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Performance comparison of iterative algorithms for generating digital correlation holograms used in optical security
David Abookasis1, Amit Batikoff, Hagay Famini
1Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Israel.
Applied Optics
|June 27, 2006
Summary
This study presents an optical security system using two computer-generated holograms. The direct binary search (DBS) algorithm shows promising performance for secure holographic correlation.
Area of Science:
- Optics and Photonics
- Information Security
- Computer Vision
Background:
- Optical security systems offer unique advantages for data protection.
- Computer-generated holograms (CGHs) are crucial for advanced optical applications.
- Holographic correlations provide a method for pattern recognition and security.
Purpose of the Study:
- To develop and experimentally validate an optical security system.
- To investigate the use of two distinct binary computer-generated holograms for security.
- To compare the performance of the projection-onto-constrained-sets and direct binary search (DBS) algorithms in this context.
Main Methods:
- Designing two separate binary computer-generated holograms using iterative algorithms.
- Employing the projection-onto-constrained-sets algorithm and the direct binary search (DBS) algorithm.
- Utilizing a modified joint transform correlator to perform spatial correlation between the holograms.
Main Results:
- Successful construction of an output image through spatial correlation of the two CGHs.
- Demonstration of the system's performance via both simulation and experimental results.
- Comparative analysis highlighting the effectiveness of the DBS algorithm.
Conclusions:
- The developed optical security system effectively utilizes holographic correlation.
- The direct binary search (DBS) algorithm is a viable and effective method for designing security holograms.
- The system shows potential for secure information storage and retrieval applications.