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research article

Common Information Components Analysis

Sula, Erixhen  
•
Gastpar, Michael C.  
February 1, 2021
Entropy

Wyner's common information is a measure that quantifies and assesses the commonality between two random variables. Based on this, we introduce a novel two-step procedure to construct features from data, referred to as Common Information Components Analysis (CICA). The first step can be interpreted as an extraction of Wyner's common information. The second step is a form of back-projection of the common information onto the original variables, leading to the extracted features. A free parameter gamma controls the complexity of the extracted features. We establish that, in the case of Gaussian statistics, CICA precisely reduces to Canonical Correlation Analysis (CCA), where the parameter gamma determines the number of CCA components that are extracted. In this sense, we establish a novel rigorous connection between information measures and CCA, and CICA is a strict generalization of the latter. It is shown that CICA has several desirable features, including a natural extension to beyond just two data sets.

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Type
research article
DOI
10.3390/e23020151
Web of Science ID

WOS:000622503300001

Author(s)
Sula, Erixhen  
•
Gastpar, Michael C.  
Date Issued

2021-02-01

Published in
Entropy
Volume

23

Issue

2

Start page

151

Subjects

Physics, Multidisciplinary

•

Physics

•

common information

•

dimensionality reduction

•

feature extraction

•

unsupervised

•

canonical correlation analysis

•

cca

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LINX  
Available on Infoscience
March 26, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176229
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