Understanding how actions transform the physical world.

About

I am an undergraduate in Electrical Engineering at KAIST. I conduct research with Prof. Seungryong Kim at KAIST CVLab and Prof. Ziwei Liu at NTU S-Lab (MMLab). I am also a research intern at MAUM AI.

My work connects human video and robot experience to understand physical interactions and how actions change the world.

Research

How can AI understand the physical consequences of actions in real-world environments?

I study egocentric and embodied AI, with three connected interests:

  • Tool-use reasoning: understanding tool choice, interactions, and evolving object states from first-person video.
  • Latent actions & world models: learning action representations from human and robot experience to model what happens next.
  • 3D/4D scene understanding: building geometry-aware representations for reconstruction and embodied interaction.

Recent news

Oct 2026
Presented EgoTools at EMNLP 2026 in Budapest, Hungary.
Junsu Kim at the EgoTools poster, EMNLP 2026 in Budapest Junsu Kim presenting the EgoTools poster at EMNLP 2026
Aug 2026
EgoTools was accepted to EMNLP 2026 (Main)! 🎉
Feb 2026
C3G was accepted to CVPR 2026.
Jan–May 2026
Conducted research at NTU S-Lab (MMLab) under Prof. Ziwei Liu during an exchange semester in Singapore.

Publications

EgoTools dataset overview across real-world tool-use domains
Shulin Tian*, Junsu Kim*, Shuai Liu*, Hao Li*, ..., Ziwei Liu. View allView less
EMNLP 2026 (Main)

EgoTools brings together ~100 hours of egocentric tool-use video and a 1,000-question benchmark to study how models reason about tools, procedures, and physical effects.

C3G overview of compact Gaussian scene reconstruction and understanding
Honggyu An*, Jaewoo Jung*, ..., Junsu Kim, ..., Seungryong Kim. View allView less
CVPR 2026

C3G learns compact scene representations with just 2K Gaussians, supporting feed-forward 3D reconstruction, novel-view synthesis, and scene understanding.

* Equal contribution.

Research experience

MAUM AI, WoRV Division, Future Intelligence Lab
Aug 2026 – Present

Research Intern

  • Lead task design for a long-horizon human–robot collaboration benchmark, developing simulated cooking scenarios, physical success checks, and partial-information variants; built an early state-engine prototype and found that symbolic task constraints masked visual activity-recognition errors.
S-Lab (MMLab), NTU
Jan 2026 – Present

Research Intern · Advisor: Prof. Ziwei Liu

  • Co-led EgoTools, a dataset and benchmark for tool-centric reasoning: collected ~100 hours of egocentric tool-use video and designed a 1K-QA benchmark across four reasoning tracks, with annotation and quality-control workflows.
  • Ran input ablations validating the benchmark’s reliance on visual and temporal evidence; contributed to the Qwen3-VL-8B fine-tuning study (EgoTools-Bench 50.0% → 60.9%) and its cross-benchmark generalization analysis.
Computer Vision Lab (CVLab), KAIST AI
Jun 2025 – Present

Research Intern · Advisor: Prof. Seungryong Kim

  • Jun 2026 – Oct 2026: For DreamX, ran the latent-action baseline comparison on LARYBench under a shared protocol, and co-ran human-to-robot action-transfer experiments on a bimanual robot, recording human demonstrations and paired teleoperated reference trajectories.
  • Jun 2025 – Nov 2025: Contributed to C3G, analyzing DINOv2-based attention maps to study how compact Gaussian queries aggregate multi-view information.
Video and Image Computing Lab (VICLab), KAIST
Dec 2024 – Jun 2025

Research Intern · Advisor: Prof. Mun Churl Kim

  • Implemented and evaluated object-detection pipelines spanning two-stage, YOLO-style, and Vision Transformer architectures for few-shot and anomaly detection tasks.

Education

Korea Advanced Institute of Science and Technology (KAIST)
Daejeon, South Korea
  • B.S. in Electrical Engineering
  • Mar 2021 – Expected Aug 2027
  • GPA: 4.09/4.30 · Major GPA: 4.19/4.30
Nanyang Technological University (NTU)
Singapore
  • Exchange Student, School of Electrical and Electronic Engineering
  • Jan 2026 – May 2026

Honors & scholarships

  • KAIST Presidential Fellowship (15th) 2025 – Present
  • National Science & Engineering Scholarship for Academic Excellence 2025 – Present
  • KAIST EE Dean’s List Award Spring 2024 Awarded to the top 3% of EE students
  • KAIST Freshman Dean’s List Award Fall 2021 Awarded to the top 3% of first-year students
  • Woon Hae Scholarship (12th) 2025
  • KAIST Shared Lives Award · Top-ranked Recipient 2026

Beyond research

Leadership: President of EERun, Google Student Ambassador, member of the Young Engineers Honor Society.

Programming: Python, C/C++, PyTorch, Git, LaTeX.

Research toolkit: video preprocessing, dataset curation, annotation pipelines, model evaluation, and 3D/vision experimentation.