Momose K
Faculty of Human Sciences, Waseda University, Tokorozawa, Saitama, 359-1192 Japan.
Annu Int Conf IEEE Eng Med Biol Soc. 2007;2007:5063-6. doi: 10.1109/IEMBS.2007.4353478.
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.
研究了一种利用伪随机刺激诱发的视觉诱发电位（VEP）来检测眼睛注视点的方法。建立并评估了一个有望成为实用脑机接口的原型系统。基于5.11秒的四个不同伪随机二进制序列（PRBS）的四个亮度调制红色字符同时显示在显示器上，计算VEP与每个PRBS的互相关函数（核），并用于确定受试者注视的目标。在一项针对视力正常受试者的实验中，在7秒内从VEP获得了他们注视的目标，检测的平均错误率为22%。结果表明，该技术作为一种实用的脑机接口系统可能是有用的。
