Topic · Multimodal
arxiv arXiv cs.AI · 8d ago

Dual-Agent Framework for Cross-Model Verified Translation

A dual-agent framework converts natural-language experiment protocols into executable commands for robotic lab platforms. It uses a Parser Agent and a rule-based mapping engine to translate protocols, with a heterogeneous LLM Validation Agent ensuring accuracy and triggering self-correction. The framework successfully enables end-to-end autonomous execution of microplate-based experiments like the Bradford assay.

arxiv arXiv cs.LG · 10d ago

Vision-language models don't always need images for chest X-ray accuracy

A causal audit shows that many vision-language models achieve high chest radiograph accuracy without using images. Text-only models match multimodal models in performance and outperform them in grounding, with accuracy and confidence flags only appearing when image use occurs. These findings suggest that accuracy alone is insufficient to validate clinical deployment, and grounding must be assessed.

arxiv arXiv cs.CL · 10d ago

Visuals Lie, Consistency Speaks: Disentangling Spatial Attention from Reliability in Vision-Language Models

A study challenges the assumption that visual attention signals reliability in vision-language models. It finds near-zero correlation between spatial attention and accuracy, showing instead that self-consistency across reasoning paths is a stronger predictor of truth. Reliability is better explained by generation dynamics and internal state distributions, not visual attention patterns.

arxiv arXiv cs.CL · 11d ago

ContextRL: Context-Aware RL for LLMs

ContextRL introduces an indirect auxiliary objective to improve long-horizon reasoning and multimodal performance in LLMs. It rewards models for selecting the context that supports a query-answer pair, using contrastive context data from coding agent trajectories and image-based visual questions. ContextRL achieves +2.2% and +1.8% gains over standard methods on long-horizon and visual QA benchmarks, with gains attributed to the selection objective, not data augmentation.

arxiv arXiv cs.AI · 11d ago

BinTrack: Open-Source Spatial QA with Binary Trajectory Search

BinTrack is a fully open-source spatial question answering agent that uses binary search over a robot's trajectory to locate answers. It achieves up to 22.8% higher accuracy than other open-source methods and matches closed-source model performance on the most challenging global category of the SpaceLocQA benchmark. The system also offers over 1.5x faster inference and introduces GangnamLoop, a real-world outdoor benchmark collected with a quadruped robot.

arxiv arXiv cs.LG · 7d ago

UNIEGO: Proxy-Mediated Unified Egocentric Video Representation

UNIEGO introduces a hierarchical multi-teacher distillation framework that uses proxy models to mediate knowledge transfer from nine diverse teachers across viewpoints and modalities. The Selective Proxy Distillation (SPD) stage adaptively selects reliable proxies during training, improving representation quality and stability. UNIEGO achieves state-of-the-art results in action recognition, video retrieval, and action segmentation on ego-exo benchmarks.

arxiv arXiv cs.CL · 7d ago

StylisticBias: Visual Cues Drive Most Social Biases in MLLMs

StylisticBias introduces a controlled benchmark to evaluate attribute-level social bias in multimodal large language models. It reveals that age and body type dominate identity-level effects, while fashion style and 15 key visual attributes drive most bias, accounting for nearly 80% of variation. The benchmark highlights that model judgments are most sensitive to appearance-related cues, especially in socioeconomic and style-based contexts.