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arXiv 2404.14696cs.CV

基于负文本语义与不确定性建模的自适应提示学习用于通用多源域适应

Adaptive Prompt Learning with Negative Textual Semantics and Uncertainty Modeling for Universal Multi-Source Domain Adaptation

Sichuan University(四川大学)

Yuxiang Yang, Lu Wen, Yuanyuan Xu, Jiliu Zhou, Yan Wang

AI总结:

针对通用多源域适应中忽略文本语义的问题,提出基于CLIP的APNE-CLIP方法,利用自适应提示、负文本语义对齐和能量不确定性建模,有效识别未知样本并提升分类性能。

摘要:

通用多源域适应(Universal Multi-source Domain Adaptation, UniMDA)旨在将知识从多个已标注的源域迁移至未标注的目标域,同时应对域偏移(不同数据分布)和类别偏移(未知目标类别)。现有解决方案侧重于挖掘图像特征以检测未知样本,忽略了文本语义中蕴含的丰富信息。本文针对 UniMDA 分类任务,提出了一种基于对比语言-图像预训练(Contrastive Language-Image Pre-training, CLIP)的自适应提示学习结合负文本语义与不确定性建模方法(APNE-CLIP)。具体而言,我们利用带有自适应提示的 CLIP 来获取类别语义和域表示的文本信息,帮助模型识别未知样本并应对域偏移。此外,我们设计了一种新颖的全局实例级对齐目标,利用负文本语义实现更精确的图像-文本对对齐。进一步地,我们提出了一种基于能量的不确定性建模策略,以扩大已知样本与未知样本之间的边界距离。大量实验验证了所提方法的优越性。

英文摘要:

Universal Multi-source Domain Adaptation (UniMDA) transfers knowledge from multiple labeled source domains to an unlabeled target domain under domain shifts (different data distribution) and class shifts (unknown target classes). Existing solutions focus on excavating image features to detect unknown samples, ignoring abundant information contained in textual semantics. In this paper, we propose an Adaptive Prompt learning with Negative textual semantics and uncErtainty modeling method based on Contrastive Language-Image Pre-training (APNE-CLIP) for UniMDA classification tasks. Concretely, we utilize the CLIP with adaptive prompts to leverage textual information of class semantics and domain representations, helping the model identify unknown samples and address domain shifts. Additionally, we design a novel global instance-level alignment objective by utilizing negative textual semantics to achieve more precise image-text pair alignment. Furthermore, we propose an energy-based uncertainty modeling strategy to enlarge the margin distance between known and unknown samples. Extensive experiments demonstrate the superiority of our proposed method.

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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