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Joint local and statistical discriminant learning via feature alignment

  • Elahe Gholenji
  • Jafar TahmoresnezhadEmail author
Original Paper
  • 25 Downloads

Abstract

Image processing has attracted increasing attention in recent researches to solve domain shift problem where machine learning algorithms are applied to sets of unseen images. Domain shift problem occurs when the training (source domain) and test (target domain) sets are collected in different environmental conditions but in related domains. In this way, the adaptation across data distributions of the source and target datasets are suggested as domain adaptation framework to overcome the performance degradation. In this paper, a novel domain adaptation method referred as joint local and statistical discriminant learning via feature alignment (LSA), is proposed to find a cross-domain subspace by matching cross-domain distribution shift and adapting the class structures of the local and statistical distributions across the source and target domains, during the dimensionality reduction. Specifically, LSA projects samples into an embedded subspace in which the distances across the samples from same class are minimized and the distances across samples from different classes are maximized, at each local and statistical area, during alignment of marginal and conditional distributions. Furthermore, the class densities of samples based on manifold structure in different classes are preserved to provide more separability across various classes. To evaluate the proposed method, comprehensive experiments have been conducted on benchmark cross-domain object and digit recognition datasets. Experimental results have verified the superiority of LSA with a large margin in average classification accuracy against several state-of-the-art distribution matching and discriminant learning methods of domain adaptation. Moreover, the results have demonstrated the effectiveness of our proposed representation learning. Our source code is available at https://github.com/jtahmores/LSA.

Keywords

Visual domain adaptation Discriminative feature learning Statistical structure Local structure Distribution matching 

Notes

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of IT and Computer EngineeringUrmia University of TechnologyUrmiaIran

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