脑机接口1.ppt

Reporter:Number:Brain-Computer Interface1精选CONTENTSpIntroductionpTheorypApplicationspFuture Work2精选what is BCI?Abraincomputer interface(BCI),oftencalledamind-machine interface(MMI),orsometimescalledabrainmachine interface(BMI),isadirectcommunicationpathwaybetweenthebrainandanexternaldevice.INTRODUCTION3精选.EEG pAn electroencephalogram is a measure of the brains voltage fluctuations as detected from scalp electrodes.pIt is an approximation of the cumulative electrical activity of neurons.fig1.electroencephalogram4精选theoryfig2.the structure of BCI system5精选Signal Acquisition:to measure EEG from scalp(non-invasive)or brain surface(invasive);Signal recording,amplification,digitization;Pre-processing:to improve signal-to-noise ratio;to improve signal-to-interference ratioFeature extraction/selection:to reduce dimension;to find best projection direction Translation algorithm:feature=command6精选ApplicationspFor disabled peopleCommunications ControlNeural prothesesNeural rehabilitationpFor ordinary peopleControl in special environmentBCI gameLie detection based on EEG/fMRI7精选Future WorkpImproving physical methods for gathering EEGspImproving generalizationpImproving knowledge of how to interpret waves(not just the“new phrenology”)8精选Thankyouforyourattention9精选