&lt;title&gt;Rotation-invariant photorefractive correlator&lt;/title&gt;

James Z. Wen; Xiangyang Yang

doi:10.1117/12.255487

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<title>Rotation-invariant photorefractive correlator</title>

James Z. Wen Xiangyang Yang

Year: 1996 Journal: Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE Vol: 2849 Pages: 285-292 Publisher: SPIE

DOI: 10.1117/12.255487

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Abstract

A rotation-invariant photorefractive correlation is reported in this paper. Matched filters synthesized with reference patterns at different rotational angles are stored in the photorefractive medium via angular and peristrophic multiplexing. During the recognition process, the input image is compared with all the reference patterns in parallel. The feasibility of the proposed correlator is demonstrated by experimental results.

Keywords:

Photorefractive effect Invariant (physics) Optics Rotation (mathematics) Multiplexing Optical correlator Physics Optical correlation Computer science Mathematics Artificial intelligence Telecommunications Mathematical analysis Fourier transform

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Advanced Optical Imaging Technologies

Physical Sciences → Engineering → Media Technology

Photorefractive and Nonlinear Optics

Physical Sciences → Physics and Astronomy → Atomic and Molecular Physics, and Optics

Photonic and Optical Devices

Physical Sciences → Engineering → Electrical and Electronic Engineering

<title>Rotation-invariant photorefractive correlator</title>

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