Author

Gui-Zhen Chen

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Preprint Oct 2026

Diagnosing the Reference Gap: What Visual Scaffolds Can and Cannot Fix in Multimodal Reasoning

Multimodal large language models can recognize visual content yet struggle to reason reliably over it across multiple steps. In counting, a model may see all objects but lose track of which ones it has counted. We argue that such failures, commonly attributed to perception, reveal a reference gap: the failure to bind l...

Gui-Zhen Chen, Wei-Wen Xu, Wo-Tao Yin et al. · 0 citations

Sep 2026

Lingshu: Generalist Foundation Model for Unified Multimodal Medical Understanding and Reasoning.

This work proposes a comprehensive data-curation procedure that efficiently acquires rich medical knowledge data not only from medical imaging but also from extensive medical texts and general domain data and develops a medical-specialized MLLM, Lingshu-Med, which consistently outperforms existing multimodal baselines...

Wei-Wen Xu, Hou-Pong Chan, Long Li et al. · IEEE Transactions on Pattern... · 0 citations