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Guillaume Astruc

@gastruc.bsky.social
374 followers 79 following 24 posts

2nd Year PhD Student from Imagine-ENPC/IGN/CNES Working on Self-supervised Cross-modal Geospatial Learning. Personal WebPage: gastruc.github.io

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Guillaume Astruc @gastruc.bsky.social · 23/06/2026
🛰️ Introducing UniverSat: one transformer backbone for Earth Observation that handles ANY sensor, ANY spatial, spectral & temporal resolution, ANY scale — with a single set of weights. 🌍
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Antoine Guédon @antoine-guedon.bsky.social · 16/06/2026
What if you could turn any number of photos (3, 8, 15, or even 60) into one clean 3D surface (pts & mesh) with Flow Matching? Check out our new work, Surflo: Consistent 3D Surface Flow Model with Global State. 🧵 1/N 🔗https://anttwo.github.io/surflo/
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Guillaume Astruc @gastruc.bsky.social · 16/04/2026
Excited to share my work as a Student Researcher at Google Zurich: UniGeoCLIP! 🌍🚀 W/ Eduard Trulls, Jan Hosang, @loicland.bsky.social & @pesarlin.bsky.social , we built a framework aligning 5 geospatial modalities in one space. Presented at EarthVision @ #CVPR2026. 🧵👇
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David Picard @davidpicard.eurosky.social · 08/04/2026
🚨 arxiv.org/abs/2604.06129 PoM: A Linear-Time Replacement for Attention with the Polynomial Mixer This paper is the result of doing a lab-wide hackathon on an idea I've had for some time. Probably the paper with the highest number of authors I've ever done. It's a CVPR Findings 26. Thread 🧵👇
arxiv.org
PoM: A Linear-Time Replacement for Attention with the Polynomial Mixer
This paper introduces the Polynomial Mixer (PoM), a novel token mixing mechanism with linear complexity that serves as a drop-in replacement for self-attention. PoM aggregates input tokens into a comp...
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Nicolas Dufour @nicolasdufour.bsky.social · 31/10/2025
We introduce MIRO: a new paradigm for T2I model alignment integrating reward conditioning into pretraining, eliminating the need for separate fine-tuning/RL stages. This single-stage approach offers unprecedented efficiency and control. - 19x faster convergence ⚡ - 370x less FLOPS than FLUX-dev 📉
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Guillaume Astruc @gastruc.bsky.social · 18/08/2025
Super interesting to see pure SSL outperforms text alignement on a super competitive but text-aligned suited task 🤯
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Guillaume Astruc @gastruc.bsky.social · 11/06/2025
🛰️ At #CVPR2025 presenting "AnySat: An Earth Observation Model for Any Resolutions, Scales, and Modalities" - Saturday afternoon, Poster 355! If you're here and want to discuss geolocation or geospatial foundation models, let's connect!
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Nicolas Gonthier @nicaogr.bsky.social · 11/06/2025
📢 FLAIR-HUB dataset A new large-scale, multimodal dataset for land cover and crop type mapping 🤗 Dataset: huggingface.co/datasets/IGN... 📄 Preprint: arxiv.org/abs/2506.07080 🤗 Pretrained models: huggingface.co/collections/... 💻 Code: github.com/IGNF/FLAIR-HUB 🌐 Project : arxiv.org/abs/2506.07080
arxiv.org
FLAIR-HUB: Large-scale Multimodal Dataset for Land Cover and Crop Mapping
The growing availability of high-quality Earth Observation (EO) data enables accurate global land cover and crop type monitoring. However, the volume and heterogeneity of these datasets pose major pro...
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Elliot Vincent @elliotvincent.github.io · 11/06/2025
I will be presenting our work on the detection of archaeological looting with satellite image time series at CVPR 2025 EarthVision workshop tomorrow! Honored and grateful that this paper received the best student paper award!
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Ryan @ryanboustany.bsky.social · 23/05/2025
📢 New preprint! “When majority rules, minority loses: bias amplification of gradient descent” We often blame biased data but training also amplifies biases. Our paper explores how ML algorithms favor stereotypes at the expense of minority groups. ➡️ arxiv.org/abs/2505.13122 (1/3)
arxiv.org
When majority rules, minority loses: bias amplification of gradient descent
Despite growing empirical evidence of bias amplification in machine learning, its theoretical foundations remain poorly understood. We develop a formal framework for majority-minority learning tasks, ...
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Guillaume Astruc @gastruc.bsky.social · 30/04/2025
We've added new experiments demonstrating robust generalization capabilities! Notably, AnySat shows strong performance on HLS Burn Scars - a sensor never seen during pretraining! 🔥🛰️ Check it out: 📄 Paper: arxiv.org/abs/2412.14123 🌐 Project: gastruc.github.io/anysat
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Imagine-ENPC @imagineenpc.bsky.social · 30/04/2025
Looking forward to #CVPR2025! We will present the following papers:
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Nicolas Gonthier @nicaogr.bsky.social · 28/04/2025
Introducing HySCDG #CVPR2025, a generative pipeline for creating a large hybrid semantic change detection for Earth Observation using Stable Diffusion and ControlNet ! 🗺️🛩️ 📄 Paper: arxiv.org/abs/2503.15683
arxiv.org
The Change You Want To Detect: Semantic Change Detection In Earth Observation With Hybrid Data Generation
Bi-temporal change detection at scale based on Very High Resolution (VHR) images is crucial for Earth monitoring. This remains poorly addressed so far: methods either require large volumes of annotate...
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Antoine Guédon @antoine-guedon.bsky.social · 03/04/2025
💻We've released the code for our #CVPR2025 paper MAtCha! 🍵MAtCha reconstructs sharp, accurate and scalable meshes of both foreground AND background from just a few unposed images (eg 3 to 10 images)... ...While also working with dense-view datasets (hundreds of images)!
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David Picard @davidpicard.eurosky.social · 21/03/2025
🔥🔥🔥 CV Folks, I have some news! We're organizing a 1-day meeting in center Paris on June 6th before CVPR called CVPR@Paris (similar as NeurIPS@Paris) 🥐🍾🥖🍷 Registration is open (it's free) with priority given to authors of accepted papers: cvprinparis.github.io/CVPR2025InPa... Big 🧵👇 with details!
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Imagine-ENPC @imagineenpc.bsky.social · 14/03/2025
Starter pack including some of the lab members: go.bsky.app/QK8j87w
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Thibaut Loiseau @thibautloiseau.bsky.social · 28/02/2025
🧩 Excited to share our paper "RUBIK: A Structured Benchmark for Image Matching across Geometric Challenges" (arxiv.org/abs/2502.19955) accepted to #CVPR2025! We created a benchmark that systematically evaluates image matching methods across well-defined geometric difficulty levels. 🔍
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Nicolas Dufour @nicolasdufour.bsky.social · 20/02/2025
Weights for CAD are finally available. It's one of the smallest diffusion models on the market, achieving performance close to SD and Pixart, featuring a Perceiver-like architecture. We leverage our coherence aware training to improve the textual understanding
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Guillaume Astruc @gastruc.bsky.social · 19/12/2024
🤔 What if embedding multimodal EO data was as easy as using a ResNet on images? Introducing AnySat: one model for any resolution (0.2m–250m), scale (0.3–2600 hectares), and modalities (choose from 11 sensors & time series)! Try it with just a few lines of code:
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arxiv cs.CV @arxiv-cs-cv.bsky.social · 19/12/2024
Guillaume Astruc, Nicolas Gonthier, Clement Mallet, Loic Landrieu AnySat: An Earth Observation Model for Any Resolutions, Scales, and Modalities arxiv.org/abs/2412.14123
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Antoine Guédon @antoine-guedon.bsky.social · 11/12/2024
⚠️Reconstructing sharp 3D meshes from a few unposed images is a hard and ambiguous problem. ☑️With MAtCha, we leverage a pretrained depth model to recover sharp meshes from sparse views including both foreground and background, within mins!🧵 🌐Webpage: anttwo.github.io/matcha/
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Nicolas Dufour @nicolasdufour.bsky.social · 10/12/2024
🌍 Guessing where an image was taken is a hard, and often ambiguous problem. Introducing diffusion-based geolocation—we predict global locations by refining random guesses into trajectories across the Earth's surface! 🗺️ Paper, code, and demo: nicolas-dufour.github.io/plonk
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