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  Free, flexible and fast: Orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the Python-based open source 4D-STEM analysis toolbox Pyxem

Cautaerts, N., Crout, P., Ånes, H. W., Prestat, E., Jeong, J., Dehm, G., et al. (2022). Free, flexible and fast: Orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the Python-based open source 4D-STEM analysis toolbox Pyxem. Ultramicroscopy, 237: 113517. doi:10.1016/j.ultramic.2022.113517.

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Free, flexible and fast_ Orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the Python-based open source 4D-STEM analysis toolbox Pyxem _ Elsevier Enhanced.pdf (Publisher version), 10MB
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Free, flexible and fast_ Orientation mapping using the multi-core and GPU-accelerated template matching capabilities in the Python-based open source 4D-STEM analysis toolbox Pyxem _ Elsevier Enhanced.pdf
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Open Access
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application/pdf / [MD5]
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Copyright Date:
2022
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The Authors. Published by Elsevier B.V.

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 Creators:
Cautaerts, Niels1, Author              
Crout, Phillip2, Author
Ånes, Håkon W.3, Author
Prestat, Eric4, Author
Jeong, Jiwon1, Author              
Dehm, Gerhard5, Author              
Liebscher, Christian1, Author              
Affiliations:
1Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863399              
2Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom, ou_persistent22              
3Department of Materials Science and Engineering, NTNU, Alfred Getz vei 2, N-7491, Trondheim, Norway, ou_persistent22              
4Department of Materials, University of Manchester, The Mill E2, M13 9PL, Manchester, United Kingdom, ou_persistent22              
5Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863398              

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Free keywords: Crystal orientation; Electron diffraction; Electrons; High level languages; High resolution transmission electron microscopy; Mapping; Nanocrystalline materials; Nanocrystals; Python; Scanning electron microscopy; Template matching, Brute-force approach; CPU cores; Graphical processing unit acceleration; Graphical processing units; Multi-cores; Nanobeam electron diffraction; Open-source; Orientation mapping; Precession electron diffractions; Scanning transmission electron microscopy, Graphics processing unit, nanocrystal, acceleration; Article; crystal; data visualization; ecosystem; electron diffraction; four-dimensional imaging; graphical processing unit; image processing; open source software; performance; precipitation; reliability; reproducibility; scanning transmission electron microscopy; validation process; velocity
 Abstract: This work presents the new template matching capabilities implemented in Pyxem, an open source Python library for analyzing four-dimensional scanning transmission electron microscopy (4D-STEM) data. Template matching is a brute force approach for deriving local crystal orientations. It works by comparing a library of simulated diffraction patterns to experimental patterns collected with nano-beam and precession electron diffraction (NBED and PED). This is a computationally demanding task, therefore the implementation combines efficiency and scalability by utilizing multiple CPU cores or a graphical processing unit (GPU). The code is built on top of the scientific Python ecosystem, and is designed to support custom and reproducible workflows that combine the image processing, template library generation, indexation and visualization all in one environment. The tools are agnostic to file size and format, which is significant in light of the increased adoption of pixelated detectors from different manufacturers. This paper details the implementation and validation of the method. The method is illustrated by calculating orientation maps of nanocrystalline materials and precipitates embedded in a crystalline matrix. The combination of speed and flexibility opens the door for automated parameter studies and real-time on-line orientation mapping inside the TEM. © 2022 The Authors

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Language(s): eng - English
 Dates: 2022-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.ultramic.2022.113517
 Degree: -

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Title: Ultramicroscopy
  Abbreviation : Ultramicroscopy
Source Genre: Journal
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Publ. Info: Amsterdam : North-Holland
Pages: 22 Volume / Issue: 237 Sequence Number: 113517 Start / End Page: - Identifier: ISSN: 0304-3991
CoNE: https://pure.mpg.de/cone/journals/resource/954925512451