Share Email Print

Optical Engineering

Halving the dimension of a single image to be encrypted optically to avoid data expansion
Author(s): Jiawang Yi; Guanzheng Tan
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

When directly applying optical transforms, such as fractional Fourier transform (FrFT), to a single image or real image (input image), the resulting image will become complex-valued, which leads to the doubling of data volume. This data expansion problem can be found in many existing single-image optical encryption schemes. We propose a folding technique to offset the data expansion by constructing a complex input image of half size. And we devise an optical single-image encryption scheme based on double FrFTs, in which this technique together with compressed sensing can bring about the possible maximum compression of encrypted images. Moreover, the chaos-based random circular shift for scrambling is introduced to enhance security. The chaotic random signum matrix is also tried as the measurement matrix, and it displays a good performance. Simulation results demonstrate the validity and security of the proposed scheme.

Paper Details

Date Published: 28 June 2016
PDF: 11 pages
Opt. Eng. 55(6) 064111 doi: 10.1117/1.OE.55.6.064111
Published in: Optical Engineering Volume 55, Issue 6
Show Author Affiliations
Jiawang Yi, Central South Univ. (China)
Changsha Univ. of Science & Technology (China)
Guanzheng Tan, Central South Univ. (China)

© SPIE. Terms of Use
Back to Top