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An expanded approach to noise reduction from high-resolution STEM images based on the maximum entropy method

Author:
Nakanishi, N  Kotaka, Y  Yamazaki, T  


Journal:
ULTRAMICROSCOPY


Issue Date:
2006


Abstract(summary):

An expanded use of the maximum entropy method (MEM) is suggested to reduce noise from an experimental high-angle annular dark-field (HAADF) scanning transmission electron microscope (STEM) image. The MEM is combined with an estimate of the standard deviation of noise from an experimental HAADF STEM image and low-pass filtering using the information limit for an incoherent STEM image. Consequently, the present method has just one parameter of a Lagrange multiplier. It is demonstrated that the present method can reduce noise efficiently in high-resolution HAADF STEM images. (c) 2005 Elsevier B.V. All rights reserved.


Page:
233---239


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