Author

Si-Wen Jiao

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Jul 2026

IoUPD: IoU-Aware Privileged Distillation for Visual Grounding with Multimodal Large Language Models

Experiments on standard referring-expression grounding benchmarks show consistent region-level improvements over strong coordinate-generating baselines, demonstrating that ground-truth boxes can provide useful privileged guidance beyond serving as coordinate labels.

Xiuyuan Zhu, Ke Lu, Hao Wu et al. · arXiv.org · 0 citations

Preprint Aug 2026

Hi-Token: Hierarchical Coordinate Tokenization for Generative Visual Grounding

The results show that structured coordinate generation provides an effective approach to generative visual grounding and Hi-Token encodes each coordinate with axis-specific tokens for the hundreds, tens, and ones digits, which adds coarse-to-fine structure and increases token reuse while retaining the existing VLM arch...

Xiuyuan Zhu, Ke Lu, Kun Dong et al. · 0 citations