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Contrast manipulation and controllable spatial filtering via photorefractive four wave mixing and two-beam coupling

Contrast manipulation and controllable spatial filtering via photorefractive four wave mixing and two-beam coupling
Contrast manipulation and controllable spatial filtering via photorefractive four wave mixing and two-beam coupling
A scheme is presented that achieves passive controllable spatial filtering via two-beam coupling in BaTiO3, between a reference beam and the optical Fourier transform of an input image. The nature of the spatial filtering is determined by the intensity dependent gain seen by each component of the Fourier transform. By appropriate choice of intensity ratio, the operations of contrast enhancement, feature extraction, and defect enhancement are possible, and representative examples of these are given.
Hussain, G.
60f5b057-92d8-4506-a5f2-19eb167e4d8e
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Khoury, J.A.
07e5a20e-fa57-42e9-aaf8-6d781f265a24
Hussain, G.
60f5b057-92d8-4506-a5f2-19eb167e4d8e
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Khoury, J.A.
07e5a20e-fa57-42e9-aaf8-6d781f265a24

Hussain, G., Eason, R.W. and Khoury, J.A. (1990) Contrast manipulation and controllable spatial filtering via photorefractive four wave mixing and two-beam coupling. Topical Meeting on Photorefractive Materials and Devices, Aussois, France. 17 - 19 Jan 1990.

Record type: Conference or Workshop Item (Paper)

Abstract

A scheme is presented that achieves passive controllable spatial filtering via two-beam coupling in BaTiO3, between a reference beam and the optical Fourier transform of an input image. The nature of the spatial filtering is determined by the intensity dependent gain seen by each component of the Fourier transform. By appropriate choice of intensity ratio, the operations of contrast enhancement, feature extraction, and defect enhancement are possible, and representative examples of these are given.

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More information

Published date: 1990
Venue - Dates: Topical Meeting on Photorefractive Materials and Devices, Aussois, France, 1990-01-17 - 1990-01-19
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 380016
URI: https://eprints.soton.ac.uk/id/eprint/380016
PURE UUID: bc8f7663-ebde-4d4f-b56e-a9c1a28ae7a9
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 04 Aug 2015 15:45
Last modified: 06 Jun 2018 13:13

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