Automatic focusing in digital holography and its application to stretched holograms.
Opt Lett
; 36(10): 1945-7, 2011 May 15.
Article
en En
| MEDLINE
| ID: mdl-21593944
ABSTRACT
The searching and recovering of the correct reconstruction distance in digital holography (DH) can be a cumbersome and subjective procedure. Here we report on an algorithm for automatically estimating the in-focus image and recovering the correct reconstruction distance for speckle holograms. We have tested the approach in determining the reconstruction distances of stretched digital holograms. Stretching a hologram with a variable elongation parameter makes it possible to change the in-focus distance of the reconstructed image. In this way, the proposed algorithm can be verified at different distances by dispensing the recording of different holograms. Experimental results are shown with the aim of demonstrating the usefulness of the proposed method, and a comparative analysis has been performed with respect to other existing algorithms developed for DH.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Procesamiento de Imagen Asistido por Computador
/
Holografía
/
Fenómenos Ópticos
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Opt Lett
Año:
2011
Tipo del documento:
Article
País de afiliación:
Italia