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Reconstruction of randomly and partially sampled STEM spectrum-images

Monier, Etienne and Oberlin, Thomas and Brun, Nathalie and Tencé, Marcel and Dobigeon, Nicolas Reconstruction of randomly and partially sampled STEM spectrum-images. (2017) In: Microscopy and Microanalysis Meeting (M&M 2017), 6 August 2017 - 10 August 2017 (Saint-Louis, Missouri, United States).

(Document in English)

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Official URL: http://doi.org/10.1017/S1431927617001532


Scanning transmission electron microscopy (STEM) offers the ability to acquire several single- and multi-channels signals generated simultaneously for each probe position: cathodoluminescence (CL), electron energy loss spectroscopy (EELS) and high-angle annular dark-field imaging (HAADF). However, in some cases, sensitive samples (e.g., biological samples or molecular structures) may suffer from irradiation damages during acquisition. As a consequence, it is often necessary to reduce probe current or dwell time, which could significantly lower the signal-to-noise ratio. Another approach consists in acquiring only a subset of pixels randomly chosen in a given region of interest. This particular experimental set-up has been implemented on the STEM VG HB501 (LPS, Orsay, France), with the beam following a predetermined random path. The reconstruction of HAADF images is then straightforward with well known algorithms. However, when reconstructing the associated spectrum image, the high number of energy bands makes the problem computationally expensive.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Microscopy and Microanalysis Volume 23 Supplément S1 ISSN: 1431-9276 https://www.cambridge.org/core/journals/microscopy-and-microanalysis/article/reconstruction-of-randomly-and-partially-sampled-stem-spectrumimages/075370ACDD54D20D2F99693B1F0CF7EC#
HAL Id:hal-03658140
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Université Paris-Sud 11 (FRANCE)
Laboratory name:
Deposited On:08 Nov 2018 10:35

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