TY - GEN
T1 - On the performance comparison of using checkerboard and flash ball visual stimulators for SSVEP-based BCI system
AU - Saetang, Jannipa
AU - Punsawad, Yunyong
AU - Wongsawat, Yodchanan
PY - 2013
Y1 - 2013
N2 - Searching for the visual stimulators that can reduce eye-fatigue and enhance the performance of the steady state visual evoked potential (SSVEP)-based brain computer interface (BCI) system is one of the challenging problem in BCI research. In this paper, we compare the multi-command selection performance of the two visual stimulators, i.e. the proposed flash ball and the conventional checkerboard patterns, on the liquid crystal display (LCD) screen. Each visual stimulator consists of 12 commands with different flickering frequencies. These visual stimulators are evaluated with four subjects. Fast Fourier transform FFT is used to simply extract the features of interest. The results show that, by employing the flash ball pattern, the average accuracy is 76.67% which is higher than 60% accuracy of the checkerboard pattern.
AB - Searching for the visual stimulators that can reduce eye-fatigue and enhance the performance of the steady state visual evoked potential (SSVEP)-based brain computer interface (BCI) system is one of the challenging problem in BCI research. In this paper, we compare the multi-command selection performance of the two visual stimulators, i.e. the proposed flash ball and the conventional checkerboard patterns, on the liquid crystal display (LCD) screen. Each visual stimulator consists of 12 commands with different flickering frequencies. These visual stimulators are evaluated with four subjects. Fast Fourier transform FFT is used to simply extract the features of interest. The results show that, by employing the flash ball pattern, the average accuracy is 76.67% which is higher than 60% accuracy of the checkerboard pattern.
KW - Brain computer interface (BCI)
KW - Steady state visual evoke potential (SSVEP)
KW - Visual stimulator
UR - http://www.scopus.com/inward/record.url?scp=84876033665&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-29305-4_407
DO - 10.1007/978-3-642-29305-4_407
M3 - Conference contribution
AN - SCOPUS:84876033665
SN - 9783642293047
T3 - IFMBE Proceedings
SP - 1549
EP - 1552
BT - World Congress on Medical Physics and Biomedical Engineering
T2 - World Congress on Medical Physics and Biomedical Engineering
Y2 - 26 May 2012 through 31 May 2012
ER -