Single-channel optical encryption of color image using chessboard grating and diffraction imaging scheme

Ye Chen; Qi Liu; Jun Wang; Qiong-Hua Wang

doi:10.1117/1.OE.56.12.123106

14 December 2017 Single-channel optical encryption of color image using chessboard grating and diffraction imaging scheme

Ye Chen, Qi Liu, Jun Wang, Qiong-Hua Wang

Author Affiliations +

Funded by: Natural Science Foundation of China, National Natural Science Foundation of China (NSFC), NSFC

Optical Engineering, Vol. 56, Issue 12, 123106 (December 2017). https://doi.org/10.1117/1.OE.56.12.123106

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.

Citation Download Citation

Ye Chen, Qi Liu, Jun Wang, and Qiong-Hua Wang "Single-channel optical encryption of color image using chessboard grating and diffraction imaging scheme," Optical Engineering 56(12), 123106 (14 December 2017). https://doi.org/10.1117/1.OE.56.12.123106

Received: 10 August 2017; Accepted: 28 November 2017; Published: 14 December 2017

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