Junchen Liu 刘俊辰

I'm a PhD student at University of Toronto, advised by Prof. Sanja Fidler. Before that, I was a research intern of BAIR in UC Berkeley advised by Prof. Angjoo Kanazawa. Previously, I've been interned at Institute for AI Industry Research (AIR), Tsinghua University supervised by Prof. Hao Zhao.

Email  /  Scholar  /  Twitter  /  Github

profile photo

Publications

(* indicates joint first authorship)

clean-usnob Cameras as Relative Positional Encoding
Ruilong Li*, Brent Yi*, Junchen Liu*, Hang Gao, Yi Ma, Angjoo Kanazawa,
arXiv 2025
project page / arXiv / code

Relative positional encoding for both camera intrinsic and extrinsic conditioning.
clean-usnob Rip-NeRF: Anti-aliasing Radiance Fields with Ripmap-Encoded Platonic Solids
Junchen Liu*, Wenbo Hu*, Zhuo Yang*, Jianteng Chen, Guoliang Wang, Xiaoxue Chen, Yantong Cai, Huan-ang Gao, Hao Zhao
SIGGRAPH 2024
project page / arXiv / video / code

Efficiently anti-alias NeRF using anisotropic pre-filtering low rank structure, which achieves higher PSNR within less training time compared with Zip-NeRF in the bounded scenes.
clean-usnob NeRRF: 3D Reconstruction and View Synthesis for Transparent and Specular Objects with Neural Refractive-Reflective Fields
Xiaoxue Chen*, Junchen Liu*, Hao Zhao, Guyue Zhou, Yaqin Zhang
arXiv 2023
arXiv / code

Reconstruct transparent and specular objects using a uniform neural representation.

Services

  • TPAMI, TVCG, ACM MM Reviewer

Selected Awards

  • Grand Prize of Study Scholarship, 2022 (Top 2%)
  • National Scholarship, Ministry of Education of China, 2022 (Top 0.2% nationwide)
  • First Prize, The Chinese Mathematics Competitions, Beijing, 2022
  • National First Prize, Contemporary Undergraduate Mathematical Contest in Modeling, 2022 (Top 0.65% nationwide)
  • First Prize, The Chinese Mathematics Competitions, Beijing, 2021

Misc


I'm a huge fan of Japanese manga, and my favorite manga artists are Hideaki Anno, Tatsuki Fujimoto and Akira Toriyama! I've read the entire series of Evangelion, Dragon Ball, Attack on Titan, Fullmetal Alchemist, One Piece, Naruto, Chainsaw Man, Bleach, Fairy Tail, Fire Punch, Detective Conan, Kuroko's Basketball, Jujutsu Kaisen, Demon Slayer, and Magi. I'm also a ten-year veteran of Clash Royale and have once ranked in the top 1000 on the China server.

Thanks to Jon Barron for sharing the code of his personal webpage.