PhD Position F/M Toward Grounded, Consistent, and Temporally Faithful Video Reasoning

PhD Position F/M Toward Grounded, Consistent, and Temporally Faithful Video Reasoning

Type de contrat : CDD

Niveau de diplôme exigé : Bac + 5 ou équivalent

Fonction : Doctorant

Niveau d'expérience souhaité : Jeune diplômé

Mission confiée

Recent video multimodal large language models (Video-MLLMs) have achieved
strong results on standard benchmarks, yet remain systematically unreliable on tasks
requiring temporally consistent, spatially grounded reasoning. Video-LLMs achieve
near-chance consistency (≈50%) in temporal grounding even after task-specific fine-
tuning; they hallucinate actions, temporal sequences, and scene transitions at
high rates; and they perform close to random on 4D spatiotemporal tasks (GPT-
4o: 57.5% vs. 98.8% human) and multi-object dynamic spatial reasoning.
These failures are st...