利用小波隐马尔可夫模型降低薄箔钕铁硼试样电子全息观测数据的噪声

Q3 Immunology and Microbiology

Applied Microscopy Pub Date : 2024-04-17 DOI:10.1186/s42649-024-00097-w

Sujin Lee, Yoshihiro Midoh, Yuto Tomita, Takehiro Tamaoka, Mitsunari Auchi, Taisuke Sasaki, Yasukazu Murakami

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引用次数: 0

摘要

在本研究中，我们基于小波隐马尔可夫模型（WHMM）研究了电子全息摄影中的降噪效果，该模型可将微弱信号与噪声合理分离。钕铁硼薄箔的电子全息观测结果表明，降噪方法抑制了相位检索产生的人为相位不连续性。从峰值信噪比可以看出，对于干涉条纹间距较窄的观测结果，去噪效果显著，而干涉条纹间距是电子全息技术空间分辨率的关键参数。这些结果为提高电子全息研究的精度提供了重要信息。

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Noise reduction of electron holography observations for a thin-foiled Nd-Fe-B specimen using the wavelet hidden Markov model

In this study, we investigate the effectiveness of noise reduction in electron holography, based on the wavelet hidden Markov model (WHMM), which allows 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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来源期刊

Applied Microscopy Immunology and Microbiology-Applied Microbiology and Biotechnology

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Applied Microscopy is a peer-reviewed journal sponsored by the Korean Society of Microscopy. The journal covers all the interdisciplinary fields of technological developments in new microscopy methods and instrumentation and their applications to biological or materials science for determining structure and chemistry. ISSN: 22875123, 22874445.