Weiwei Sun

@wsunid

Working on 3D for Amazon Just Walk Out (JWO). Applied Scientist @Amazon, Ph.D.@UBC, intern @Amazon, Intern @NvidiaAI, Intern @Google. Opinions are my own.

Vancouver, British Columbia

wsunid.github.io

Joined March 2020

321 Following

238 Followers

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Weiwei Sun
@wsunid
Jun 9
Hey, folks who just finished CVPR, 3D is not dead yet at least in Amazon JWO (Autonomous store) where we still care 3D reconstruction and camera stuff. Please drop me an Email if you are looking for a FTE since we are looking for a scientist for 3D (SfM, GFM) now!
2
Weiwei Sun
@wsunid
Mar 16
Time of getting a work permit in Canada is ~259days (>8mons). I feel sorry for PhD students who need a work visa for summer internship. I don’t think tech companies can wait for 8mons. BTW, JWO is recruiting interns (US or Canada?) in 3D/VLM/VDM. Shot me your CV.
Weiwei Sun
@wsunid
Mar 5
TTT seems increasingly popular!
Haian Jin
@Haian_Jin
Mar 5
Spatial reconstruction is a long-context problem: real scenes come with hundreds of images. But O(N²) transformer-based models don’t scale efficiently. Introducing: 🤐ZipMap (CVPR ’26): Linear-Time, Stateful 3D Reconstruction via Test-Time Training (TTT). ZipMap “zips” a large
Weiwei Sun
@wsunid
Nov 26, 2025
Hi, I will be at @NeurIPS25_San_Diego Please reach out and always happy to chat about 3D vision, simulation, generative modelling etc and their challenges in real-world applications!
Weiwei Sun
@wsunid
Nov 15, 2025
Yep!
Kosta Derpanis
@CSProfKGD
Nov 15, 2025
How does @kwangmoo_yi only have 3.8k followers?!?! Folks, Kwang keeps surfacing absolute gems. Drop him a follow.
Quote
Kwang Moo Yi
@kwangmoo_yi
Nov 13, 2025
Singer and Rotstein et al., "Time-to-Move: Training-Free Motion Controlled Video Generation via Dual-Clock Denoising" Make a rough warp, push it through Image-to-Video model with denoise together up until a timestep, then let it finish the rest without interference.

Weiwei Sun

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