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research article

End-to-end kernel learning via generative random Fourier features

Fang, Kun
•
Liu, Fanghui  
•
Huang, Xiaolin
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February 1, 2023
Pattern Recognition

Random Fourier features (RFFs) provide a promising way for kernel learning in a spectral case. Current RFFs-based kernel learning methods usually work in a two-stage way. In the first-stage process, learn-ing an optimal feature map is often formulated as a target alignment problem, which aims to align the learned kernel with a pre-defined target kernel (usually the ideal kernel). In the second-stage process, a linear learner is conducted with respect to the mapped random features. Nevertheless, the pre-defined kernel in target alignment is not necessarily optimal for the generalization of the linear learner. Instead, in this paper, we consider a one-stage process that incorporates the kernel learning and linear learner into a unifying framework. To be specific, a generative network via RFFs is devised to implicitly learn the kernel, followed by a linear classifier parameterized as a full-connected layer. Then the generative net-work and the classifier are jointly trained by solving an empirical risk minimization (ERM) problem to reach a one-stage solution. This end-to-end scheme naturally allows deeper features, in correspondence to a multi-layer structure, and shows superior generalization performance over the classical two-stage, RFFs-based methods in real-world classification tasks. Moreover, inspired by the randomized resampling mechanism of the proposed method, its enhanced adversarial robustness is investigated and experimen-tally verified.(c) 2022 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.patcog.2022.109057
Web of Science ID

WOS:000877037900005

Author(s)
Fang, Kun
Liu, Fanghui  
Huang, Xiaolin
Yang, Jie
Date Issued

2023-02-01

Publisher

ELSEVIER SCI LTD

Published in
Pattern Recognition
Volume

134

Article Number

109057

Subjects

Computer Science, Artificial Intelligence

•

Engineering, Electrical & Electronic

•

Computer Science

•

Engineering

•

generative random fourier features

•

kernel learning

•

end-to-end

•

one-stage

•

generative network

•

adversarial robustness

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIONS  
Available on Infoscience
January 16, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/193747
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