基于DirectShow的脑机接口图像视觉刺激器  

Images Visual Stimulator for Brain-Computer Interface Based on DirectShow

作　　者：石锐[1] 何相锦[1] 何庆华[2] 

机构地区：[1]重庆大学计算机学院,重庆400044 [2]第三军医大学大坪医院野战外科研究所,重庆400042

出　　处：《计算机技术与发展》2010年第12期197-200,共4页Computer Technology and Development

基　　金：重庆市科技攻关计划项目(CSTC;2009AC5023)

摘　　要：视觉刺激器是刺激脑电信号的重要方式。为了满足想象左右手运动的脑机接口系统的特定需求,为其提供人机交互界面,采用了DirectShow、多线程和并口通信技术,在DirectShow中自定义过滤器,设计并实现了基于DirectShow的实时图像视觉刺激器。系统的开发工具是VC++,运行环境是Windows,脑机接口的数据采集仪器为Biosemi公司生产的Active One多道生理信号采集系统。最后通过脑机接口实验证明:能在满足时间精度要求的前提下,完成图像刺激的控制、并口通信等功能,为想象运动脑电的效果提供了很好的保证。Visual stimulator is an important way to stimulate the brain signals.In order to meet the specific needs of brain-computer interface system for imaging left-right hands movement and provide human-computer interface for it,used DirectShow, multi-threading and parallel port communication,realized a self-defining filter in DirectShow,designed and implemented a real-time image visual stimulator based on DirectShow.The development tool of this system is VC＋＋,operating environment is Windows,data acquisition instrumentation for brain-computer interface is＂Active One＂multi-channel physiological signal acquisition system produced by Biosemi.Finally the brain-computer interface experiments proved that it completed the functions such as image stimulus control,parallel port communication and so on,satisfied the requirement of time accuracy,provided a good guarantee for the effect of EEG based imaging movement.

关 键 词：视觉刺激器 脑机接口 DIRECTSHOW 并口通信 自定义过滤器 时间精度 

分 类 号：TP37[自动化与计算机技术—计算机系统结构] R318.04[自动化与计算机技术—计算机科学与技术]