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Yongjun Choi

M.S. Student at UNIST
3D Vision & Robotics Lab

Visual Editing Scene Understanding Audio-Visual Learning

Hello! I am a master's student in the 3D Vision & Robotics Lab at UNIST, advised by Prof. Kyungdon Joo.

I was a visiting student in the CARTE, MIE, at the University of Toronto through the AI Convergence Program, supported by the IITP, Korean Government.

My research has focused on 3D scene understanding, image manipulation using generative model, video understanding, and visual–language modeling. Currently, I'm expanding my research scope to encompass audio-visual modeling, where I am actively developing and evaluating multimodal learning frameworks.

Contact: ccyjun123@unist.ac.kr

CV(Eng.) CV(Kor.) LinkedIn GitHub

Publications

Diffusion-based Hair Removal
AnyBald: Toward Realistic Diffusion-Based Hair Removal In-the-Wild

Click to view more details on the project page.

Yongjun Choi*, Seungoh Han*, Soomin Kim, Sumin Son, Mohsen Rohani, Edgar Maucourant, Dongbo Min, Kyungdon Joo
ACCEPTED WACV 2026 *Equal contribution
  • Developed AnyBald, a mask-free diffusion-based framework for realistic hair removal in the wild.
  • Achieves natural bald manipulation while preserving facial identity, enabling robust performance across diverse real-world scenarios.
practical video anomaly detection system in mobile devices
RAC-VAD: Reference-Guided Temporal Alignment and Pairwise Comparison for Video Anomaly Detection in Display Inspection
Yongjun Choi, Gyeongsu Cho, Jinhyeok Kim, Changsu Ha, Sanggyu Biern, Kyungdon Joo
UNDER REVIEW
  • Video-based anomaly detection system for industrial display device inspection, capable of identifying defects during long-term multi-device operation.
  • Introduce two-stage based video alignment and comparison approach for robust, noise-resistant anomaly detection.
Gomoku AI
Demonstrating a Vision-Based AI Robot for Strategic Board Games

Click to view more details on the project page.

Taehwan Kim*, Dokeun Lee*, Seonghyeon Kim*, Yongjun Choi*, Sungjun Heo, Thi Thuy Ngan Duong, Kyungdon Joo, Namhun Kim, Jeong hwan Jeon, Hyemin Ahn
Technical Report *Equal contribution
  • Developed a low-cost human–robot interaction system for playing Gomoku, integrating real-time vision perception, RL-based decision-making, and robotic arm control.
  • Offers an affordable, real-world gaming experience that merges physical gameplay with intelligent decision-making.

Projects

Under Construction for details!

Experience

Visiting Student
University of Toronto
Jan 2025 – Jun 2025
  • Special MEng student at MIE – completed 4 graduate-level courses with a GPA of 3.95/4.0
  • Industrial project with Modiface (Technical Leading)
Research Assistant
3D Vision & Robotics Lab, UNIST
Mar 2024 – Aug 2026
  • Video understanding, Language-guided 3D scene understanding
  • Industrial project with Samsung Electronics (Technical Leading)
  • Teaching Assistant: AI Programming 2 (Sep 2024), Kyungnam Novatus Academia (Jul 2024)
Software Developer Intern
Jun 2023 – Aug 2023
  • Contributed to developing a building crack detection model integrated into diagnostic processes
  • Contributed to the initial development of a landlord–tenant community app using Flutter
Undergraduate Research Intern
Computer Vision Lab, University of Seoul
Apr 2022 – Jul 2023
  • Mainly studied Masked Image Modeling (MIM)-based ViT and CAM methods
  • Built AI-based plant feature extractor for urban forest management mobile platform

Awards & Honors

  • 🏆 3rd place, AWS DeepRacer Competition, BigData Winter Camp (2022)
  • 🏆 3rd place, Engineering Mathematics Competition, University of Seoul
    Awarded for three consecutive years: 2021, 2022, 2023
  • 🏆 3rd place, Spatial Convergence Big Data Idea Competition [page] (2023)
    Proposed and developed the company's core concept as part of the team
  • 🏆 3rd place, Syncathon Season 3 (AI development competition) [page] — "finSET" (2023)
    Serving as the team leader and project coordinator

Scholarships

Education

  • UNIST — M.S., Artificial Intelligence Graduate School (Expected Aug 2026), GPA: 4.03/4.3
    Advisor: Prof. Kyungdon Joo
  • University of Seoul — B.S., Electrical & Computer Engineering (Feb 2024), GPA: 3.98/4.5 (Major 4.06/4.5)
    Advisor: Prof. Yongchul Kim

© 2025 Yongjun Choi. All rights reserved.