Simulation-Trained Sparse Coding for High-Precision Phase Imaging in Low-Dose Electron Holography
Simulation-Trained Sparse Coding for High-Precision Phase Imaging in Low-Dose Electron Holography
复制标题
用于低剂量电子全息术中高精度相位成像的仿真训练稀疏编码
DOI:
10.1017/s1431927620001452
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发表时间:
2020
影响因子:
2.8
通讯作者:
Yamamoto Kazuo
中科院分区:
文献类型:
--
作者:
Anada Satoshi;Nomura Yuki;Hirayama Tsukasa;Yamamoto Kazuo
We broaden the applicability of sparse coding, a machine learning method, to low-dose electron holography by using simulated holograms for learning and validation processes. The holograms, with shot noise, are prepared to generate a model, or a dictionary, that includes basic features representing interference fringes. The dictionary is applied to sparse representations of other simulated holograms with various signal-to-noise ratios (SNRs). Results demonstrate that this approach successfully removes noise for holograms with an extremely small SNR of 0.10, and that the denoised holograms provide the accurate phase distribution. Furthermore, this study demonstrates that the dictionary learned from the simulated holograms can be applied to denoising of experimental holograms of a p–n junction specimen recorded with different exposure times. The results indicate that the simulation-trained sparse coding is suitable for use over a wide range of imaging conditions, in particular for observing electron beam-sensitive materials.
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DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
H. Lichte;D. Geiger;A. Harscher;E. Heindl;M. Lehmann;Dimitrios Malamidis;A. Orchowski;W. Rau
通讯作者:
W. Rau
影响因子:
2.2
作者:
RU, Q;LAI, G;TONOMURA, A
通讯作者:
TONOMURA, A
影响因子:
8.6
作者:
Matsuda;Hasegawa;Igarashi;Kobayashi;Naito;Kajiyama;Endo;Osakabe;Tonomura;Aoki
通讯作者:
Aoki
影响因子:
4
作者:
Q. Ru;T. Tanji;A. Tonomura
通讯作者:
A. Tonomura
影响因子:
3.7
作者:
A. Tonomura;T. Matsuda;H. Tanabe;N. Osakabe;J. Endo;A. Fukuhara;Kohsei Shinagawa;H. Fujiwara
通讯作者:
H. Fujiwara