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Optical Engineering • new

Single-channel optical encryption of color image using chessboard grating and diffraction imaging scheme
Author(s): Ye Chen; Qi Liu; Jun Wang; Qiong-Hua Wang
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Paper Abstract

A single-channel encryption method for color images is proposed using chessboard grating and a phase-retrieval algorithm in the Fresnel domain. The pixel sampling operation is introduced to convert the color image to be encrypted into a Bayer image. Thereafter, with a single channel, the Bayer image is encoded by the chessboard grating before being sent into a diffractive-imaging-based encryption scheme. The cryptosystem is simple owing to only one single intensity pattern being required during encryption. In the decryption procedure, the phase-retrieval algorithm and the chessboard grating are combined to extract the plaintext from the intensity pattern. This proposal not only can successfully encrypt a color image into a single diffractive intensity pattern but also can recover the primary color image with high quality from the one single diffraction pattern with a compact optical setup. Numerical simulations are carried out to prove the feasibility and validity of the proposal.

Paper Details

Date Published: 14 December 2017
PDF: 9 pages
Opt. Eng. 56(12) 123106 doi: 10.1117/1.OE.56.12.123106
Published in: Optical Engineering Volume 56, Issue 12
Show Author Affiliations
Ye Chen, Sichuan Univ. (China)
Qi Liu, Sichuan Univ. (China)
Jun Wang, Sichuan Univ. (China)
Qiong-Hua Wang, Sichuan Univ. (China)
Fuzhou Univ. (China)

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