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Jungwoo Park

DMIS Lab, Korea University

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#artificial intelligence Preprint Oct 2026

UltraBERT: Beyond the Limit of BERT Pre-Training

Recent bidirectional encoders have been modernized with innovations from causal large language models (LLMs). However, the pretraining recipe itself remains inherited from small-scale conventions, leaving encoders underoptimized, with no single model performing competitively across both classification and retrieval tas...

Jungwoo Park, Taewhoo Lee, Jaewoo Kang · 0 citations
#computer vision Jul 2026

Do All Visual Tokens Matter Equally? Object-Evidence Preserving Token Merging for Vision-Language Retrieval

SaMer is proposed, an object-aware token merging framework that compresses image-side post-projector tokens into representative centroids while preserving the original late-interaction interface, and outperforms compression baselines and shows stronger phrase-level grounding, suggesting that efficient multi-vector retr...

Suhyeong Park, Junha Jung, Jungwoo Park et al. · 1 citation

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