Analysis of Bragg diffraction filters applied to image processing

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Title: Analysis of Bragg diffraction filters applied to image processing
Authors: Márquez, Andrés | Neipp, Cristian | Gallego, Sergi | Ortuño, Manuel | Beléndez, Augusto | Pascual, Inmaculada
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Holography | Holographic recording materials | Imaging processing | Volume gratings
Knowledge Area: Óptica | Física Aplicada
Date Created: 18-Oct-2003
Issue Date: May-2005
Publisher: Institute of Physics Publishing
Citation: MÁRQUEZ RUIZ, Andrés, et al. "Analysis of Bragg diffraction filters applied to image processing". Physica Scripta. Vol. T118 (2005). ISSN 0031-8949, pp. 54-57
Abstract: In this work we study the properties offered by holographically recorded volume gratings when applied to image processing in imaging systems. Angular selectivity due to Bragg diffraction modifies the transfer function of the imaging system and spatial filtering operations are performed with no need of a Fourier plane. We use Kogelnik's coupled wave theory to calculate these transfer functions. We demonstrate both edge enhancement and image smoothing in amplitude objects and in phase-only objects. To obtain satisfactory processed images we analyze the influence of the different parameters of the volume grating. Both experimental and simulated results are shown with an excellent agreement. In certain applications image processing by Bragg diffraction offers an interesting alternative with respect to Fourier plane based strategies.
Sponsor: This work has been partially financed by Ministerio de Educación y Ciencia, Spain, project MAT2004-04881-C02-02, and by Generalitat Valenciana, Spain, projects GV04A-574 and GRUPOS04-69.
ISSN: 0031-8949 (Print) | 1402-4896 (Online)
DOI: 10.1238/Physica.Topical.118a00054
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Appears in Collections:INV - GHPO - Artículos de Revistas

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