A novel fully phase color image encryption/decryption scheme based on joint fractional Fourier transform correlator (JFRTC) and phase retrieval algorithm (PRA) is proposed. The security of the system is enhanced by the fractional order as a new added key. This method takes full advantage of the parallel processing features of the optical system and could optically realize single-channel color image encryption. The system and operation procedures are simplified. The simulation results of a color image indicate that the new method provides efficient solutions with a strong sense of security.
© 2011 Chinese Optics Letters
(070.4550) Fourier optics and signal processing : Correlators
(100.4550) Image processing : Correlators
(100.5070) Image processing : Phase retrieval
(070.2575) Fourier optics and signal processing : Fractional Fourier transforms
Ding Lu and Weimin Jin, "Fully phase color image encryption based on joint fractional Fourier transform correlator and phase retrieval algorithm," Chin. Opt. Lett. 9, 021002- (2011)