Title :
An implementation of SSVEP-BCI system based on a cluster measure for feature selection
Author :
Suarez, Luisa ; Cardozo, Eleri ; Attux, Romis ; Soriano, D.
Author_Institution :
FEEC, UNICAMP, Campinas, Brazil
Abstract :
The main objective of a brain-computer interface (BCI) is to create alternative communication channels between the brain and a machine using information from cerebral responses. Among the possible paradigms to design a BCI system, this work focuses on Steady-State Visually Evoked Potentials (SSVEP). SSVEP are brain responses synchronized with fast repetitive external visual stimuli. The SSVEP-BCI system is able to meet many of the requirements of a strict BCI, but still needs to reduce the influence of noise on the Electroencephalogram (EEG) signal in order to improve its performance. In this paper, a novel SSVEP-BCI system is presented and analyzed in detail. The system is based on three pillars: spectrum estimation, systematic feature selection - for which different heuristics were proposed here -, and linear classification.
Keywords :
brain-computer interfaces; electroencephalography; feature selection; medical signal processing; signal classification; spectral analysis; visual evoked potentials; BCI system design; EEG; SSVEP-BCI system; alternative communication channels; brain responses; brain-computer interface; cerebral responses; cluster measure; electroencephalogram signal; fast repetitive external visual stimuli; heuristics; linear classification; machine; noise influence; spectrum estimation; steady-state visually evoked potentials; strict BCI; systematic feature selection; Brain-computer interfaces; Electrodes; Electroencephalography; Feature extraction; Indexes; Vectors; Visualization; BCI — Brain-Computer Interface; Davies Bouldin index; EEG — Electroencephalogram; Feature selection; Linear Discriminant Analysis; Power Spectral Density; SSVEP — Steady-State Visual Evoked Potential;
Conference_Titel :
Biosignals and Biorobotics Conference (2014): Biosignals and Robotics for Better and Safer Living (BRC), 5th ISSNIP-IEEE
Conference_Location :
Salvador
Print_ISBN :
978-1-4799-5688-3
DOI :
10.1109/BRC.2014.6880994
