期刊
APPLIED INTELLIGENCE
卷 52, 期 7, 页码 8038-8055出版社
SPRINGER
DOI: 10.1007/s10489-021-02756-x
关键词
Heterogeneous domain adaptation; Transfer learning; Crosslingual text categorization; Distribution matching
The paper introduces a novel method called SDA-PPLS for heterogeneous domain adaptation, which aligns statistical distributions and progressively selects pseudo labels to map source and target domains into a shared feature space effectively.
Heterogeneous domain adaptation (HDA) aims to adapt a trained model on a source domain with different input feature space to an unlabeled target domain. In fact, HDA is a challenging issue, since there exists feature and distribution discrepancies across domains. In this paper, we propose a novel approach named as heterogeneous domain adaptation with statistical distribution alignment and progressive pseudo label selection (SDA-PPLS). SDA-PPLS learns two projection matrices for source and target domains to map them into a latent subspace to have a shared feature space. Moreover, to mitigate the distribution gap, SDA-PPLS aligns both first-order and second-order statistical information, simultaneously, to improve the target classification model performance. In addition, to discriminate instances into distinct classes, SDA-PPLS aligns the class conditional distributions by pseudo label refinement of target domain data. Finally, to prevent the propagation of inaccurate pseudo labels to the next iteration, a progressive technique is proposed to select instances with higher probability. Experimental results on several real-word datasets on image to image, text to text and text to image tasks with different feature representations, demonstrate that the proposed method outperforms other state-of-the-art HDA methods.
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