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Institute of Electrical and Electronics Engineers, IEEE Transactions on Neural Networks and Learning Systems, 11(27), p. 2426-2439, 2016

DOI: 10.1109/tnnls.2015.2487364

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Group Component Analysis for Multiblock Data: Common and Individual Feature Extraction

Journal article published in 2015 by Guoxu Zhou ORCID, Andrzej Cichocki, Yu Zhang, Danilo P. Mandic
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Real-world data are often acquired as a collection of matrices rather than as a single matrix. Such multiblock data are naturally linked and typically share some common features while at the same time exhibiting their own individual features, reflecting the underlying data generation mechanisms. To exploit the linked nature of data, we propose a new framework for common and individual feature extraction (CIFE) which identifies and separates the common and individual features from the multiblock data. Two efficient algorithms termed common orthogonal basis extraction (COBE) are proposed to extract common basis is shared by all data, independent on whether the number of common components is known beforehand. Feature extraction is then performed on the common and individual subspaces separately, by incorporating dimensionality reduction and blind source separation techniques. Comprehensive experimental results on both the synthetic and real-world data demonstrate significant advantages of the proposed CIFE method in comparison with the state-of-the-art.