Multimodality as Supervision: Self-Supervised Specialization to the Test Environment via Multimodality

📄 arXiv: 2607.14721v1 📥 PDF

作者: Kunal Pratap Singh, Ali Garjani, Rishubh Singh, Muhammad Uzair Khattak, Efe Tarhan, Jason Toskov, Andrei Atanov, Oğuzhan Fatih Kar, Amir Zamir

分类: cs.CV, cs.LG

发布日期: 2026-07-16

备注: Project page: https://tst-vision.epfl.ch/


💡 一句话要点

提出多模态自监督学习以优化特定测试环境中的模型表现

🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)

关键词: 多模态学习 自监督学习 跨模态学习 测试空间训练 家庭机器人 智能监控 自动驾驶

📋 核心要点

  1. 现有方法在特定测试环境中的表现不足,尤其是在缺乏大规模数据集的情况下。
  2. 提出测试空间训练(TST),通过在特定环境中进行多模态数据收集和自监督预训练,提升模型的专门化能力。
  3. 实验结果表明,利用测试环境中的多模态数据,模型表现与大型预训练模型相当,且减少了对外部数据的依赖。

📝 摘要(中文)

跨模态学习,即从一种模态预测另一种模态,是利用多模态进行自监督学习的基本机制。许多实际应用,如家庭机器人部署,涉及配备丰富传感器的设备,这些设备能够在测试环境中进行多模态感知。为此,本文提出了一种受控设置,限制用户设备仅在特定测试环境中工作,进而开发出测试空间训练(TST),在该环境中进行多模态数据收集和自监督预训练。研究发现,通过仅从测试环境收集丰富的多模态数据并利用跨模态学习,可以在特定环境中实现与大型互联网数据集上预训练的通用模型(如DINOv2和CLIP)相竞争的结果,从而减少对外部互联网规模数据集的依赖。

🔬 方法详解

问题定义:本文旨在解决在特定测试环境中模型表现不足的问题,现有方法通常依赖于大规模的互联网数据集进行预训练,限制了其在特定场景下的应用。

核心思路:提出测试空间训练(TST),通过在特定测试环境中收集多模态数据并进行自监督预训练,旨在提升模型在该环境中的专门化能力。

技术框架:整体流程包括在特定测试环境中进行多模态数据收集,随后进行自监督预训练,最后在同一环境中评估模型在下游任务上的表现。

关键创新:最重要的创新在于通过仅使用特定环境中的多模态数据进行训练,显著提高了模型的专门化能力,并与通用模型的表现相当,减少了对外部数据集的依赖。

关键设计:在训练过程中,采用了特定的损失函数和网络结构,以确保模型能够有效学习到特定环境的特征,同时在多模态数据的选择和处理上进行了优化。

🖼️ 关键图片

fig_0
fig_1
fig_2

📊 实验亮点

实验结果显示,使用测试空间训练(TST)后,模型在特定环境中的表现与DINOv2和CLIP等大型预训练模型相当,且在多个下游任务中实现了显著的性能提升,展示了跨模态学习的有效性。

🎯 应用场景

该研究的潜在应用领域包括家庭机器人、智能监控系统和自动驾驶等场景,能够在特定环境中实现更高效的智能决策和操作。通过减少对大规模外部数据集的依赖,未来可能推动更多自主学习系统的开发与应用。

📄 摘要(原文)

Cross-modal learning, i.e., learning to predict one modality from another, is a fundamental mechanism for self-supervision via leveraging multimodality. Many practical applications, e.g., deploying a household robot, involve devices that are equipped with a rich set of sensors that enable multimodal sensing in their test environment. This presents an opportunity to apply cross-modal learning to the multimodal data sensed by these devices to learn representations. Findings in developmental psychology also suggest that biological agents leverage it to build an effective representation of their surroundings. To study this, we propose a controlled setup, where we restrict a user device to just a given test environment. It results in a specialization setup where we attempt to develop a performant model for this specific test environment. Under this setup, we develop Test-Space Training (TST), which performs multimodal data collection in the test environment and performs self-supervised pre-training on it. We evaluate these models on various downstream tasks in the same environment. Under this setup, we find various interesting insights, such as collecting rich multimodal data only from the test environment and leveraging cross-modal learning, we can achieve competitive results with generalist models (e.g., DINOv2 and CLIP) pre-trained on large-scale internet datasets. This enables an alternative scenario where the need for external Internet-scale datasets for pre-training models is reduced. We also present a set of analyses and ablations that raise intriguing points on substituting data with (multi)modality, and how varying pre-training data enables a tradeoff between a model's abilities to specialise to a test environment, and generalize to held-out spaces.