Instrumentation, Techniques, and Measurement

Halving the dimension of a single image to be encrypted optically to avoid data expansion

[+] Author Affiliations
Jiawang Yi

Central South University, School of Information Science and Engineering, Changsha 410083, China

Changsha University of Science & Technology, School of Computer and Communication Engineering, Changsha 410114, China

Guanzheng Tan

Central South University, School of Information Science and Engineering, Changsha 410083, China

Opt. Eng. 55(6), 064111 (Jun 28, 2016). doi:10.1117/1.OE.55.6.064111
History: Received March 20, 2016; Accepted June 9, 2016
Text Size: A A A

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.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jiawang Yi and Guanzheng Tan
"Halving the dimension of a single image to be encrypted optically to avoid data expansion", Opt. Eng. 55(6), 064111 (Jun 28, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.064111


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.