全息术
降噪
相位恢复
相(物质)
小波
小波变换
计算机科学
电子全息术
噪音(视频)
材料科学
模式识别(心理学)
人工智能
还原(数学)
光学
物理
数学
图像(数学)
傅里叶变换
量子力学
几何学
作者
Takehiro Tamaoka,Yoshihiro Midoh,Kazuo Yamamoto,Shodai Aritomi,Toshiaki Tanigaki,Masao Nakamura,Koji Nakamae,M. Kawasaki,Yasukazu Murakami
出处
期刊:AIP Advances
[American Institute of Physics]
日期:2021-02-01
卷期号:11 (2)
被引量:12
摘要
Noise reduction using the wavelet hidden Markov model (WHMM) was applied to electron holograms of a LaFeO3/SrTiO3 specimen, which was subjected to phase retrieval by the phase-shifting method. A systematic study revealed the optimal conditions regarding the electron dose and number of holograms used for phase retrieval, for which the effect of denoising was most pronounced. The denoised holograms revealed the magnitude of the phase shift at the LaFeO3/SrTiO3 interface, while the original, noisy holograms did not allow for accurate measurements. The observations demonstrate the usefulness of denoising using the WHMM.
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