[OPTICAL REVIEW Vol. 8, No. 6 (2001) 413-415]
Fourier-Plane Encryption Technique Based on Removing the Effect of Phase Terms in a Joint Transform Correlator
Se-Joon PARK1,*, Jong-Yun KIM2, Jang-Keun BAE3 and Soo-Joong KIM1
1Department of Electronic Engineering, Kyungpook National University, Taegu, 702-701 Korea, 2Kyungdong University, School of Information Technology Engineering, Sokcho, Korea, 3Kumi College, Department of electronic Information, Kyungpook, 730-711 Korea
(Received September 6, 2001; Accepted September 28, 2001)
We propose a Fourier-plane encryption technique based on a joint transform correlator (JTC). The technique is based on removing the effect of phase terms in JTC and the auto-correlation terms contribute to reconstructing the original image. Computer simulations and optical experiments show the proposed method is very useful for JTC architecture.
Key words : optical security system, optical encryption, joint transform correlator, spatial light modulator, square law device, computer generated hologram
psj@palgong.knu.ac.kr