Papers › Active Domain Adaptation via Clustering Uncertainty-weighted Embeddings

Active Domain Adaptation via Clustering Uncertainty-weighted Embeddings

16 Oct 2020ICCV 2021 10arXiv:2010.08666archive 2025-07-28

Viraj Prabhu, Arjun Chandrasekaran, Kate Saenko, Judy Hoffman

Generalizing deep neural networks to new target domains is critical to their real-world utility. In practice, it may be feasible to get some target data labeled, but to be cost-effective it is desirable to select a maximally-informative subset via active learning (AL). We study the problem of AL under a domain shift, called Active Domain Adaptation (Active DA). We demonstrate how existing AL approaches based solely on model uncertainty or diversity sampling are less effective for Active DA. We propose Clustering Uncertainty-weighted Embeddings (CLUE), a novel label acquisition strategy for Active DA that performs uncertainty-weighted clustering to identify target instances for labeling that are both uncertain under the model and diverse in feature space. CLUE consistently outperforms competing label acquisition strategies for Active DA and AL across learning settings on 6 diverse domain shifts for image classification.

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