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Description:

In this study, we investigate the effectiveness of noise reduction in electron holography, based on the wavelet hidden Markov model (WHMM), which allows for the reasonable separation of weak signals from noise. Electron holography observations from a Nd2Fe14B thin foil showed that the noise reduction method suppressed artificial phase discontinuities generated by phase retrieval. From the peak signal-to-noise ratio, it was seen that the impact of denoising was significant for observations with a narrow spacing of interference fringes, which is a key parameter for the spatial resolution of electron holography. These results provide essential information for improving the precision of electron holography studies.

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• Creative Commons BY Attribution 4.0 International
  

Keyword: Noise reduction, Wavelet hidden Markov model, Electron holography, Nd-Fe- B magnet

Date published: 2024-04-17

Publisher: Springer Science and Business Media LLC

Journal:

• Applied Microscopy (ISSN: 22874445) vol. 54 issue. 1 4

Funding:

• Japan Society for the Promotion of Science 21H04623
• Japan Society for the Promotion of Science 22K18904

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5240

First published URL: https://doi.org/10.1186/s42649-024-00097-w

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Updated at: 2025-01-07 08:30:37 +0900

Published on MDR: 2025-01-07 08:30:48 +0900