arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2510.24331cs.LGcs.CV
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视觉-语言模型在上下文中能看到什么?探究多模态上下文学习

What do vision-language models see in the context? Investigating multimodal in-context learning

Instituto de Computação, Universidade Estadual de Campinas (UNICAMP)(计算机学院,Campinas州立大学(UNICAMP))

Gabriel O. dos Santos, Esther Colombini, Sandra Avila

AI总结:

该研究系统探究视觉-语言模型的多模态上下文学习能力,分析提示、架构、训练策略的影响及注意力模式,揭示当前模型多模态整合有限等局限及指令对齐与上下文适应的权衡,为相关能力增强提供思路。

摘要:

上下文学习(ICL)使大语言模型(LLM)无需更新参数即可从演示示例中学习任务。尽管该技术在LLM中已被广泛研究,但它在视觉-语言模型(VLM)中的有效性仍未得到充分探索。本研究对VLM中的ICL展开系统性研究,在三个图像描述基准上评估了涵盖四种架构的七款模型。我们分析了提示设计、架构选择和训练策略如何影响多模态ICL。据我们所知,我们是首个分析VLM中注意力模式如何随上下文演示示例数量增加而变化的研究。结果表明,在图像-文本交错数据上训练可提升ICL性能,但并不意味着模型能有效整合演示示例中的视觉与文本信息。相比之下,指令微调提升了指令遵循能力,但会降低对上下文演示示例的依赖,这表明指令对齐与上下文适应之间存在权衡。注意力分析进一步显示,当前VLM主要关注文本线索,未能利用视觉信息,说明其多模态整合能力有限。这些发现凸显了当前VLM在ICL能力方面的关键局限,为增强其从多模态上下文示例中学习的能力提供了思路。

英文摘要:

In-context learning (ICL) enables Large Language Models (LLMs) to learn tasks from demonstration examples without parameter updates. Although it has been extensively studied in LLMs, its effectiveness in Vision-Language Models (VLMs) remains underexplored. In this work, we present a systematic study of ICL in VLMs, evaluating seven models spanning four architectures on three image captioning benchmarks. We analyze how prompt design, architectural choices, and training strategies influence multimodal ICL. To our knowledge, we are the first to analyze how attention patterns in VLMs vary with an increasing number of in-context demonstrations. Our results reveal that training on imag-text interleaved data enhances ICL performance but does not imply effective integration of visual and textual information from demonstration examples. In contrast, instruction tuning improves instruction-following but can reduce reliance on in-context demonstrations, suggesting a trade-off between instruction alignment and in-context adaptation. Attention analyses further show that current VLMs primarily focus on textual cues and fail to leverage visual information, suggesting a limited capacity for multimodal integration. These findings highlight key limitations in the ICL abilities of current VLMs and provide insights for enhancing their ability to learn from multimodal in-context examples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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