Topological spatial differentiation via complex amplitude filtering in Fourier space.
Opt Lett
; 48(13): 3591-3594, 2023 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-37390188
ABSTRACT
Various approaches to implementing optical analog differentiation have been studied extensively and applied in edge-based image processing. Here, we report a topological optical differentiation scheme based on complex amplitude filtering, i.e., amplitude and spiral phase modulation in Fourier space. The isotropic and anisotropic multiple-order differentiation operations are demonstrated both theoretically and experimentally. Meanwhile, we also achieve multiline edge detection corresponding to the differential order for the amplitude and phase objects. This proof-of-principle work could open up new avenues for engineering a nanophotonic differentiator and realizing a more compact image-processing system.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Processamento de Imagem Assistida por Computador
/
Engenharia
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2023
Tipo de documento:
Article