Open AccessNoniterative sub-pixel shifting super-resolution lensless digital holography
Author(s) -
Hee-Jung Lee,
Jongwu Kim,
Junwoo Kim,
Philjun Jeon,
Seung Ah Lee,
Dugyoung Kim
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.433719
Subject(s) - optics , holography , digital holography , resolution (logic) , pixel , computer science , image resolution , frequency domain , nyquist frequency , detector , nyquist–shannon sampling theorem , spatial frequency , physics , artificial intelligence , computer vision , filter (signal processing)
Lensless digital holography (LDH) is gaining considerable attention lately due to a simple experimental setup, wide field-of-view, and three-dimensional (3D) imaging capability. Since the resolution of LDH is limited by the Nyquist frequency of a detector array, the major drawback of LDH is resolution, and a lot of efforts were made to enhance the resolution of LDH. Here we propose and demonstrate a fast noniterative sub-pixel shifting super-resolution technique that can effectively enhance the resolution of LDH by a factor of two. We provide detailed frequency-domain formulae for our noniterative frequency-domain super-resolution method. The validity of our proposed method is experimentally demonstrated both for scattering and phase objects.