Digital focusing of OCT images based on scalar diffraction theory and information entropy.
Biomed Opt Express
; 3(11): 2774-83, 2012 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-23162717
This paper describes a digital method that is capable of automatically focusing optical coherence tomography (OCT) en face images without prior knowledge of the point spread function of the imaging system. The method utilizes a scalar diffraction model to simulate wave propagation from out-of-focus scatter to the focal plane, from which the propagation distance between the out-of-focus plane and the focal plane is determined automatically via an image-definition-evaluation criterion based on information entropy theory. By use of the proposed approach, we demonstrate that the lateral resolution close to that at the focal plane can be recovered from the imaging planes outside the depth of field region with minimal loss of resolution. Fresh onion tissues and mouse fat tissues are used in the experiments to show the performance of the proposed method.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Biomed Opt Express
Año:
2012
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Estados Unidos