Wonseok Choi

I am a Ph.D. student at the POSTECH Graduate School of Artificial Intelligence, advised by Tae-Hyun Oh. Before joining POSTECH, I received my B.Sc. degree in Computer Science and Artificial Intelligence from the University of Birmingham, where I was advised by Hyung Jin Chang and Jianbo Jiao. My research focuses on visual perception and reasoning in complex environments, with a particular interest in uncertainty, grounded understanding, and embodied intelligence. I study how machines perceive, reason about, and evaluate visual information under ambiguity, and how active and physical interaction with the environment can reduce uncertainty and support more reliable decision making.

Email / Google Scholar Scholar / LinkedIn

Research Interests

Visual perception and reasoning under uncertainty in complex environments
Grounded reasoning, evaluation, and benchmarking for multimodal and embodied systems
Active and physical interaction for reducing uncertainty in embodied intelligence

Projects

	Aligning What Vision-Language Models See and Perceive with Adaptive Information Flow Chengxin Liu, Wonseok Choi, Chenshuang Zhang, Tae-Hyun Oh CVPR 2026 project page / arXiv (TBU)
	Patch-wise Retrieval: A Bag of Practical Techniques for Instance-level Matching Wonseok Choi, Sohwi Lim, Nam Hyeon-Woo, Moon Ye-Bin, Dong-Ju Jeong, Jinyoung Hwang, Tae-Hyun Oh WACV 2026 [Workshop] ICCVw 2025 (eXCV: Explainable Computer Vision: Quo Vadis?) project page / arXiv
	VLM's Eye Examination: Instruct and Inspect Visual Competency of Vision Language Models Nam Hyeon-Woo, Moon Ye-Bin, Wonseok Choi, Lee Hyun, Tae-Hyun Oh TMLR 2025 arXiv
	SYNAuG: Exploiting Synthetic Data for Data Imbalance Problems Moon Ye-Bin, Nam Hyeon-Woo, Wonseok Choi, Nayeong Kim, Suha Kwak, Tae-Hyun Oh Pattern Recognition Letters 2025 arXiv
	BEAF: Observing BEfore-AFter Changes to Evaluate Hallucination in Vision-language Models Moon Ye-Bin, Nam Hyeon-Woo, Wonseok Choi, Tae-Hyun Oh ECCV 2024 project page / arXiv

Education

B.Sc. in Computer Science and Artificial Intelligence
University of Birmingham, Birmingham, United Kingdom
First Class with Honours
2019.09 - 2022.12

Integrated Ph.D. in Graduate School of Artificial Intelligence
Pohang University of Science and Technology (POSTECH), Pohang, South Korea
2023.03 - Present

Teaching Experiences

2023.02 - 2023.06, Introduction to Machine Learning (EECE454), POSTECH
2025.02 - 2025.06, Deep Learning Natural Language Processing (CSED554), POSTECH
2025.09 - 2025.12, Computer Vision (CSED441), POSTECH