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Assessment of preprocessing on classifiers used in the P300 speller paradigm

Mirghasemi, H ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1109/IEMBS.2006.259520
  3. Publisher: 2006
  4. Abstract:
  5. Artifact removal is an essential part in electroencephalogram (EEG) recording and the raw EEG signals require preprocessing before feature extraction. In this work, we implemented three filtering methods and demonstrated their effects on the performance of different classifiers. Bandpass digital filtering, median filtering and facet method are three preprocessing approaches investigated in this paper. We used data set lib from the BCI competition 2003 for training and testing phase. Our accuracy varied between 80% and 96%. In our work, we demonstrated that the problems of choosing the classifier and preprocessing methods are not independent of each other. Two of our approaches could achieve the 96% accuracy i.e. 31 of 32 characters were predicted correctly. These two approaches have different classifier and different preprocessing method. It means that the performance of each classifier can be enhanced with a specific preprocessing method. In our approach, we used only three electrodes of 64 applied electrodes. Therefore it can noticeably reduce the time and cost of EEG measurement. ©2006 IEEE
  6. Keywords:
  7. Artifacts ; Filtering methods ; P300 speller paradigm ; Preprocessing methods ; Bandpass amplifiers ; Biomedical engineering ; Data structures ; Electrodes ; Feature extraction ; Recording instruments ; Electroencephalography ; Algorithm ; Automated pattern recognition ; Comparative study ; Computer interface ; Evaluation study ; Event related potential ; Human ; Methodology ; Pattern recognition ; Physiology ; Reproducibility ; Sensitivity and specificity ; Task performance ; Algorithms ; Artificial intelligence ; Event-related potentials, P300 ; Humans ; Pattern recognition, automated ; Pattern recognition, visual ; Reproducibility of results ; Task performance and analysis ; User-computer interface
  8. Source: 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06, New York, NY, 30 August 2006 through 3 September 2006 ; 2006 , Pages 1319-1322 ; 05891019 (ISSN); 1424400325 (ISBN); 9781424400324 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/4462003