Linus Härenstam-Nielsen
linushn.bsky.social
Linus Härenstam-Nielsen
@linushn.bsky.social
PhD student at TU Munich

Working on 3D reconstruction, optimization theory and such things

website: linusnie.github.io/
github: github.com/Linusnie
scholar: scholar.google.com/citations?user=HWAA
Pinned
DiffCD: A Symmetric Differentiable Chamfer Distance for Neural Implicit Surface Fitting, presented at #ECCV2024

Paper: arxiv.org/abs/2407.17058
Code/project: github.com/linusnie/dif...
Reposted by Linus Härenstam-Nielsen
📽️ Check out Visual Odometry Transformer! VoT is an end-to-end model for getting accurate metric camera poses from monocular videos.

vladimiryugay.github.io/vot/
October 7, 2025 at 9:02 AM
Reposted by Linus Härenstam-Nielsen
#TTT3R: 3D Reconstruction as Test-Time Training
TTT3R offers a simple state update rule to enhance length generalization for #CUT3R — No fine-tuning required!
🔗Page: rover-xingyu.github.io/TTT3R
We rebuilt @taylorswift13’s "22" live at the 2013 Billboard Music Awards - in 3D!
October 1, 2025 at 6:35 AM
Reposted by Linus Härenstam-Nielsen
July 9, 2025 at 1:18 PM
The code for our #CVPR2025 paper, PRaDA: Projective Radial Distortion Averaging, is now out!

Turns out distortion calibration from multiview 2D correspondences can be fully decoupled from 3D reconstruction, greatly simplifying the problem

arxiv.org/abs/2504.16499
github.com/DaniilSinits...
July 9, 2025 at 1:54 PM
Reposted by Linus Härenstam-Nielsen
Can we match vision and language representations without any supervision or paired data?

Surprisingly, yes! 

Our #CVPR2025 paper with @neekans.bsky.social and @dcremers.bsky.social shows that the pairwise distances in both modalities are often enough to find correspondences.

⬇️ 1/4
June 3, 2025 at 9:27 AM
Reposted by Linus Härenstam-Nielsen
Can you train a model for pose estimation directly on casual videos without supervision?

Turns out you can!

In our #CVPR2025 paper AnyCam, we directly train on YouTube videos and achieve SOTA results by using an uncertainty-based flow loss and monocular priors!

⬇️
May 13, 2025 at 8:11 AM
Reposted by Linus Härenstam-Nielsen
Our paper, ”Semantic Library Adaptation: LoRA Retrieval and Fusion for Open-Vocabulary Semantic Segmentation”, has been accepted to #CVPR 2025.

📄 Paper: arxiv.org/abs/2503.21780
🧪 Code: github.com/rezaqorbani/...
Semantic Library Adaptation: LoRA Retrieval and Fusion for Open-Vocabulary Semantic Segmentation
Open-vocabulary semantic segmentation models associate vision and text to label pixels from an undefined set of classes using textual queries, providing versatile performance on novel datasets. Howeve...
arxiv.org
April 3, 2025 at 8:50 PM
Reposted by Linus Härenstam-Nielsen
Very glad to announce that our "Finsler Multi-Dimensional Scaling" paper, accepted at #CVPR2025, is now on Arxiv! arxiv.org/abs/2503.18010
We are thrilled to have 12 papers accepted to #CVPR2025. Thanks to all our students and collaborators for this great achievement!
For more details check out cvg.cit.tum.de
March 25, 2025 at 7:30 AM
Reposted by Linus Härenstam-Nielsen
AnyCalib: On-Manifold Learning for Model-Agnostic Single-View Camera Calibration

Javier Tirado-Garín, @jcivera.bsky.social

tl;dr: image->ViT+DPT->Field of View (FoV) fields->bijective rays and corresponding image coordinates->closed-form model-agnostic intrinsics

arxiv.org/abs/2503.12701
March 18, 2025 at 4:45 PM
Reposted by Linus Härenstam-Nielsen
We are thrilled to have 12 papers accepted to #CVPR2025. Thanks to all our students and collaborators for this great achievement!
For more details check out cvg.cit.tum.de
March 13, 2025 at 1:11 PM
Reposted by Linus Härenstam-Nielsen
MUSt3R: Multi-view Network for Stereo 3D Reconstruction

Yohann Cabon, Lucas Stoffl, Leonid Antsfeld, Gabriela Csurka, Boris Chidlovskii, Jerome Revaud, @vincentleroy.bsky.social

tl;dr: make DUSt3R symmetric and iterative+multi-layer memory mechanism->multi-view DUSt3R

arxiv.org/abs/2503.01661
March 4, 2025 at 8:26 AM
Reposted by Linus Härenstam-Nielsen
🥳 Thrilled to announce that our work, "4Deform: Neural Surface Deformation for Robust Shape Interpolation," has been accepted to #CVPR2025 🙌
💻 Check our project page: 4deform.github.io
👏 Great thanks to my amazing co-authors. @ricmarin.bsky.social @dongliangcao.bsky.social @dcremers.bsky.social
March 3, 2025 at 6:18 PM
Reposted by Linus Härenstam-Nielsen
🥳Thrilled to share our work, "Implicit Neural Surface Deformation with Explicit Velocity Fields", accepted at #ICLR2025 👏
code is available at: github.com/Sangluisme/I...
😊Huge thanks to my amazing co-authors. @dongliangcao.bsky.social @dcremers.bsky.social
👏Special thanks to @ricmarin.bsky.social
January 23, 2025 at 5:22 PM
Reposted by Linus Härenstam-Nielsen
Indeed - everyone had a blast - thank you all for the great talks, discussions and Ski/snowboarding!
This week we had our winter retreat jointly with Daniel Cremer's group in Montafon, Austria. 46 talks, 100 Km of slopes and night sledding with some occasionally lost and found. It has been fun!
January 16, 2025 at 5:56 PM
DiffCD: A Symmetric Differentiable Chamfer Distance for Neural Implicit Surface Fitting, presented at #ECCV2024

Paper: arxiv.org/abs/2407.17058
Code/project: github.com/linusnie/dif...
January 8, 2025 at 12:30 PM
Reposting some of my prior works here on this site :) "Semidefinite Relaxations for Robust Multiview Triangulation" at #CVPR2023!

paper: arxiv.org/abs/2301.11431
code: github.com/Linusnie/rob...
January 8, 2025 at 12:29 PM