Open AccessAlignment methods for nanotomography with deep subpixel accuracy
Author(s) -
Michal Odstrčil,
Mirko Holler,
Jörg Raabe,
Manuel GuizarSicairos
Publication year - 2019
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.27.036637
Subject(s) - subpixel rendering , computer science , iterative reconstruction , tomographic reconstruction , computer vision , artificial intelligence , artifact (error) , algorithm , image resolution , optics , pixel , physics
As the resolution of X-ray tomography improves, the limited long-term stability and accuracy of nanoimaging tools does not allow computing artifact-free three-dimensional (3D) reconstructions without an additional step of numerical alignment of the measured projections. However, the common iterative alignment methods are significantly more computationally demanding than a simple tomographic reconstruction of the acquired volume. Here, we address this issue and present an alignment toolkit, which exploits methods with deep-subpixel accuracy combined with a multi-resolution scheme. This leads to robust and accurate alignment with significantly reduced computational and memory requirements. The performance of the presented methods is demonstrated on simulated and measured datasets for tomography and also laminography acquisition geometries. A GPU accelerated implementation of our alignment framework is publicly available.