Mr. Mingxuan Du Profile

Mingxuan Du

at Baidu Research

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Proceedings Article | 5 March 2022 Paper

Joint alignment and compactness learning for multi-source unsupervised domain adaptation

Yuhong Zhang, Mingxuan Du, Fuzhen Zhuang, Yuxi Jin, Yuhui Ma, Hongbo Zhang

Proceedings Volume 12084, 120841E (2022) https://doi.org/10.1117/12.2623645

KEYWORDS: Statistical modeling, Object recognition, Visualization, Neural networks, Detection and tracking algorithms, Image visualization, Gallium nitride, Tin, Stochastic processes, Prototyping

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Multi-source unsupervised domain adaptation (MUDA) has received increasing attention that leverages the knowledge from multiple relevant source domains with different distributions to improve the learning performance of the target domain. The most common approach for MUDA is to perform pairwise distribution alignment between the target and each source domain. However,existing methods usually treat each source domain identically in source-source and source-target alignment, which ignores the difference of multiple source domains and may lead to imperfect alignment. In addition, these methods often neglect the samples near the classification boundaries during adaptation process, resulting in misalignment of these samples. In this paper, we propose a new framework for MUDA, named Joint Alignment and Compactness Learning (JACL). We design an adaptive weighting network to automatically adjust the importance of marginal and conditional distribution alignment, and such weights are adopted to adaptively align each pair of source-target domains. We further propose to learn intra-class compact features for some target samples that lie in boundaries to reduce the domain shift. Extensive experiments demonstrate that our method can achieve remarkable results in three datasets (Digit-five, Office-31, and Office-Home) compared to recently strong baselines.

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