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

Contrast manipulation and controllable spatial filtering via photorefractive two-beam coupling
Contrast manipulation and controllable spatial filtering via photorefractive 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.
0030-4018
272-276
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.
60f5b057-92d8-4506-a5f2-19eb167e4d8e
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020

Khoury, J.A., Hussain, G. and Eason, R.W. (1989) Contrast manipulation and controllable spatial filtering via photorefractive two-beam coupling. Optics Communications, 70 (4), 272-276. (doi:10.1016/0030-4018(89)90318-0).

Record type: Article

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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Published date: 15 March 1989

Identifiers

Local EPrints ID: 77510
URI: http://eprints.soton.ac.uk/id/eprint/77510
ISSN: 0030-4018
PURE UUID: 036408e0-370c-4adc-a85d-fdd14713b874
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

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Date deposited: 11 Mar 2010
Last modified: 13 Dec 2019 01:39

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