Show the Signal, Hide the Noise: Spectral Forcing for Pixel-Space Diffusion
arXiv 2026
Pixel space, with nowhere for the noise to hide.
About
I am a Second-year PhD student at MMLab@NTU, Nanyang Technological University, under the supervision of Prof. Ziwei Liu. I earned my Bachelor’s degree from the University of Electronic Science and Technology of China (UESTC) and my Master’s degree from the National University of Singapore (NUS). My research centers on video generation, diffusion models, and robotics.
Bachelor’s — UESTCMaster’s — NUSPhD — NTU (in progress)
weichen002 [at] e.ntu.edu.sg GitHub Google Scholar
What Kind of PhD Are You? Ten questions. Four attributes. Twenty-four answers.
Work
Ordered newest first. Every title below resolves to a source.
Refereed peer-reviewed venue Dashed preprint or technical report
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Teaser figure for Spectral Forcing. SenseNova-U1: Unifying Multimodal Understanding and Generation with NEO-unify Architecture
Tech report 2026
Teaser figure for SenseNova-U1. Understanding and generation under one architecture, which is the hard version.
Rhetoric objects
RhetoricTechnical report. Core contributor credit, not first author.
The Prism Hypothesis: Harmonizing Semantic and Pixel Representations via Unified Autoencoding
ECCV 2026
Teaser figure for The Prism Hypothesis. Semantics and pixels held in one autoencoder, stated as a hypothesis rather than a trick.
CFG-Zero*: Classifier-Free Guidance with Zero Prediction
arXiv 2025
Teaser figure for CFG-Zero*. Guidance reconsidered at the zeroth step. The asterisk is load-bearing.
Vchitect-2.0: Parallel Transformer for Scaling Up Video Diffusion Models
arXiv 2025
Teaser figure for Vchitect-2.0. Project Page arXiv Dataset Code
A parallel transformer, scaled up, and the dataset shipped with it.
Rhetoric objects
RhetoricPreprint. Nineteen authors; co-first among them.
RepVideo: Rethinking Cross-Layer Representation for Video Generation
arXiv 2025
Teaser figure for RepVideo. What happens between the layers turned out to be the thing worth rethinking.
Lumina-t2x: Transforming text into any modality, resolution, and duration via flow-based large diffusion transformers
Tech report 2024
Teaser figure for Lumina-T2X. Any modality, any resolution, any duration — an ambitious sentence to defend.
Rhetoric objects
RhetoricTechnical report, not peer reviewed. Contributor credit.
Link-Context Learning For Multimodal LLMs
CVPR 2024
Teaser figure for Link-Context Learning. The model is given the link between examples, not only the examples.
Sphinx: The joint mixing of weights, tasks, and visual embeddings for multi-modal large language models
Tech report 2023
Teaser figure for Sphinx. Weights, tasks and visual embeddings, mixed jointly rather than stacked.
Rhetoric objects
RhetoricTechnical report, not peer reviewed. Contributor credit.
Hierarchy Flow For High-Fidelity Image-to-Image Translation
arXiv 2022
Teaser figure for Hierarchy Flow. Translation that keeps its fidelity by keeping its hierarchy.
SAVAnet: Surgical Action-Driven Visual Attention Network for Autonomous Endoscope Control
IEEE T-ASE 2022
Teaser figure for SAVAnet. An endoscope that looks where the surgery is going. The robotics start here.
* denotes equal contribution.
Record
Nanyang Technological University
May 2024 — Nov 2024Research Manager
Singapore
HyperGAI
Oct 2023 — May 2024Research Scientist
Singapore
SenseTime
Jun 2022 — Oct 2023Computer Vision Researcher
ShangHai
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SenseTime
May 2021 — Jun 2022Research Intern
Singapore
Games
The other ledger. It is longer than the first one and it was more fun to write.
3,288.1 hours across 8 titles. 343 of 917 achievements, counted across 7 of the 8.
Tom Clancy’s Rainbow Six Siege
All 48
1,558.4 hours48 of 48 achievements
Fifteen hundred hours of listening for a footstep through a ceiling. You do not hear the room any more. You hear what is about to come through it.
Rhetoric objects
RhetoricSixty-five days. Not of playing across the years — sixty-five entire days, end to end, in one room.
Age of Empires IV: Anniversary Edition
489.5 hours76 of 175 achievements
Dark, Feudal, Castle, Imperial. Four ages and a thousand years, compressed into something you can lose an evening to, and you keep going back to lose another one.
Dead by Daylight
437.5 hours130 of 303 achievements
Something is walking toward you and the sound is getting louder. You have heard it four hundred hours’ worth of times. It still works.
Disco Elysium: The Final Cut
The source
274.0 hours
Two hundred and seventy-four hours in a city you could not fix, losing an argument to yourself in twenty-four voices. You are reading one of them now. This entire room is borrowed from that game, and you knew that before you got here.
Total War: THREE KINGDOMS
250.4 hours37 of 99 achievements
You knew how this one ended before you installed it. Everyone does. Two hundred and fifty hours spent checking whether it would end differently for you.
Mount & Blade II: Bannerlord
103.4 hours8 of 50 achievements
Eight achievements out of fifty. You were not collecting anything. You were on a horse, going somewhere, and you did not stop to be measured.
Rhetoric objects
RhetoricYou did not finish going somewhere. You stopped, and then a PhD happened to you.
Baldur’s Gate 3
91.0 hours29 of 54 achievements
Ninety-one hours, and better than half the achievements. Not a fast reader. A thorough one — you stopped and talked to everybody.
Crusader Kings III
83.9 hours15 of 188 achievements
Fifteen of a hundred and eighty-eight. This game keeps score of things nobody sets out to do. The dynasty was the point; the ledger was never going to be filled.
Music
Three records. They will play right here, and they do not load until you ask them to.
Pure
1990
The Lightning SeedsCloudcuckooland
Nineteen ninety, and it still sounds like the first warm afternoon of a year. Nothing in it is trying to hurt you. Do you know how rare that is.
Nightingale
1997
YanniTribute
Not one word in the whole of it, and it still gets the entire story out. Somewhere in there an instrument is pretending to be a bird, and you are letting it.
About You
2022
The 1975Being Funny In A Foreign Language
It wants to be enormous and it is not embarrassed about wanting that. The temperature in the room drops a degree. Play it loud or do not play it.
Contact
- weichen002 [at] e.ntu.edu.sg
- GitHub
- github.com/WeichenFan
- Scholar
- Google Scholar