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Proceedings Paper

Enhanced optical image verification based on modified joint transform correlator architectures
Author(s): Hsuan T. Chang; Ching T. Chen
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Paper Abstract

In this paper two architectures for optical image verification are roposed. Both architectures are modified from conventional joint transform correlators (JTCs) and can significantly improve the recovered image quality. First, an input phase-only function is Fourier transformed and then is interfered with a reference wave that is diffracted from a plane wave incident on another random phase mask. Second, two phase-only functions are placed at the two input sides of a beam splitter such that the interference patternof their Fourier transforms can be detected. The intensity of the interference pattern in both architectures can be recorded and then its Fourier-transform can be obtained in the output plane. To obtain a predefined target image in the output plane, the input phase function is iteratively retrieved by the use of the projection onto constraint sets algorithm. Simulation results show that the less mean squared error and better image quality are obtained for both the binary and grayscale images.

Paper Details

Date Published: 23 October 2003
PDF: 10 pages
Proc. SPIE 5202, Optical Information Systems, (23 October 2003); doi: 10.1117/12.503806
Show Author Affiliations
Hsuan T. Chang, National Yunlin Univ. of Science and Technology (Taiwan)
Ching T. Chen, National Yunlin Univ. of Science and Technology (Taiwan)

Published in SPIE Proceedings Vol. 5202:
Optical Information Systems
Bahram Javidi; Demetri Psaltis, Editor(s)

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