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arXiv 2504.13621cs.CV

面向第一人称视角助手的视觉意图定位

Visual Intention Grounding for Egocentric Assistants

National University of Singapore(新加坡国立大学);Google DeepMind(谷歌DeepMind)

Pengzhan Sun, Junbin Xiao, Tze Ho Elden Tse, Yicong Li, Arjun Akula, Angela Yao

AI总结:

本文提出首个第一人称视觉意图定位数据集EgoIntention,及推理至定位(RoG)指令微调方法,解决多模态模型在第一人称视角下的意图定位问题,实现了统一的视觉定位能力。

摘要:

视觉定位是将文本描述与图像中的物体关联起来的技术。传统方法以第三人称视角的图像输入和命名物体查询为目标,而在AI助手等应用场景中,视角发生了转变——输入为第一人称视角(egocentric),物体可能通过需求和意图被隐式提及。为弥合这一差距,本文提出首个用于第一人称视觉意图定位的数据集EgoIntention。该数据集要求多模态大语言模型(LLM)完成两项任务:1)理解并忽略无关的上下文物体;2)推理不常见物体的功能。基准测试结果显示,现有模型在第一人称视角下会错误识别上下文物体,且缺乏对物体可供性(affordance)的理解。此外,本文提出了推理至定位(Reason-to-Ground, RoG)指令微调方法,该方法可通过链式意图推理与物体定位机制,实现对常规描述和第一人称意图的混合训练。在EgoIntention数据集上,RoG方法的性能显著优于简单微调及混合训练,同时在常规描述定位任务上保持或略有提升。这一进展实现了针对第一人称和第三人称视觉输入的统一视觉定位,可处理显式物体查询与隐式人类意图。

英文摘要:

Visual grounding associates textual descriptions with objects in an image. Conventional methods target third-person image inputs and named object queries. In applications such as AI assistants, the perspective shifts -- inputs are egocentric, and objects may be referred to implicitly through needs and intentions. To bridge this gap, we introduce EgoIntention, the first dataset for egocentric visual intention grounding. EgoIntention challenges multimodal LLMs to 1) understand and ignore unintended contextual objects and 2) reason about uncommon object functionalities. Benchmark results show that current models misidentify context objects and lack affordance understanding in egocentric views. We also propose Reason-to-Ground (RoG) instruction tuning; it enables hybrid training with normal descriptions and egocentric intentions with a chained intention reasoning and object grounding mechanism. RoG significantly outperforms naive finetuning and hybrid training on EgoIntention, while maintaining or slightly improving naive description grounding. This advancement enables unified visual grounding for egocentric and exocentric visual inputs while handling explicit object queries and implicit human intentions.

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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