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What are Image Processing Methods?

  • Nobuo Tanaka
Chapter

Abstract

In TEM and STEM, the magnification (M) of images is ordinarily several million or tens of million for observing atomic columns with spacing less than 0.2 nm. The electron intensity (number of electrons onto films or detectors) is reduced by \( M^{2} \). From the viewpoint of irradiation damage of specimens, we cannot illuminate excessive electrons onto a specimen. The signal-to-noise ratio (\( = n/\sqrt n \), where n is the number of electrons) of the images is reduced in higher magnification.

Keywords

Spatial Frequency Image Intensity HRTEM Image Reciprocal Space Lattice Fringe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Japan KK 2017

Authors and Affiliations

  1. 1.Nagoya UniversityNagoyaJapan

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