Johannes Soltwedel's Avatar

Johannes Soltwedel

@jo-soltwedel

Research software engineer @gerbi-gmb.de for all things #OME-ZARR, #NGFF, FAIR data. Physicist, Python code-jockey, train enthusiast.

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14.11.2024
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Latest posts by Johannes Soltwedel @jo-soltwedel

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24.02.2026 18:32 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Yep, it lags a little. But still quite impressive considering that each "pixel" is a 150 MPixel multires image. Overall the total number of 'adressable' pixels in this 2D image are 225x225x150 Mpix = 7.6 Tera pixels. #ImageJ #Fiji #BigDataViewer

17.10.2024 08:36 πŸ‘ 19 πŸ” 10 πŸ’¬ 2 πŸ“Œ 0
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GitHub - imaging-formats/bffile: Modern Bio-Formats wrapper with clean lazy Python API Modern Bio-Formats wrapper with clean lazy Python API - imaging-formats/bffile

Rewrote my Python bioformats wrapper (from aicsimageio/bioio) as a standalone package:

- fully bootstrapped Java setup (just pip install)
- lazy, repeatably-indexable Array object
- fully spec-compliant OME-Zarr group obj.
- xarray/dask exports

github.com/imaging-form...
v0.0.rc1 on PyPI

16.02.2026 21:06 πŸ‘ 60 πŸ” 23 πŸ’¬ 1 πŸ“Œ 1
GitHub - will-moore/napari-ome-zarr at v0.6.dev3 A reader for zarr backed OME-NGFF images. Contribute to will-moore/napari-ome-zarr development by creating an account on GitHub.

Exactly! It's all still a bit in experimental mode since the 0.6 spec hasn't been released, but @will-j-moore.bsky.social has a working napari-plugin to read this kind of data + transforms over here: github.com/will-moore/n...

16.02.2026 22:14 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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I'll never get tired of lazily browsing elastix-coregistered #WSI data in @napari.org using the upcoming @openmicroscopy.org ome-zarr @zarr.dev format version that allows to specify and read transformations directly from the image data itself.

Data source: rodare.hzdr.de/record/3131

12.02.2026 17:11 πŸ‘ 26 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0

Great news for German #BioImaging! 🀝
#GerBI & #de.NBI just signed an MoU to launch a GerBI #OMERO platform. de.NBI brings the cloud, GerBI handles ops, support & community.
🧩 A testbed + training hub for everyone. Stronger data, stronger science.
More soon!

22.01.2026 13:59 πŸ‘ 9 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
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On the Tibetan plateau, China has installed a 16-17 GW mega solar plant that is turning an alpine desert into a β€œmicro-oasis”: more moisture, more grass, and soils with more carbon under 64 kmΒ² of pan... High on the Tibetan Plateau, a vast field of solar panels is not only feeding China’s power grid. According to new research, it is also gently reshaping a

On the Tibetan plateau, China has installed a 16-17 GW mega solar plant that is turning an alpine desert into a β€œmicro-oasis”: more moisture, more grass, and soils with more carbon under 64 kmΒ² of panels
www.ecoticias.com/en/on-the-ti...

31.01.2026 18:16 πŸ‘ 4524 πŸ” 1397 πŸ’¬ 213 πŸ“Œ 153
A large mural on a modern brick building portrays an anthropomorphic fox in a letterman jacket holding a huge red flower, surrounded by oversized blossoms and butterflies in a dreamy garden scene.

A large mural on a modern brick building portrays an anthropomorphic fox in a letterman jacket holding a huge red flower, surrounded by oversized blossoms and butterflies in a dreamy garden scene.

A striking street art mural on a tall concrete building with stacked curved balconies features large, realistic grey hands gripping a thick white pole or rope against a deep blue background with abstract white bird shapes and dots, under a clear blue sky with clouds.

A striking street art mural on a tall concrete building with stacked curved balconies features large, realistic grey hands gripping a thick white pole or rope against a deep blue background with abstract white bird shapes and dots, under a clear blue sky with clouds.

A tall building mural shows a cartoon-style hippopotamus riding a red motorcycle with a crocodile and other whimsical animals stacked above it, all painted in dynamic, saturated colours.

A tall building mural shows a cartoon-style hippopotamus riding a red motorcycle with a crocodile and other whimsical animals stacked above it, all painted in dynamic, saturated colours.

A detailed mural on a tall brick wall shows a steampunk-style airship with a huge spherical balloon and a wooden ship full of chimneys and pipes, floating above painted waves.

A detailed mural on a tall brick wall shows a steampunk-style airship with a huge spherical balloon and a wooden ship full of chimneys and pipes, floating above painted waves.

In 2024, seven European street artists worked with local communities to transform facades across Belgium into powerful works of art.

These reflect visions of a sustainable, fair, innovative, and democratic Europe.

01.02.2026 08:46 πŸ‘ 219 πŸ” 50 πŸ’¬ 5 πŸ“Œ 0
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Globally, no single day in 2025 was cooler than its 1991-2020 average.
climate.copernicus.eu/global-clima...

14.01.2026 12:44 πŸ‘ 1013 πŸ” 681 πŸ’¬ 20 πŸ“Œ 74
Smart microscopy, computer vision, and controlling cells with light -- my PhD thesis in 3 minutes
Smart microscopy, computer vision, and controlling cells with light -- my PhD thesis in 3 minutes YouTube video by Pertz Lab

If you have 3 minutes, watch this video on the PhD work of @lhinderling.bsky.social. From ChatGPT-controlled smart microscopy to computer vision for easy image segmentation, and new insights into RAS–MAPK signaling. This earned a Faculty Prize for his thesis.
www.youtube.com/watch?v=so0f...

12.01.2026 09:33 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

So happy to see my #sciart featured in the @ibidicells.bsky.social 2025 Calendar πŸ₯³

10.05.2025 08:53 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Engineering the development of the pancreas Researchers found that the shape of the fluid-filled cavities in the developing pancreas is controlled by pressure and the rate cells divide.

With Byung Ho Lee and Kana Fuji as first/lead authors, @anne-grapin.bsky.social group, @utokyoofficial.bsky.social, Inst. of Physics of Academia Sinica, & @igbmc.bsky.social found the shape of lumens in the developing pancreas is controlled by pressure & proliferation. www.mpi-cbg.de/news-outreac...

09.01.2026 12:17 πŸ‘ 34 πŸ” 11 πŸ’¬ 1 πŸ“Œ 2
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NGFF weekly dev update thread 🏁 Sprint to 0.6 🏁 Dear NGFF-community, it's been some time since the last release of a mjor version of the NGFF-specification. Since then, many of you engaged with the community which resulted in a lo...

🚨Gearing up for #NGFF 0.6! 🚨

Help us give this a final push over the finish line and join us in ironing out the last flaws on the way!

More information here πŸ‘‡
forum.image.sc/t/ngff-weekl...

09.01.2026 13:48 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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My lab @poldresden.bsky.social is now CLOSED! The fabulous @sanikajah.bsky.social has left (defense soon). The lab @mbisg.bsky.social in SG is now 1yr old and growing!
PhD students apply here (Jan 12): www.mbi.nus.edu.sg/education/gr...
Undergrads (Jan 31): www.mbi.nus.edu.sg/education/mu...

28.11.2025 02:51 πŸ‘ 22 πŸ” 4 πŸ’¬ 1 πŸ“Œ 2
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Deep Learning for Microscopy Image Analysis Topics The following will be covered extensively during lectures, exercises, and project work: Image denoising and restoration (fully supervised and self-supervised) Image translation (e.g.,

🚨 Alarm!!! 🚨
AI/ML course for microscopy image analysis!!! 🧐
In 2026 at Janelia (@hhmijanelia.bsky.social), no tuition, housing and meals provided! Isn’t that borderline unbelievable?!?

20 students, ~14 TAs and lecturers
πŸ—“οΈ June 4-18 2026

✍️ Jan 15 2026 ✍️

πŸ” pls!!

www.janelia.org/you-janelia/...

28.12.2025 19:05 πŸ‘ 78 πŸ” 62 πŸ’¬ 0 πŸ“Œ 3

Up next: Features and tables!

07.01.2026 14:43 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
PortrΓ€tfoto von Sebastian Schellhammer, das auf einem Boot auf offener See aufgenommen wurde.

PortrΓ€tfoto von Sebastian Schellhammer, das auf einem Boot auf offener See aufgenommen wurde.

Engagierte HochschullehΒ­re: πŸ‘¨β€πŸ« Dr. Sebastian Schellhammer vom Institut fΓΌr Angewandte Physik der #TUDresden ist in die Akademie Ausgezeichnete Hochschullehre e.V. aufgenommen worden. Schellhammer entwickelt innovative LehransΓ€tze & fΓΆrdert den kollegialen Austausch.
ℹ️ tu-dresden.de/tu-dresden/n...

07.01.2026 12:40 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Kind of flew under the radar, BUT we released napari-omero 0.6 recently πŸ₯³ @openmicroscopy.org
You can now down-/upload ROIs from and to OMERO inside @napari.org 🀩Bringing the power of napari for annotation to the management of OMERO :)
Thanks @psobolewskiphd.bsky.social and other maintainers!

07.01.2026 13:27 πŸ‘ 25 πŸ” 11 πŸ’¬ 2 πŸ“Œ 0
A computer terminal running some automated tests and an icon reflecting the progress of the tests

A computer terminal running some automated tests and an icon reflecting the progress of the tests

Ha! Just noticed that my terminal now (has it always?) shows a small loading bar 🚧 when @pytest.org tests are running! Cool :)

07.01.2026 08:21 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Beautiful!

29.12.2025 12:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Do you love quantifying animal behavior as much as we do? We have just the tool for you! Presenting #OCTRON - a pipeline that helps you create rich annotation data and enables training of custom segmentation models. Have a look, particularly if you work with non-model / invertebrate organisms!

23.12.2025 19:52 πŸ‘ 101 πŸ” 41 πŸ’¬ 7 πŸ“Œ 10

Stefan Dvoretskii, Anwai Archit, Constantin Pape, Josh Moore, Marco Nolden: BioimageAIpub: a toolbox for AI-ready bioimaging data publishing https://arxiv.org/abs/2512.15820 https://arxiv.org/pdf/2512.15820 https://arxiv.org/html/2512.15820

19.12.2025 06:35 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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#NFDI4BIOIMAGEfromAtoZ - P as in Pixels.
In biological microscopy, #pixels are more than just image dots – they are quantitative measurements that encode spatial and intensity information at the core of high-dimensional bioimaging data.

18.12.2025 12:02 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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🚨 PhD Position Available 🚨
I’m recruiting a PhD student to join my lab at the Multiscale Imaging Centre (MIC), MΓΌnster, Germany.

www.bischofflab.com/jobs

Fully funded βœ…
#Cellbio #Morphogenesis #Microscopy
#Drosophila #PhD
(Details Below)

Original Posting:
stellen.uni-muenster.de/jobposting/d...

15.12.2025 12:20 πŸ‘ 44 πŸ” 36 πŸ’¬ 2 πŸ“Œ 4
Microscopy Nodes: handling large biological volumes β€” Blender Conference 2025
Microscopy Nodes: handling large biological volumes β€” Blender Conference 2025 YouTube video by Blender

I gave a talk at Blender Conference yesterday, showing how biological volumes work, and how to visualize them in Blender πŸ˜‹ youtu.be/WPajSWX730o?... #bcon25

19.09.2025 07:35 πŸ‘ 74 πŸ” 20 πŸ’¬ 5 πŸ“Œ 2
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We just released a new major version of TrackMate (v8), the cell and organelle tracking plugin of Fiji.

It ships many new features, detailed below, but that are articulated around the following:

20.11.2025 11:42 πŸ‘ 182 πŸ” 76 πŸ’¬ 4 πŸ“Œ 7
Photo taken at the Neues Museum in Berlin (which luckily has elevators!). It shows lots of stairs both left and right and several floors with people walking up. Some windows at the top.

Photo taken at the Neues Museum in Berlin (which luckily has elevators!). It shows lots of stairs both left and right and several floors with people walking up. Some windows at the top.

Can we please discuss accessibility at conferences?

When organizers and schedules assume that everyone can walk fast and climb stairs, people with mobility issues (visible or invisible) might feel excluded.

/

20.11.2025 08:08 πŸ‘ 278 πŸ” 78 πŸ’¬ 9 πŸ“Œ 8
Hackathon participants group picture

Hackathon participants group picture

We had an amazing OME-NGFF hackathon last week, Wednesday to Friday, following the inspiring OME-NGFF symposium. What a fantastic week! It’s hard to describe how motivating it is to be surrounded by so many talented, curious & friendly people who care deeply about open, FAIR bioimaging data.
1/14 🧡

17.11.2025 13:22 πŸ‘ 41 πŸ” 16 πŸ’¬ 2 πŸ“Œ 1
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An Introduction to OME-Zarr for Big Bioimaging Data

Today I'm announcing a new digital textbook πŸ“–πŸ–₯️, "An Introduction to OME-Zarr for Big Bioimaging Data".

ome-zarr-book.readthedocs.io

04.11.2025 15:33 πŸ‘ 30 πŸ” 16 πŸ’¬ 2 πŸ“Œ 0
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Hopping on the ✨ πŸš… to Dresden after a week of #OME_NGFF_Hackathon. Looking forward till next time πŸ˜ƒ

14.11.2025 19:08 πŸ‘ 9 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0