Open AccessOptical three-dimensional refocusing from elemental images based on a sifting property of the periodic δ-function array in integral-imaging
Author(s) -
Jae-Young Jang,
Dong-Hak Shin,
Eun-Soo Kim
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.001533
Subject(s) - integral imaging , optics , property (philosophy) , spatial frequency , object (grammar) , inverse , image (mathematics) , point spread function , physics , computer science , computer vision , artificial intelligence , mathematics , geometry , philosophy , epistemology
We propose a novel approach to optically refocus three-dimensional (3-D) objects on their real depth from the captured elemental image array (EIA) by using a sifting property of the periodic δ-function array (PDFA) in integral-imaging. By convolving the PDFAs whose spatial periods correspond to each object's depth with the sub-image array (SIA) transformed from the EIA, a set of spatially filtered-SIAs (SF-SIAs) for each object's depth can be extracted. These SF-SIAs are then inverse-transformed into the corresponding versions of the EIAs, and from these, 3-D objects with their own perspectives can be reconstructed to be refocused on their depth in the space. The feasibility of the proposed method has been confirmed through optical experiments as well as ray-optical analysis.