Optical Image Encryption Technique Based on Hybrid-pattern Phase Keys
We propose an implementation scheme for an optical encryption system with hybrid-pattern random keys. In the encryption process, a pair of random phase keys composed of a white-noise phase key and a structured phase key are positioned in the input plane and Fourier-spectrum plane respectively. The o...
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Published in | Current optics and photonics Vol. 2; no. 6; pp. 540 - 546 |
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Main Authors | , , , , |
Format | Journal Article |
Language | Korean |
Published |
2018
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Subjects | |
Online Access | Get full text |
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Summary: | We propose an implementation scheme for an optical encryption system with hybrid-pattern random keys. In the encryption process, a pair of random phase keys composed of a white-noise phase key and a structured phase key are positioned in the input plane and Fourier-spectrum plane respectively. The output image is recoverable by digital reconstruction, using the conjugate of the encryption key in the Fourier-spectrum plane. We discuss the system encryption performance when different combinations of phase-key pairs are used. To measure the effectiveness of the proposed method, we calculate the statistical indicators between original and encrypted images. The results are compared to those generated from a classical double random phase encoding. Computer simulations are presented to show the validity of the method. |
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Bibliography: | KISTI1.1003/JNL.JAKO201809242560045 |
ISSN: | 2508-7266 2508-7274 |