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Jan van Gemert

@jvgemert.bsky.social
1.3K followers 248 following 258 posts

Head of the Computer Vision lab; TU Delft. - Fundamental, empirical, understanding-based, Deep Learning research - Visual inductive priors for data efficiency Web: jvgemert.github.io

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Jan van Gemert @jvgemert.bsky.social · 06/10/2026
Nice, thanks for sharing!
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Jan van Gemert @jvgemert.bsky.social · 06/10/2026
Heresy: If you can't beat them, do research on it 🙂 Would HP search for classic methods such as SVM (C, Lambda), L2-reg, k for kNN, behave differently when test tuned vs val tuned? If train/val/test are representatively sampled. Ie: not sure if it's deep learning specific.
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Jan van Gemert @jvgemert.bsky.social · 06/10/2026
In addition to the research findings, this is the type of research I really enjoyed doing 😊 "On Hyperparameter Tuning on the Test Set" arxiv.org/abs/2610.05902
arxiv.org
On Hyperparameter Tuning on the Test Set
"Don't tune hyperparameters on the test set" is often stated in machine learning textbooks. Violating it is considered a cardinal sin that produces misleadingly optimistic results, corrupts benchmark ...
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Jan van Gemert @jvgemert.bsky.social · 05/10/2026
Are incomprehensible papers easier to review? In my opinion, readability is a core element of a publication, so, if its not readable, it doesn't warrant close scrutiny, perhaps? And does this then reduce review workload? ()
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Jan van Gemert @jvgemert.bsky.social · 03/10/2026
I only know the basics about flow matching/diffusion, but this is really nice! Moore, Escher, Penrose: A Conformal Golden Braid arxiv.org/abs/2610.02210
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Jan van Gemert @jvgemert.bsky.social · 01/10/2026
Happy birthday old timer? 😅
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Jan van Gemert @jvgemert.bsky.social · 28/09/2026
Oohhoee! 🤩
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Jan van Gemert @jvgemert.bsky.social · 26/09/2026
Jealous 🤩
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Jan van Gemert @jvgemert.bsky.social · 25/09/2026
I love those visual abstracts!
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Jan van Gemert @jvgemert.bsky.social · 25/09/2026
Haha, old paradigm love? 😅
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Dan Goodman @neural-reckoning.org · 20/09/2026
I'm not sure I agree with @giorgio.gilest.ro's logic that this ends up with technofeudalism. Yes LLM-written papers are flooding journals, but that's because journals are and always were a bad tool for filtering for insight. Our response should be to try something different.
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Jan van Gemert @jvgemert.bsky.social · 19/09/2026
Scientific enshittification? Or is that term already used for something else? (highly likely, unfortunately)
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Jan van Gemert @jvgemert.bsky.social · 19/09/2026
Its 2x45=90 min. Where lectures (1,2) (2,3) are taught together. I focus on the essence. Ie: I had to cut my content in half, twice. Students only remembered 25%, so, they might as well remember the 25% that matters 🙂. I aim to teach slow and in-depth, vs shallow, fast, and broad.
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Jan van Gemert @jvgemert.bsky.social · 19/09/2026
Wow! This website is incredible! It's so vague, repetitive, unexplained, sometimes wrong, and even including marketing, that I hope my students can see through this, because critical thinking is a learning objective 😅 It actually means that the slides are timely, in a world filled with blur.
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Nicolas Audebert @nshaud.bsky.social · 03/08/2026
I'm burnt out of discussing "AI". I don't care for the press releases from big companies. I hate having to comment immediately. I dislike "hot takes". I'm worried we, as scientists, are losing touch with scientific values. We've become customers, salivating at ads marketed to investors. 1/15
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Jan van Gemert @jvgemert.bsky.social · 19/09/2026
Join our quest! See our Meta-science for Machine Learning initiative: metascienceforml.github.io
metascienceforml.github.io
Metascience for Machine Learning
A repository for collecting information about Metascience for machine learning.
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Reposted by Jan van Gemert
Dr. Martin Skrodzki @msmathcomp.bsky.social · 17/09/2026
Open Position for an Assistant/Associate Professor in Visual Analytics: careers.tudelft.nl/job/Delft-As.... Apply if you are excited about interactive exploration, analysis, and interpretation of complex data. Please also forward this position to anyone in your network who is interested.
careers.tudelft.nl
Assistant/Associate Professor in Visual Analytics
Assistant/Associate Professor in Visual Analytics
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Jan van Gemert @jvgemert.bsky.social · 18/09/2026
I never wanted to share my slides before the lecture because it ruins my Socratic teaching style 🍵 But.. I found out they are circling in the interwebs, so, I might as well share them myself then 🙂. Then at least they are up to date 😊. jvgemert.github.io/teach.html
jvgemert.github.io
teaching | Jan van Gemert
Academic website of Jan van Gemert, Computer Vision and Deep Learning research, TU Delft.
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Jan van Gemert @jvgemert.bsky.social · 16/09/2026
1: you are forced by your organization to use it.
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Jan van Gemert @jvgemert.bsky.social · 14/09/2026
Our fifth workshop on Meta-science for Machine Learning is on Sept 22. metascienceforml.github.io Registration info in the link.
metascienceforml.github.io
Metascience for Machine Learning
A repository for collecting information about Metascience for machine learning.
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Jan van Gemert @jvgemert.bsky.social · 12/09/2026
A Delfie at the European Conference on Computer Vision #ECCV2026 :)
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Jan van Gemert @jvgemert.bsky.social · 11/09/2026
Ok. Scholar-inbox seems a good solution to navigating the posters.
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Jan van Gemert @jvgemert.bsky.social · 11/09/2026
Posters are not findable anyway @eccv.bsky.social #ECCV2026 the app is unusable, and the website has no poster numbers at the papers. Moving poster boards around seems not a big issue if posters aren't findable anyway 😂
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Jan van Gemert @jvgemert.bsky.social · 10/09/2026
Haha an AI workaround for deficiencies in an AI conference 😂
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Jan van Gemert @jvgemert.bsky.social · 09/09/2026
@eccv.bsky.social #ECCV2026 How can I organize which posters to see where? The app cuts off paper titles (ie: unreadable and unusable). The website's schedule is great, but has no poster IDs next to the titles. Will we get a handy hardcopy program, with titles, times, and ids?
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Jan van Gemert @jvgemert.bsky.social · 06/09/2026
Anyone interested here for pooling together some money to increase @emilymbender.bsky.social 's fee? 😊 (I looked up the fee, and Im hoping this message is widely shared 😅)
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Jan van Gemert @jvgemert.bsky.social · 04/09/2026
This is why I work on data efficiency: to allow AI training for the long tail of SMEs and universities who don't have the huge resources. I don't believe AI will go away. Let's make training more accessible. It's aligning my research with my values.
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Evangelos Kazakos @ekazakos.bsky.social · 02/09/2026
Computer vision people, where are you??? 👀
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Victoria Bosch @initself.bsky.social · 28/08/2026
Are brains and artificial neural networks converging onto universal representations? There is a seductive idea making the rounds in NeuroAI / machine learning: train systems well enough, and they all converge on the same representation of reality (i.e. a unique world model). We have thoughts™ 1/n
cell.com
The Umwelt Representation Hypothesis: rethinking Universality
Recent studies reveal striking representational alignment between artificial neural networks (ANNs) and biological brains, leading to proposals that all sufficiently capable systems converge on univer...
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Jan van Gemert @jvgemert.bsky.social · 02/09/2026
#ECCV2026 Workshop on Empirical Theory: tracing back the causal relationships in our scientific papers. Untroubling the "troubling trends in machine learning scholarship" empiricaltheory.github.io @eccv.bsky.social
empiricaltheory.github.io
E.T. : Empirical Theory in Representation Learning
Phoning home to science
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Sardonicus @sardonicus.eu · 25/08/2026
Black cat drinking coffee 
More espresso less depresso.
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Jan van Gemert @jvgemert.bsky.social · 25/08/2026
Really nice work 🤩
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Jan van Gemert @jvgemert.bsky.social · 23/08/2026
Thank you for sharing. It takes courage to open up like you do.
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Jan van Gemert @jvgemert.bsky.social · 19/08/2026
I have my guidelines here; interesting to find out what you will do with all of them 🙂. jvgemert.github.io/links.html
jvgemert.github.io
guidelines | Jan van Gemert
My research guidelines for Fundamental empirical understanding-based deep learning research; and links to guidelines from others.
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Jan van Gemert @jvgemert.bsky.social · 19/08/2026
Transformers for Transformers!
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Jan van Gemert @jvgemert.bsky.social · 16/08/2026
I feel very much the same. This is one the reason why we started the Empirical Theory in Representation Learning workshop. Wouldn't it be great to have a venue full of interesting papers!? 🤩 empiricaltheory.github.io
empiricaltheory.github.io
E.T. : Empirical Theory in Representation Learning
Phoning home to science
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Jan van Gemert @jvgemert.bsky.social · 14/08/2026
This is one of our reasons for starting a new research style initiative: Empirical Theory: empiricaltheory.github.io
empiricaltheory.github.io
E.T. : Empirical Theory in Representation Learning
Phoning home to science
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Jan van Gemert @jvgemert.bsky.social · 12/08/2026
And how CNNs learn to break translation equivariance as the cheri on top ;)
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Jan van Gemert @jvgemert.bsky.social · 10/08/2026
Bring one to ECCV? 🤤
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ML for Science @ml4science.bsky.social · 06/08/2026
📢 We're hiring: Tenure-Track Professor for Philosophy of Machine Learning for Science @unituebingen.bsky.social! We're looking for an outstanding researcher with a strong profile in #philosophy and strong connections to #ML and #AI. Deadline: 30 Sept 2026; more info: uni-tuebingen.de/en/128980 1/3
This graphic displays the following text on a colored background: Open Position: Tenure-Track Professor of Philosophy of Machine Learning for Science. Application Deadline: September 30, 2026.
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Jan van Gemert @jvgemert.bsky.social · 31/07/2026
Partly a reason why I just try to scan *all* arXiv entries in CV 😁. Its also a source of research papers outside of other bubbles which I might be in 🙂.
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Jan van Gemert @jvgemert.bsky.social · 31/07/2026
@vele.bsky.social @cscv-bot.bsky.social I love your arXiv bot ♥️. But.. reading it is difficult due to the author names coming first, so the most important thing is difficult to find: the paper title 🙂. If it was up to me, I would remove the author list completely 😁.
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Jan van Gemert @jvgemert.bsky.social · 24/07/2026
NeurIPS reviewers not liking understanding-based ML work? Consider submitting to our workshop: empiricaltheory.github.io - R1: Reject. Not state of the art. - R2: Reject. Just small toy datasets. - R3: Reject. After reading the paper it's trivial.
Empirical Theory in Representation Learning
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Jan van Gemert @jvgemert.bsky.social · 15/07/2026
Great respectful science-based discussion. This is why I am on BlueSky 💙.
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Jan van Gemert @jvgemert.bsky.social · 15/07/2026
This on-point quote could have been taken straight from academia. Probably holds for any large enough organisation (?). Be the change you want to see.
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David Picard @davidpicard.eurosky.social · 07/07/2026
The E.T.👽 workshop submission is finally open! We aim at promoting scientific theory building in deep representation learning 2 tracks: 1p storyline & regular 14p full paper Deadline: Aug 1st 🖥️ empiricaltheory.github.io 📜 openreview.net/group?id=the... Let's do science! @eccv.bsky.social #ECCV
empiricaltheory.github.io
E.T. : Empirical Theory in Representation Learning
Phoning home to science
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Jan van Gemert @jvgemert.bsky.social · 13/07/2026
Understand-based research vs BOLD numbers. Submit your work to our ECCV workshop on Empirical Theory: empiricaltheory.github.io @davidpicard.eurosky.social @a-lucic.bsky.social m.loog, h.hung, h.pinson.
empiricaltheory.github.io
E.T. : Empirical Theory in Representation Learning
Phoning home to science
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Jan van Gemert @jvgemert.bsky.social · 10/07/2026
Is @thomasbrox.bsky.social profile pic promoting the realism of flying chairs? 😉
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Jan van Gemert @jvgemert.bsky.social · 05/07/2026
For me it's the exact opposite 😊. It's my hypothesis that all text editors are equally horrible in very different ways 🙂. We are entering a religious realm though... 😅
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European Conference on Computer Vision #ECCV2026 @eccv.bsky.social · 05/07/2026
The #ECCV2026 workshop page with links is now up! eccv.ecva.net/Conferences/...
eccv.ecva.net
2026 Workshops
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