Open AccessLateral resolution improvement of oversampled OCT images using Capon estimation of weighted subvolume contribution
Author(s) -
Evgenia Bousi,
Ioanna Zouvani,
Costas Pitris
Publication year - 2017
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.8.001319
Subject(s) - capon , optical coherence tomography , optics , image resolution , oversampling , estimator , computer science , resolution (logic) , synthetic aperture radar , coherence (philosophical gambling strategy) , physics , algorithm , artificial intelligence , mathematics , telecommunications , beamforming , statistics , bandwidth (computing) , quantum mechanics
A novel technique for lateral resolution improvement in optical coherence tomography (OCT) is presented. The proposed method is based on lateral oversampling of the image. The locations and weights of multiple high spatial resolution sub-volumes are calculated using a Capon estimator assuming each contributes a weighted portion to the detected signal. This technique is independent of the delivery optics and the depth of field. Experimental results demonstrate that it is possible to achieve ~4x lateral resolution improvement which can be diagnostically valuable, especially in cases where the delivery optics are constrained to low numerical aperture (NA).