Multiple-Phase Retrieval for Optical Security Systems by Use of Random-Phase Encoding
Applied Optics, Vol. 41, Issue 23, pp. 4825-4834 (2002)
http://dx.doi.org/10.1364/AO.41.004825
Acrobat PDF (1327 KB)
Abstract
The technique of the multiple phase encoding for optical security and verification systems is presented in this paper. This technique is based on a 4-f optical correlator that is a common architecture for optical image encryption and verification systems. However, two or more phase masks are iteratively retrieved by use of the proposed multiple phases retrieval algorithm (MPRA) to obtain the target image. The convergent speed of the iteration process in the MPRA is significantly increased and the recovered image is much more similar to the target image than those in previous approaches. In addition, the quantization effects due to the finite resolution of the phase levels in practical implementation are discussed. The relationships between the number of phase masks and the quantized phase levels are also investigated. According to the simulation results, two and three phase masks are enough to design an efficient security verification system with 64 and 32 phase levels, respectively.
© 2002 Optical Society of America
[Optical Society of America ]
OCIS Codes
(070.2590) Fourier optics and signal processing : ABCD transforms
(100.3010) Image processing : Image reconstruction techniques
(100.4550) Image processing : Correlators
(100.5070) Image processing : Phase retrieval
Citation
Hsuan T. Chang, Wei C. Lu, and Chung J. Kuo, "Multiple-Phase Retrieval for Optical Security Systems by Use of Random-Phase Encoding," Appl. Opt. 41, 4825-4834 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-23-4825
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Study on the convergence property of the hybrid input–output algorithm used for phase retrieval (JOSAA)
- Optical Security System with Fourier Plane encoding (AO)
- Speckle Imaging and Hidden Phase (AO)
- Reconstruction of an Object From Its Noisy Fourier Modulus: Ideal Estimate of the Object to Be Reconstructed and a Method That Attempts to Find That Estimate (AO)
- Reconstruction of an Object from its Fourier Modulus: Development of the Combination Algorithm Composed of the Hybrid Input–Output Algorithm and Its Converging Part (AO)
Related Conference Papers
- Coherent imaging with illumination optics designed for the reconstruction algorithm
- Dependent Secret Key Sharing Scheme for Optical Image Verification
- Dependent Secret Key Sharing Scheme for Optical Image Verification
- Dependent Secret Key Sharing Scheme for Optical Image Verification
- Dependent Secret Key Sharing Scheme for Optical Image Verification
« Previous Article | Next Article »
OSA is a member of 