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Published August 13, 2020 | Version 0.5.1
Software Open

LiberTEM/LiberTEM: 0.5.1

  • 1. Jülich Research Centre, Ernst Ruska Centre
  • 2. RWTH Aachen University, Jülich Research Centre, Ernst Ruska Centre
  • 3. APJ Abdul Kalam Technological University
  • 4. APJ Abdul Kalam Technical University
  • 5. Chandigarh University
  • 6. Siliguri Institute of Technology
  • 7. Jadavpur University
  • 8. Direct Electron
  • 9. University of Antwerp
  • 10. Lawrence Berkeley National Laboratory
  • 11. Monash University eResearch Centre
  • 12. ETH Zürich
  • 13. Columbia University

Description

Homepage: https://libertem.github.io/LiberTEM/
GitHub repository: https://github.com/LiberTEM/LiberTEM/
PyPI: https://pypi.org/project/libertem/

LiberTEM is an open source platform for high-throughput distributed processing of large-scale binary data sets using a simplified MapReduce programming model. The current focus is pixelated scanning transmission electron microscopy (STEM) and scanning electron beam diffraction data.

It is designed for high throughput and scalability on PCs, single server nodes, clusters and cloud services. On clusters it can use fast distributed local storage on high-performance SSDs. That way it achieves very high aggregate IO performance on a compact and cost-efficient system built from stock components.

LiberTEM is supported on Linux, Mac OS X and Windows. Other platforms that allow installation of Python 3 and the required packages will likely work as well. The GUI is running in a web browser.

Installation

The short version:

$ virtualenv -p python3 ~/libertem-venv/
$ source ~/libertem-venv/bin/activate
(libertem) $ pip install "libertem[torch]"

Please see our documentation for details!

Deployment as a single-node system for a local user is thoroughly tested and can be considered stable. Deployment on a cluster is experimental and still requires some additional work, see Issue #105.

Applications

Please see the applications section of our documentation for details!

The Python API and user-defined functions (UDFs) can be used for more complex operations with arbitrary masks and other features like data export. There are example Jupyter notebooks available in the examples directory. If you are having trouble running the examples, please let us know, either by filing an issue or by joining our Gitter chat.

LiberTEM is suitable as a high-performance processing backend for other applications, including live data streams. Contact us if you are interested!

LiberTEM is evolving rapidly and prioritizes features following user demand and contributions. In the future we'd like to implement live acquisition, and more analysis methods for all applications of pixelated STEM and other large-scale detector data. If you like to influence the direction this project is taking, or if you'd like to contribute, please join our gitter chat and our general mailing list.

File formats

LiberTEM currently opens most file formats used for pixelated STEM. See our general information on loading data and format-specific documentation for more information!

  • Raw binary files
  • Thermo Fisher EMPAD detector files
  • Quantum Detectors MIB format
  • Nanomegas .blo block files
  • Direct Electron DE5 files (HDF5-based) for DE-Series detectors
  • Gatan K2 IS raw format
  • Stacks of Gatan DM3 and DM4 files (via openNCEM)
  • FRMS6 from PNDetector pnCCD cameras (currently alpha, gain correction still needs UI changes)
  • FEI SER files (via openNCEM)
  • HDF5-based formats such as Hyperspy files, NeXus and EMD
  • Please contact us if you are interested in support for an additional format!

License

LiberTEM is licensed under GPLv3. The I/O parts are also available under the MIT license, please see LICENSE files in the subdirectories for details.

Notes

This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 856538).

We gratefully acknowledge funding from the Initiative and Network Fund of the Helmholtz Association within the Helmholtz Young Investigator Group moreSTEM under Contract No. VH-NG-1317 at Forschungszentrum Jülich in Germany.

We gratefully acknowledge funding from the Information & Data Science Pilot Project 'Ptychography 4.0' of the Helmholtz Association.

We kindly acknowledge funding from Google Summer of Code 2019 under the umbrella of the Python software foundation.

STEMx equipment and software for 4D STEM data acquisition with K2 IS camera courtesy of Gatan Inc.

Forschungszentrum Jülich is supporting LiberTEM with funding for personnel, access to its infrastructure and administrative support.

Files

Files (31.4 MB)

Name Size Download all
md5:65a98d66990f7602d903763da9803bfe
2.6 MB Download
md5:0e419391ceccb10f385fb1f825973dcd
2.8 MB Download
md5:ec650a3cb083890e915c646eec4ee270
26.0 MB Download

Additional details

Funding

VIDEO – Versatile and Innovative Detector for Electron Optics 780487
European Commission
CritCat – Towards Replacement of Critical Catalyst Materials by Improved Nanoparticle Control and Rational Design 686053
European Commission
ESTEEM3 – Enabling Science and Technology through European Electron Microscopy 823717
European Commission

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