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Context-Aware Mixup for Domain Adaptive Semantic Segmentation

journal contribution
posted on 2023-02-13, 02:53 authored by Q Zhou, Z Feng, Q Gu, J Pang, G Cheng, Xuequan LuXuequan Lu, J Shi, L Ma
Unsupervised domain adaptation (UDA) aims to adapt a model of the labeled source domain to an unlabeled target domain. Existing UDA-based semantic segmentation approaches always reduce the domain shifts in pixel level, feature level, and output level. However, almost all of them largely neglect the contextual dependency, which is generally shared across different domains, leading to less-desired performance. In this paper, we propose a novel Context-Aware Mixup (CAMix) framework for domain adaptive semantic segmentation, which exploits this important clue of context-dependency as explicit prior knowledge in a fully end-to-end trainable manner for enhancing the adaptability toward the target domain. Firstly, we present a contextual mask generation strategy by leveraging the accumulated spatial distributions and prior contextual relationships. The generated contextual mask is critical in this work and will guide the context-aware domain mixup on three different levels. Besides, provided the context knowledge, we introduce a significance-reweighted consistency loss to penalize the inconsistency between the mixed student prediction and the mixed teacher prediction, which alleviates the negative transfer of the adaptation, e.g., early performance degradation. Extensive experiments and analysis demonstrate the effectiveness of our method against the state-of-the-art approaches on widely-used UDA benchmarks.

History

Journal

IEEE Transactions on Circuits and Systems for Video Technology

Volume

33

Pagination

804-817

ISSN

1051-8215

eISSN

1558-2205

Publication classification

C1 Refereed article in a scholarly journal

Issue

2

Publisher

Institute of Electrical and Electronics Engineers (IEEE)