Domain Adaptation via Rebalanced Sub-domain Alignment

Unsupervised domain adaptation (UDA) is a technique used to transfer knowledge from a labeled source domain to a different but related unlabeled target domain. While many UDA methods have shown success in the past, they often assume that the source and target domains must have identical class label...

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Bibliographic Details
Published in:arXiv.org 2023-02
Main Authors: Liu, Yiling, Dong, Juncheng, Jiang, Ziyang, Aloui, Ahmed, Li, Keyu, Klein, Hunter, Tarokh, Vahid, Carlson, David
Format: Article
Language:English
Subjects:
Adaptation
Algorithms
Domains
Knowledge management
Online Access:Get full text
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Summary:Unsupervised domain adaptation (UDA) is a technique used to transfer knowledge from a labeled source domain to a different but related unlabeled target domain. While many UDA methods have shown success in the past, they often assume that the source and target domains must have identical class label distributions, which can limit their effectiveness in real-world scenarios. To address this limitation, we propose a novel generalization bound that reweights source classification error by aligning source and target sub-domains. We prove that our proposed generalization bound is at least as strong as existing bounds under realistic assumptions, and we empirically show that it is much stronger on real-world data. We then propose an algorithm to minimize this novel generalization bound. We demonstrate by numerical experiments that this approach improves performance in shifted class distribution scenarios compared to state-of-the-art methods.
ISSN:2331-8422