Removal of Illumination Gradient in TEM Images. Algorithm Implementation in TEM Imaging&Analysis Software

A method is proposed to solve the widespread problem in TEM imaging related to the illumination gradient. The illumination gradient is eliminated using line-by-line processing of the initial image in the 16-bit format and its transformation into an image with a narrower grayscale range [0–255]. The...

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Bibliographic Details
Published inCrystallography reports Vol. 66; no. 6; pp. 1156 - 1163
Main Author Zavodov, A. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2021
Springer Nature B.V
Subjects
Algorithms
Crystallographic Software
Crystallography and Scattering Methods
Illumination
Image contrast
Image reconstruction
Physics
Physics and Astronomy
Polynomials
Software
Online AccessGet full text
ISSN1063-7745
1562-689X
DOI10.1134/S1063774521040234

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Summary:A method is proposed to solve the widespread problem in TEM imaging related to the illumination gradient. The illumination gradient is eliminated using line-by-line processing of the initial image in the 16-bit format and its transformation into an image with a narrower grayscale range [0–255]. The influence of image inhomogeneities on the processing result is eliminated using polynomial approximation of the initial values of average intensity of the lines and the width of intensity range ( ). The developed algorithm completely eliminates the illumination gradient in images by reconstructing details in the under- and overexposed regions and increasing the contrast of individual image parts. The entire code of the image-reconstruction algorithm for the TEM Imaging&Analysis software is presented.
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ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774521040234