Ji Soo Lee

About Me

I am a master's student in the MLV (Machine Learning & Vision) Lab at Korea University, South Korea, advised by Prof. Hyunwoo J. Kim. I received my B.S. in Computer Science and Engineering from Korea University. My research interests lie in multi-modal understanding, especially in video understanding with foundation models.

News

• [2025 Aug] Our paper CaRe-DPO has been accepted to EMNLP 2025 as findings.
• [2025 Jun] Our paper BLiM has been accepted to ICCV 2025 as Highlight.
• [2025 Jan] Our paper VidChain has been accepted to AAAI 2025.
• [2023 Oct] Our paper Flipped-VQA has been accepted to EMNLP 2023.
• [2023 Jul] Our paper OVQA has been accepted to ICCV 2023.

Publications

Most recent publications on Google Scholar.
* indicates equal contribution.

Captioning for Text-Video Retrieval via DualGroup-Direct Preference Optimization

Ji Soo Lee, Byungoh Ko, Jaewon Cho, Howoong Lee, Jaewoon Byun, Hyunwoo J. Kim

EMNLP 2025 findings

Paper Code

Bidirectional Likelihood Estimation with Multi-Modal Large Language Models for Text-Video Retrieval

Dohwan Ko*, Ji Soo Lee*, Minhyuk Choi, Zihang Meng, Hyunwoo J. Kim

ICCV 2025 Highlight

Paper Code

VidChain: Chain-of-Tasks with Metric-based Direct Preference Optimization for Dense Video Captioning

Ji Soo Lee*, Jongha Kim*, Jeehye Na, Jinyoung Park, Hyunwoo J. Kim

AAAI 2025

Paper Code

Large Language Models are Temporal and Causal Reasoners for Video Question Answering

Dohwan Ko*, Ji Soo Lee*, Wooyoung Kang, Byungseok Roh, Hyunwoo J. Kim

EMNLP 2023

Paper Code

Open-vocabulary Video Question Answering: A New Benchmark for Evaluating the Generalizability of Video Question Answering Models

Dohwan Ko, Ji Soo Lee, Miso Choi, Jaewon Chu, Jihwan Park, Hyunwoo J. Kim

ICCV 2023

Paper Code

Vitæ

Full Resume in PDF.

• MLV Lab 2025 ~

  Ph.D. Student (Advisor: Hyunwoo J. Kim)
  Video Understanding with Foundation Models
• MLV Lab 2023 Sept - 2025 Sept

  M.S. Student (Advisor: Hyunwoo J. Kim)
  Video Understanding with Foundation Models
• Scholarship 2023 Sept

  Academic Excellence Freshman Scholarship
  
• Travel award 2023 Aug

  ICCV Travel Award
  
• Korea University 2019 March - 2023 Aug

  B.S. Student in Computer Science