Evaluation of an eye gaze point detection method using VEP elicited by multi-pseudorandom stimulation for brain computer interface
Evaluation of an eye gaze point detection method using VEP elicited by multi-pseudorandom stimulation for brain computer interface
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DOI：
10.1109/iembs.2007.4353478
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发表时间：
2007-10
期刊：
影响因子：
--
通讯作者：
Keiko Momose
中科院分区：
文献类型：
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作者：
Keiko Momose
研究了一种利用伪随机刺激诱发的视觉诱发电位（VEP）检测注视点的方法。建立了一个实用的脑机接口原型系统，并对其进行了评价。基于4个不同的伪随机二进制序列（PRBS）的4个亮度调制的红色字符同时出现在显示器上，并计算VEP和每个PRBS的互相关函数（核），并用于确定受试者的注视目标。在一个实验中，与正常视力的受试者，他们注视的目标是在7秒内获得的VEP，检测的平均错误率为22%。结果表明，该技术可作为一种实用的脑机接口系统。
A method for detecting eye gaze point using visual evoked potentials (VEPs) elicited by pseudorandom stimuli was examined. Prototype system which would be a practical brain computer interface is established and evaluated. Four luminance modulated red characters based on four different pseudorandom binary sequences (PRBS) of 5.11 seconds were simultaneously presented on a monitor, and the cross correlation functions (kernels) of VEPs and each PRBS were calculated and used to determine the subject's gazed target. In an experiment with subjects with normal vision, their gazed target was obtained from VEPs within 7 seconds, and the mean error rate of detection was 22%. Results indicated that this technique could be useful as a practical brain computer interface system.