Yankovich, A.B., Zhang, C., Oh, A., Slater, T.J.A. ![]() |
Abstract
Image registration and non-local Poisson principal component analysis (PCA) denoising improve the quality of characteristic x-ray (EDS) spectrum imaging of Ca-stabilized Nd2/3TiO3 acquired at atomic resolution in a scanning transmission electron microscope. Image registration based on the simultaneously acquired high angle annular dark field image significantly outperforms acquisition with a long pixel dwell time or drift correction using a reference image. Non-local Poisson PCA denoising reduces noise more strongly than conventional weighted PCA while preserving atomic structure more faithfully. The reliability of and optimal internal parameters for non-local Poisson PCA denoising of EDS spectrum images is assessed using tests on phantom data.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Chemistry |
Publisher: | IOP Publishing |
ISSN: | 0957-4484 |
Last Modified: | 10 Nov 2022 10:33 |
URI: | https://orca.cardiff.ac.uk/id/eprint/147217 |
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