Extended focused imaging and depth map reconstruction in optical scanning holography.
Appl Opt
; 55(5): 1040-7, 2016 Feb 10.
Article
in En
| MEDLINE
| ID: mdl-26906373
ABSTRACT
In conventional microscopy, specimens lying within the depth of field are clearly recorded whereas other parts are blurry. Although digital holographic microscopy allows post-processing on holograms to reconstruct multifocus images, it suffers from defocus noise as a traditional microscope in numerical reconstruction. In this paper, we demonstrate a method that can achieve extended focused imaging (EFI) and reconstruct a depth map (DM) of three-dimensional (3D) objects. We first use a depth-from-focus algorithm to create a DM for each pixel based on entropy minimization. Then we show how to achieve EFI of the whole 3D scene computationally. Simulation and experimental results involving objects with multiple axial sections are presented to validate the proposed approach.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Holography
/
Image Interpretation, Computer-Assisted
/
Optical Imaging
Language:
En
Journal:
Appl Opt
Year:
2016
Document type:
Article