Ruei-Chi Lai

Hello! I'm Ricky, a Research Assistant at the Vision Science Lab, National Tsing Hua University, advised by Prof. Min Sun on making MLLMs smarter and more efficient. I received my B.S. in Electrical Engineering & Computer Science from National Tsing Hua University in June 2025.

Currently, my research focuses on 3D scene understanding for robotics and MLLMs, as well as Vision-Language-Action Models (VLAs).

Looking ahead, I aim to pursue a PhD in 2027 in robotics and MLLMs.

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Publications

Proposed online Geometry-aware token pruning method leveraging 3D information to identify overlapped redundant visual tokens in 3D scenes, achieving token reduction and +5.1 improvement on OpenEQA gain without fine-tuning.

A training-free framework for embodied QA that leverages question context to identify relevant objects and views in a scene, achieving consistent improvements across multiple 3DQA benchmarks without model fine-tuning.

Discovered that token pruning causes catastrophic performance drops in visual grounding due to misaligned position IDs. Our simple solution, GAP, recovers 90% of original grounding performance without additional training or computational overhead.

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