Design of Visual Stimulation on Brain Computer Interface

• Main Authors: Tsai-Ya Hung, 洪才雅
• Other Authors: Sun,Koun-tem
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/6dwj8p

碩士 === 國立臺南大學 === 數位學習科技學系碩博士班 === 105 === Based on relevance literatures, this study is to improve the accuracy of the brainwave control brain-computer interface (BCI) system. The experimental design includes different stimulus intervals, moving ways, and color patterns. Thus, there are six kinds of experiments for three factors in the research methods. Twenty subjects participated the research. The results showed that the accuracy of the sixth experiment (the 400ms stimulation interval, from right to left movement, blue-white and green-white color alternately)is the best, and the target accuracy was up to 81%. Therefore, this study proposes three conditions to promote the accuracy as the improvement direction of the follow-up Brain-Computer Interface system: the longer stimulation interval, the direction of movement of the stimuli from right to left and the color stimulation alternately. In this study, the BCI system collected the brain wave data from the O1 electrode and analyzed the brain wave components of N200, P300, and N2P3 in Event-Related Potentials (ERPs). The target accuracy of N2P3 is the best, so N2P3 was used as the identification feature of brain wave. The study gives some suggestions to the future relation researchers, such as the stimulus coding methods.