Author

Zhiyu Lin

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Preprint Oct 2026

VTrajEmbed: Aligning Text with Video Object Trajectories via Spatiotemporal Embeddings

Fine-grained alignment between text and video object trajectories is a core challenge in multimodal understanding. Existing embedding models excel at global retrieval, yet their single global representation entangles multiple objects and their spatiotemporal dynamics, limiting direct object-level grounding. To address...

Rui-Zhi Chen, Zi-Ning Fan, Yu-Di Guo et al. · 0 citations

#artificial intelligence Preprint Oct 2026

MeSD: Multi-Evidence Self-Distillation for VideoLLM

While reinforcement learning with verifiable rewards provides reliable outcome supervision for VideoLLMs, sequence-level rewards offer limited token-level guidance. On-policy self-distillation addresses this limitation by conditioning a self-teacher on privileged information to provide dense token-level supervision. Ho...

Wei-Jie Zhu, Han Fang, Han-Yun Fu et al. · 0 citations

Jul 2026

GeoAnchor: Collaborative Reasoning via Latent Decomposition for 3D Spatial Understanding

GeoAnchor decomposes 3D spatial information into three complementary components: position latents for object grounding, direction latents for relational orientation, and geometry latents for scene structure, and is introduced a collaborative training strategy that guides the model from local spatial perception to compr...

Hao Li, Han Fang, Zixin Pan et al. · arXiv.org · 0 citations