23 October 2003 A new image crypto-system
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Proceedings Volume 5202, Optical Information Systems; (2003); doi: 10.1117/12.501309
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States
Abstract
Dyadic displacements of an image can be regarded as a special type of permutations of pixel addresses. This property can be used to encrypt an image without information loss, damage, or addition. In this paper, a new optical image encryption technique based on dyadic permutations and holographic interference is proposed. First, we adopt holographic interference to record both the phase and amplitude of the Fourier transform of an input image as the intensity information. Then the recorded phase is processed through dyadic permutations based on exclusive-OR (XOR) operations. The original image can be successfully recovered by using the inverse procedure.
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Yi C. Chang, Hsuan T. Chang, Chung J. Kuo, "A new image crypto-system", Proc. SPIE 5202, Optical Information Systems, (23 October 2003); doi: 10.1117/12.501309; https://doi.org/10.1117/12.501309
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KEYWORDS
Image encryption

Image restoration

Fourier transforms

Image processing

Holograms

CCD cameras

Computer security

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