Volume 38, Number 4, August 2020
|828 - 837
|06 October 2020
Unsupervised Domain Adaptation Method Based on Discriminant Sample Selection
School of Mathematics and Statistics, Northwestern Polytechnical University, Xi'an 710072, China
In order to solve the problem that low classification accuracy caused by the different distribution of training set and test set, an unsupervised domain adaptation method based on discriminant sample selection (DSS) is proposed. DSS projects the samples of different domains onto a same subspace to reduce the distribution discrepancy between the source domain and the target domain, and weights the source domain instances to make the samples more discriminant. Different from the previous method based on the probability density estimation of samples, DSS tries to obtain the sample weights by solving a quadratic programming problem, which avoids the distribution estimation of samples and can be applied to any fields without suffering from the dimensional trouble caused by high-dimensional density estimation. Finally, DSS congregates the same classes by minimizing the intra-class distance. Experimental results show that the proposed method improves the classification accuracy and robustness.
Key words: sample selection / domain adaptation / quadratic programming / intra-class distance / classification
关键字 : 样本选择 / 领域自适应 / 二次规划 / 类内距离 / 分类
© 2020 Journal of Northwestern Polytechnical University. All rights reserved.
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