Author

Zhi Zheng

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Jul 2026

Groc-PO: Grounded Context Preference Optimization for Truthful Multimodal LLMs

Extensive experiments show that Groc-PO achieves improved performance in hallucination mitigation, faithful reasoning, and overall reliability, supporting the value of more explicit grounded supervision for trustworthy multimodal reasoning.

Zhi Zheng, Zheren Fu, Zhiyuan Yao et al. · arXiv.org · 1 citation

Jun 2026

ADAPT: Attention Dynamics Alignment with Preference Tuning for Faithful MLLMs

This work provides an attention-based perspective on mitigating hallucinations by exploring the model's internal text-to-image cross-attention behaviors, and proposes ADAPT, an attention-based framework that intervenes directly on text-to-image cross-attention dynamics.

Zhiyuan Yao, Zheren Fu, Zhi Zheng et al. · arXiv.org · 0 citations