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Application of Cosine Zone Plates to Image Encryption |
GE Fan1,2, CHEN Lin-Fei1,2, ZHAO Dao-Mu1 |
1Department of Physics, Zhejiang University, Hangzhou 3100272The School of Science, Hangzhou Dianzi University, Hangzhou 310018 |
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Cite this article: |
GE Fan, CHEN Lin-Fei, ZHAO Dao-Mu 2008 Chin. Phys. Lett. 25 2863-2865 |
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Abstract We analyse the diffraction result of optical field after Cosine zone plate, and theoretically deduce its transform matrix. Under some conditions, its diffraction distribution is a mixture of fractional Fourier spectra. Then we use Cosine zone plate and its diffraction result to image encryption. Possible optical image encryption and decryption implementations are proposed, and some numerical simulation results are also provided.
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Keywords:
42.30.Kq
42.30.Va
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Received: 19 March 2008
Published: 25 July 2008
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