Guillaume Witz's Avatar

Guillaume Witz

@guiwitz.bsky.social

Curious scientist and classical music enthusiast. Currently Bioimage Analyst and Data Scientist at the Data Science Lab of the University of Bern. Previously @epfl, @harvard, @biozentrum

574 Followers  |  263 Following  |  48 Posts  |  Joined: 28.11.2023  |  2.0557

Latest posts by guiwitz.bsky.social on Bluesky

Sibelius : Concerto pour violon (Hilary Hahn)
YouTube video by France Musique concerts Sibelius : Concerto pour violon (Hilary Hahn)

The violin concerto! Many great recordings but for me the best is this live from Hilary Hahn and Mikko Franck. Great chemistry, technical perfection, mesmerizing to watch! youtu.be/J0w0t4Qn6LY

07.02.2026 16:08 โ€” ๐Ÿ‘ 4    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Sounds like this could be a very cool (in all meanings of the word ๐Ÿ˜…) postdoc!

21.01.2026 13:13 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Laboratory Engineer (Senior), in Advanced Imaging, 1.5.2026-31.12.2028

๐Ÿšจ Job Alert! ๐Ÿšจ

We have an opening at our Microscopy Core Facility in Turku ๐Ÿ‡ซ๐Ÿ‡ฎ.
If you love imaging ๐Ÿ”ฌ and helping scientists succeed, we want you! ๐Ÿ‘‡

abo.rekrytointi.com/paikat/index...

#Microscopy #ScienceJobs #CoreFacility #Imaging
@turkubioscience.bsky.social

15.01.2026 14:04 โ€” ๐Ÿ‘ 48    ๐Ÿ” 73    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 2

Time is running out to apply for this year's @royalmicrosoc.bsky.social Intro to Image Analysis course in Cardiff - deadline is tomorrow!

Spread the word!

15.01.2026 09:54 โ€” ๐Ÿ‘ 6    ๐Ÿ” 6    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Tracking coordinated cellular dynamics directly from images -- New method paper by labmates @bgraedel.bsky.social & @macdobry.bsky.social ! Python package & @napari.org plugin, all the good stuff:

Paper: doi.org/10.1242/jcs....
Code: github.com/pertzlab/arc...
Plugin: github.com/pertzlab/arc...

18.12.2025 16:16 โ€” ๐Ÿ‘ 47    ๐Ÿ” 17    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Python package managers: uv vs pixi? When I talk to people about Python package management in 2025 I see the following tools in active use; uv, pixi, pip, conda, mamba, micromamba and poetry. There may be others, but I donโ€™t hear much ab...

For Python package management I use a mixture of pixi, uv and conda depending on the task I'm doing.

I wrote up a long form post about the history of these tools, why each one exists, and why I settled on these choices in my workflow.

jacobtomlinson.dev/posts/2025/p...

18.11.2025 12:56 โ€” ๐Ÿ‘ 40    ๐Ÿ” 21    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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! Itโ€™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 ๐Ÿงต

17.11.2025 13:22 โ€” ๐Ÿ‘ 41    ๐Ÿ” 16    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1
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Community There are several different ways to be a part of the napari community. From being a code or documentation contributor, to creating educational content or examples, you are welcome to help develop and ...

Community information is here napari.org/stable/commu...

31.10.2025 03:17 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Special edition of the napari logo for Halloween. The island is white and looks like a ghost, and there are spiderwebs.

Special edition of the napari logo for Halloween. The island is white and looks like a ghost, and there are spiderwebs.

Happy Halloween from the napari team!

31.10.2025 14:20 โ€” ๐Ÿ‘ 19    ๐Ÿ” 7    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

It was a fantastic opportunity to finally meet the people behind this software that I have been using for years and is so important for my work! A big thank you to all core developers who were so welcoming, and patiently guided participants in their attempts to contribute back to napari!

30.10.2025 16:14 โ€” ๐Ÿ‘ 10    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

This was a very interesting talk! If you work in a core facility youโ€™ll find plenty of good ideas about organisation and/or be reassured that certain things, like planning workload, are difficult for everyone, even the best organized.

13.10.2025 14:26 โ€” ๐Ÿ‘ 4    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Hi all. This is the recording of the online seminar I gave following the kind invitation of #GLOBIAS.

I share what we have learned delivering #BioimageAnalysis services in the IAH core facility of the @institutpasteur.bsky.social

research.pasteur.fr/en/team/imag...
โฌ‡๏ธ

13.10.2025 08:10 โ€” ๐Ÿ‘ 39    ๐Ÿ” 14    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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Research engineer in Bioimage Analysis for the researchers of the inIdEx FORMULA Hi all We are looking for a bioimage analysis to work in an image analysis core facility in beautiful Paris. Can I ask you to share this opportunity with your networks? The position is in the Instit...

Job alert!

We are looking for a bioimage analysis to work in an image analysis core facility in beautiful Paris. Can I ask you to share this opportunity with your networks?

See also on the forum:
forum.image.sc/t/research-e...

07.10.2025 12:39 โ€” ๐Ÿ‘ 62    ๐Ÿ” 80    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 8
Image depicting the napari viewer in grid mode with scale bars and color bars enabled

Image depicting the napari viewer in grid mode with scale bars and color bars enabled

napari 0.6.5 is out! ๐Ÿš€

Rapid-fire highlights are: colorbar overlay, custom startup script, and better and prettier documentation! Check out the full release notes here: https://napari.org/dev/release/release_0_6_5.html

02.10.2025 11:44 โ€” ๐Ÿ‘ 12    ๐Ÿ” 7    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Bioimage Analysis Specialist | King's College London

BioImage analysis friends - King's are recruiting for a full-time, permanent facility position! Come and work with fun microscopes and fun people (and me!) - please share! www.kcl.ac.uk/jobs/126345-...

29.09.2025 09:48 โ€” ๐Ÿ‘ 63    ๐Ÿ” 79    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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๐Ÿ“ข Open 4-year PhD Position in Deep Learning for Bioimage Analysis! | CVPD Research group The Computer Vision and Pattern Discovery (CVPD) group at the University of the Basque Country (UPV/EHU) is offering a fully funded 4-year PhD position within the recently awarded project TOSBI: Towar...

๐Ÿ“ฃ Weโ€™re hiring, please RT! Fully funded 4-year PhD position in our CVPD group at @informatikaehu.bsky.social!

Research at the intersection of AI, deep learning & bioimage analysis. ๐Ÿง ๐Ÿ”ฌ

๐Ÿ“… Applications open Oct 6 (deadline: ~Oct 27)
๐Ÿ“ San Sebastian, Spain.
๐Ÿ‘‰ cvpd.github.io/post/2025-09...

30.09.2025 11:01 โ€” ๐Ÿ‘ 32    ๐Ÿ” 28    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 4
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We (with @nicolasdray.bsky.social @zenlabpasteur.bsky.social) are happy to release officially FishFeats, our #napari plugin to streamline 3D smFish/RNA quantification! ๐ŸŽŠ
Available here: github.com/gletort/Fish... user documentation: gletort.github.io/FishFeats/

04.09.2025 16:07 โ€” ๐Ÿ‘ 46    ๐Ÿ” 21    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Flyer for the Open Bioimaging Practices Meetups.
1. September 24th at 4pm: Guest presentation by Charlotte Soneson & Silvia Barbiero
2. October 28th at 4pm: Guest presentation by Marvin Albert
3. November 26th at 4pm: Guest presentations by Giliane Rochat & Flurin Sturzenegger

Flyer for the Open Bioimaging Practices Meetups. 1. September 24th at 4pm: Guest presentation by Charlotte Soneson & Silvia Barbiero 2. October 28th at 4pm: Guest presentation by Marvin Albert 3. November 26th at 4pm: Guest presentations by Giliane Rochat & Flurin Sturzenegger

Are you working with OME-Zarrs in Switzerland?
We're running a series of community events in the context of the BioFAIR project of the BioVisionCenter: Monthly Open Bioimaging Practices Meetups with presentations by us & community members. Starting off with 3 cool events this fall (see image) (1/6)

16.09.2025 07:46 โ€” ๐Ÿ‘ 12    ๐Ÿ” 8    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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University Researcher in Bioimaging / Universitetsforskare med inriktning bioimaging, 1.11.2025-31.12.2030

Come and work with us 5-year position available for a University Researcher in Bioimaging 1.11.2025-31.12.2030

abo.rekrytointi.com/paikat/index...

10.09.2025 11:28 โ€” ๐Ÿ‘ 35    ๐Ÿ” 38    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1

I think even beyond the fact that itโ€™s easier to get work done in-person, for a lot of people (including me) itโ€™s much easier to interact with people online *after* having met them in person. Something to do with getting peopleโ€™s behavioral cues.

12.09.2025 14:45 โ€” ๐Ÿ‘ 4    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Post an image from your summer that confers peace

31.08.2025 19:18 โ€” ๐Ÿ‘ 5    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 1
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Automated optogenetic control of hundreds of cells in parallel. Each cell is individually steered, collectively acting as a "tissue printer". Preprint & code out! www.biorxiv.org/content/10.1...

21.08.2025 20:16 โ€” ๐Ÿ‘ 109    ๐Ÿ” 38    ๐Ÿ’ฌ 6    ๐Ÿ“Œ 2

โ€œNew paper out ๐ŸŽ‰ We built a system to automate optogenetic cell control across scales. For the demo, we made the cells spell my name โ€” because if you canโ€™t use science to feed your ego, whatโ€™s the point? ๐Ÿ˜Ž๐Ÿงซโœจโ€

22.08.2025 14:41 โ€” ๐Ÿ‘ 14    ๐Ÿ” 4    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Have fun! Wishing you the same success and longevity as you had with ZIDAS (9th edition last week!)

14.07.2025 15:03 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

A very good idea! Iโ€™m deeply skeptical current models can find โ€œnew physicsโ€ but this would be a good test. Surprised nobody has done this yet. Probably not in the interest of most model trainers to highlight their limits and dehype them. Clarification: I do think that LLMs can be very useful tools!

30.06.2025 18:19 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

You thought the publication business had reached the bottom with predatory journals, insane publication fees, data harvesting etc? No, it can dig deeper ๐ŸŽ‰! #justpreprint

10.06.2025 19:00 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Rachel Thomas, PhD - Deep learning gets the glory, deep fact checking gets ignored an AI researcher going back to school for immunology

"a fascinating case study on the limits of AI in biology and the harms of current publishing incentives" rachel.fast.ai/posts/2025-0...

04.06.2025 15:53 โ€” ๐Ÿ‘ 93    ๐Ÿ” 45    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 5

I second that!

16.05.2025 07:47 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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New release: napari-omero 0.5.0 ๐Ÿ˜€@openmicroscopy.org @napari.org thanks to some big contributions from @psobolewskiphd.bsky.social , @will-j-moore.bsky.social and of course @talley.codes. Some features in spotlight ๐Ÿ‘‡

First: napari-omero now supports lazy loading of image pyramids from OMERO๐Ÿ”บ:

12.05.2025 11:19 โ€” ๐Ÿ‘ 32    ๐Ÿ” 10    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 1
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GitHub - HarrisonKramer/optiland: Comprehensive optical design, optimization, and analysis in Python, including GPU-accelerated and differentiable ray tracing via PyTorch. Comprehensive optical design, optimization, and analysis in Python, including GPU-accelerated and differentiable ray tracing via PyTorch. - HarrisonKramer/optiland

To look into: a Python alternative to ZEMAX... github.com/HarrisonKram...

02.05.2025 22:56 โ€” ๐Ÿ‘ 34    ๐Ÿ” 11    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0