Research Article Open Access

Classifying Single Trail Electroencephalogram Using Gaussian Smoothened Fast Hartley Transform for Brain Computer Interface during Motor Imagery

V. B. Deepa1, P. Thangaraj1 and S. Chitra1
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Journal of Computer Science
Volume 7 No. 5, 2011, 757-761

DOI: https://doi.org/10.3844/jcssp.2011.757.761

Submitted On: 14 January 2011 Published On: 7 May 2011

How to Cite: Deepa, V. B., Thangaraj, P. & Chitra, S. (2011). Classifying Single Trail Electroencephalogram Using Gaussian Smoothened Fast Hartley Transform for Brain Computer Interface during Motor Imagery. Journal of Computer Science, 7(5), 757-761. https://doi.org/10.3844/jcssp.2011.757.761

Abstract

Problem statement: Brain-Computer Interface (BCI) is a emerging research area which translates the brain signals for any motor related actions into computer understandable signals by capturing the signal, processing the signal and classifying the motor imagery. This area of work finds various applications in neuroprosthetics. Mental activity leads to changes of electrophysiological signals like the Electroencephalogram (EEG) or Electrocorticogram (ECoG). Approach: The BCI system detects such changes and transforms it into a control signal which can, for example, be used as to control a electric wheel. In this study the BCI paradigm is tested by our proposed Gaussian smoothened Fast Hartley Transform (GS-FHT) which is used to compute the energies of different motor imageries the subject thinks after selecting the required frequencies using band pass filter. Results: We apply this procedure to BCI Competition dataset IVA, a publicly available EEG repository. Conclusion: The evaluations of preprocessed signals showed that the extracted features were interpretable and can lead to high classification accuracy by various mining algorithms.

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Keywords

  • Data mining
  • Brain-Computer Interface (BCI)
  • Fast Hartley transform (FHT)
  • Electroencephalogram (EEG)
  • Motor Imagery (MI)
  • Common Spatial Pattern (CSP)
  • Event-Related Desynchronization/Synchronization (ERD/ERS)
  • Discrete Wavelet Transform (DWT)
  • Fourier Transform (FT)