生物识别图象
相关语句
  biometric recognition image
     Research on the optical encryption for double biometric recognition image
     双生物识别图象的光学加密方法研究
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  相似匹配句对
     Research on the optical encryption for double biometric recognition image
     双生物识别图象的光学加密方法研究
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     MULTIBIOMETRICS IDENTIFICATION TECHNIQUES
     多生物特征识别
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     Fuzzy Judgment of Biological Cancer
     生物癌的模糊识别
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     COMPUTER RECOGNITION OF CANCER CELL IMAGE
     癌细胞图象的计算机识别
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     IMAGE RECOGNITION AND ITS APPLICATION
     图象识别与应用
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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...

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.

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

 
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