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Amplitude image processing by diffractive optics

Abstract: In contrast to the standard digital image processing, which operates over the detected image intensity, we propose to perform amplitude image processing. Amplitude processing, like low pass or high pass filtering, is carried out using diffractive optics elements (DOE) since it allows to operate over the field complex amplitude before it has been detected. We show the procedure for designing the DOE that corresponds to each operation. Furthermore, we accomplish an analysis of amplitude image processing performances. In particular, a DOE Laplacian filter is applied to simulated astronomical images for detecting two stars one Airy ring apart. We also check by numerical simulations that the use of a Laplacian amplitude filter produces less noisy images than the standard digital image processing.

 Fuente: Optics Express, 2016, 24(4) 3268-3277

 Editorial: The Optical Society (OSA)

 Año de publicación: 2016

 Nº de páginas: 10

 Tipo de publicación: Artículo de Revista

 DOI: 10.1364/OE.24.003268

 ISSN: 1094-4087

 Proyecto español: FIS2012-31079

 Url de la publicación: https://doi.org/10.1364/OE.24.003268