SIM-STEM Lab: Incorporating Compressed Sensing Theory for Fast STEM Simulation

Robinson, Alex W ORCID: 0000-0002-1901-2509, Nicholls, Daniel ORCID: 0000-0003-1677-701X, Wells, Jack, Moshtaghpour, Amirafshar ORCID: 0000-0002-6751-2698, Kirkland, Angus and Browning, Nigel D ORCID: 0000-0003-0491-251X (2022) SIM-STEM Lab: Incorporating Compressed Sensing Theory for Fast STEM Simulation. ULTRAMICROSCOPY, 242. 113625-.

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Official URL: http://dx.doi.org/10.1016/j.ultramic.2022.113625

Abstract

Recently it has been shown that precise dose control and an increase in the overall acquisition speed of atomic resolution scanning transmission electron microscope (STEM) images can be achieved by acquiring only a small fraction of the pixels in the image experimentally and then reconstructing the full image using an inpainting algorithm. In this paper, we apply the same inpainting approach (a form of compressed sensing) to simulated, sub-sampled atomic resolution STEM images. We find that it is possible to significantly sub-sample the area that is simulated, the number of g-vectors contributing the image, and the number of frozen phonon configurations contributing to the final image while still producing an acceptable fit to a fully sampled simulation. Here we discuss the parameters that we use and how the resulting simulations can be quantifiably compared to the full simulations. As with any Compressed Sensing methodology, care must be taken to ensure that isolated events are not excluded from the process, but the observed increase in simulation speed provides significant opportunities for real time simulations, image classification and analytics to be performed as a supplement to experiments on a microscope to be developed in the future.

Item Type:	Article
Uncontrolled Keywords:	Bioengineering, Stem Cell Research, Generic health relevance
Depositing User:	Symplectic Admin
Date Deposited:	16 Nov 2022 16:07
Last Modified:	15 Mar 2024 13:43
DOI:	10.1016/j.ultramic.2022.113625
Open Access URL:	https://arxiv.org/abs/2207.10984
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3166234