An improved image decryption system is proposed that is based on phase-encoded images and the principle of interference and uses a reference wave. A novel technique for generating intensity patterns from the decrypted phase information consists simply of interfering a reference wave with the wave passing through the encrypted image and a phase-only decrypting key. Optical experiments have confirmed the proposed technique as a simple and robust architecture for optical encryption.
© 2003 Optical Society of America
(070.4560) Fourier optics and signal processing : Data processing by optical means
(100.1160) Image processing : Analog optical image processing
(100.1390) Image processing : Binary phase-only filters
(100.3010) Image processing : Image reconstruction techniques
(120.3180) Instrumentation, measurement, and metrology : Interferometry
Dong-Hoan Seo and Soo-Joong Kim, "Interferometric phase-only optical encryption system that uses a reference wave," Opt. Lett. 28, 304-306 (2003)