脑机接口ppt

,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2015/1/15,#,单击此处编辑母版标题样式,Reporter:,Number:,Brain-Computer Interface,CONTENTS,Introduction,Theory,Applications,Future Work,what is BCI ?,A,braincomputer interface,(,BCI,), often called a,mind-machine interface,(,MMI,), or sometimes called a,brainmachine interface,(,BMI,), is a direct communication pathway between the brain and an external device.,INTRODUCTION,.,EEG,An,electroencephalogram,is a measure of the brains voltage fluctuations as detected from scalp electrodes.,It is an approximation,of the cumulative electrical,activity of neurons.,fig1. electroencephalogram,theory,fig2.the structure of BCI system,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 ratio,Feature extraction/selection,:,to reduce dimension; to find best projection direction,Translation algorithm,:,feature = command,Applications,For disabled people,Communications,Control,Neural protheses,Neural rehabilitation,For ordinary people,Control in special environment,BCI game,Lie detection based on EEG/fMRI,Future Work,Improving physical methods for gathering EEGs,Improving generalization,Improving knowledge of how to interpret waves (not just the “new phrenology”),Thank you for your attention,