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Paper Abstract and Keywords
Presentation 2014-11-17 17:00
[Poster Presentation] Importance-Weighted Covariance Estimation for Robust Common Spatial Pattern
Alessandro Balzi (PoliMi), Florian Yger, Masashi Sugiyama (Univ. of Tokyo)
Abstract (in Japanese) (See Japanese page) 
(in English) Non-stationarity is an important issue for practical applications of machine learning methods. This issue particularly affects Brain-Computer Interfaces (BCI) and tends to make their use difficult. In this paper, we show a practical way to make Common Spatial Pattern (CSP), a classical feature extraction that is particularly useful in BCI, robust to non-stationarity. To do so, we did not modify the CSP method itself, but rather make the covariance estimation (used as input by every CSP variant) more robust to non-stationarity. Those robust estimators are derived using a classical importance-weighting scenario. Finally, we highlight the behaviour of our robust framework on a toy dataset and show gains of accuracy on a real-life BCI dataset.
Keyword (in Japanese) (See Japanese page) 
(in English) Covariance estimation / Common Spatial Pattern / Brain-Computer Interface / / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 306, IBISML2014-40, pp. 41-48, Nov. 2014.
Paper # IBISML2014-40 
Date of Issue 2014-11-10 (IBISML) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee IBISML  
Conference Date 2014-11-17 - 2014-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IBISML 
Conference Code 2014-11-IBISML 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Importance-Weighted Covariance Estimation for Robust Common Spatial Pattern 
Sub Title (in English)  
Keyword(1) Covariance estimation  
Keyword(2) Common Spatial Pattern  
Keyword(3) Brain-Computer Interface  
1st Author's Name Alessandro Balzi  
1st Author's Affiliation Politecnico di Milano (PoliMi)
2nd Author's Name Florian Yger  
2nd Author's Affiliation University of Tokyo (Univ. of Tokyo)
3rd Author's Name Masashi Sugiyama  
3rd Author's Affiliation University of Tokyo (Univ. of Tokyo)
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Date Time 2014-11-17 17:00:00 
Presentation Time 180 
Registration for IBISML 
Paper # IEICE-IBISML2014-40 
Volume (vol) IEICE-114 
Number (no) no.306 
Page pp.41-48 
#Pages IEICE-8 
Date of Issue IEICE-IBISML-2014-11-10 

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