Author

Huijia Zhu

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#artificial intelligence May 2026

Causal Probing for Internal Visual Representations in Multimodal Large Language Models

This work proposes a causal framework based on activation steering to actively probe and manipulate internal visual representations, revealing a divergence in concept encoding: entity knowledge is distinctively localized, whereas abstract concepts are globally distributed across the network.

Zehao Deng, Tianjie Ju, Zheng Wu et al. · arXiv.org · 0 citations

Preprint Aug 2026

Enhancing Localized Reasoning for Long Video Understanding via Efficient Segment-to-Video Supervision

Experimental results demonstrate that S2V can consistently improve LVU performance across multiple LVU benchmarks, outperforming both general MLLMs and reasoning-based methods not only in LVU accuracy but also in training and inference efficiency.

Beibei Zhang, Chao Xu, Jun Lan et al. · 0 citations