用于脉冲计数 STEM 成像的泊松去噪新方法

IF 2.1 3区工程技术 Q2 MICROSCOPY

Ultramicroscopy Pub Date : 2024-05-27 DOI:10.1016/j.ultramic.2024.113996

Taichi Kusumi , Shun Katakami , Ryo Ishikawa , Kazuaki Kawahara , Tiarnan Mullarkey , Julie Marie Bekkevold , Jonathan J.P. Peters , Lewys Jones , Naoya Shibata , Masato Okada

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引用次数: 0

摘要

随着近年来电子显微镜探测器的发展，即使是闪烁体型的探测器，也可以通过加入脉冲计数模块来直接计算每个像素的电子数。为了优化电子计数成像的去噪方法，我们在本研究中提出了一种用于原子分辨率扫描透射电子显微镜图像的泊松去噪方法。我们的方法基于马尔可夫随机场模型和贝叶斯推理，可将电子剂量降低约 15 倍或更低。此外，我们还证明了不整合多幅图像的重建方法比整合一幅图像的重建方法效果更好。

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New Poisson denoising method for pulse-count STEM imaging

With the recent progress in the development of detectors in electron microscopy, it has become possible to directly count the number of electrons per pixel, even with a scintillator-type detector, by incorporating a pulse-counting module. To optimize a denoising method for electron counting imaging, in this study, we propose a Poisson denoising method for atomic-resolution scanning transmission electron microscopy images. Our method is based on the Markov random field model and Bayesian inference, and we can reduce the electron dose by a factor of about 15 times or further below. Moreover, we showed that the method of reconstruction from multiple images without integrating them performs better than that from an integrated image.

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来源期刊

Ultramicroscopy 工程技术-显微镜技术

CiteScore

4.60

自引率

13.60%

发文量

117

审稿时长

5.3 months

期刊介绍： Ultramicroscopy is an established journal that provides a forum for the publication of original research papers, invited reviews and rapid communications. The scope of Ultramicroscopy is to describe advances in instrumentation, methods and theory related to all modes of microscopical imaging, diffraction and spectroscopy in the life and physical sciences.