Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Practical image encryption and decryption by phase-coding technique for optical security systems

Not Accessible

Your library or personal account may give you access

Abstract

A method of image encryption and decryption is proposed for optical security systems. A phase-coded image to be encrypted together with a random phase pattern is Fourier transformed and the result of the complex-valued data is used as an encrypted pattern. The decryption is simply performed by an inverse-Fourier transform for the addition of the encrypted pattern and the Fourier transform of the random phase. The intensity of the inverse-Fourier transformed image gives the exact result for the decryption. Further, the binarization of the encrypted pattern is performed for the easiness of the optical and electronic readout of the images, and it also gives rise to the enhancement of the degree of security for the encryption. The binary pattern is optimized by a statistical iteration technique and an excellent decryption image is obtained by the optimization.

© 2002 Optical Society of America

Full Article  |  PDF Article
More Like This
Experimental demonstration of kinogram-based single-phase decryption technique for information security

Tien Viet Vu, Nam Kim, Jun-Won An, and Sung-Back Hong
Appl. Opt. 46(31) 7662-7669 (2007)

Security-enhanced multiple-image encryption based on quick response codes and modified double random phase encoding in the fractional Fourier transform domain

Zhihan Wang, Yanfeng Su, Xunyuan Wang, Boyu Wang, Shun Li, Chen Liu, Jinsong Li, Zhijian Cai, and Wenqiang Wan
Appl. Opt. 61(24) 7255-7264 (2022)

Optical encryption system with a binary key code

Takanori Nomura and Bahram Javidi
Appl. Opt. 39(26) 4783-4787 (2000)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved