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Casting a BAIT for Offline and Online Source-free Domain Adaptation
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We address the source-free domain adaptation (SFDA) problem, where only the source model is available during adaptation to the target domain. We consider two settings: the offline setting where all target data can be visited multiple times (epochs) to arrive at a prediction for each target sample, and the online setting where the target data needs to be directly classified upon arrival. Inspired by diverse classifier based domain adaptation methods, in this paper we introduce a second classifier, but with another classifier head fixed. When adapting to the target domain, the additional classifier initialized from source classifier is expected to find misclassified features. Next, when updating the feature extractor, those features will be pushed towards the right side of the source decision boundary, thus achieving source-free domain adaptation. Experimental results show that the proposed method achieves competitive results for offline SFDA on several benchmark datasets compared with existing DA and SFDA methods, and our method surpasses by a large margin other SFDA methods under online source-free domain adaptation setting.
Forward citations
Cited by 4 Pith papers
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Energy-Based Pseudo-Label Refining for Source-free Domain Adaptation
Energy-based pseudo-label refining with adaptive global/class thresholds and contrastive consistency training improves source-free domain adaptation accuracy on Office-31, Office-Home, and VisDA-C.
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DRIVE: Dual-Robustness via Information Variability and Entropic Consistency in Source-Free Unsupervised Domain Adaptation
DRIVE adapts a classifier to an unlabeled target domain by running two model copies with PGD perturbations and entropy-weighted pseudo-labels, reporting small accuracy gains over DIFO on three benchmarks.
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Step-wise Distribution Alignment Guided Style Prompt Tuning for Source-free Cross-domain Few-shot Learning
StepSPT adapts frozen pre-trained models to new domains by learning a style prompt through step-wise distribution alignment plus classifier updates, improving source-free cross-domain few-shot accuracy.
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Source-Free Domain Adaptation via Multi-view Contrastive Learning
A three-phase SFUDA method claims state-of-the-art accuracy on VisDA-2017, Office-Home, and Office-31, but the evidence is internally inconsistent.
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