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A P300 based online brain-computer interface system for virtual hand control |
Wei-dong Chen1,2, Jian-hui Zhang1,2, Ji-cai Zhang1,2, Yi Li1,2, Yu Qi1,2, Yu Su1,2, Bian Wu1,3, Shao-min Zhang1,3, Jian-hua Dai1,2, Xiao-xiang Zheng*,1,3, Dong-rong Xu1,4,5 |
1 Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
2 School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China
3 Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China
4 MRI Unit, Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
5 New York State Psychiatric Institute, New York, NY 10032, USA
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Abstract Brain-computer interface (BCI) is a communication system that can help lock-in patients to interact with the outside environment by translating brain signals into machine commands. The present work provides a design for a virtual reality (VR) based BCI system that allows human participants to control a virtual hand to make gestures by P300 signals, with a positive peak of potential about 300 ms posterior to the onset of target stimulus. In this virtual environment, the participants can obtain a more immersed experience with the BCI system, such as controlling a virtual hand or walking around in the virtual world. Methods of modeling the virtual hand and analyzing the P300 signals are also described in detail. Template matching and support vector machine were used as the P300 classifier and the experiment results showed that both algorithms perform well in the system. After a short time of practice, most participants could learn to control the virtual hand during the online experiment with greater than 70% accuracy.
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Received: 25 August 2009
Published: 02 August 2010
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Fund: Project supported by the National Natural Science Foundation of China (No. 60873125), the National Institute of Biomedical Imaging
and Bioengineering (No. 1R03EB008235-01A1), the Shanghai Commission of Science and Technology (No. 10440710200), and the
Fundamental Research Funds for the Central Universities |
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Cite this article:
Wei-dong Chen, Jian-hui Zhang, Ji-cai Zhang, Yi Li, Yu Qi, Yu Su, Bian Wu, Shao-min Zhang, Jian-hua Dai, Xiao-xiang Zheng, Dong-rong Xu. A P300 based online brain-computer interface system for virtual hand control. Front. Inform. Technol. Electron. Eng., 2010, 11(8): 587-597.
URL:
http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C0910530 OR http://www.zjujournals.com/xueshu/fitee/Y2010/V11/I8/587
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A P300 based online brain-computer interface system for virtual hand control
Brain-computer interface (BCI) is a communication system that can help lock-in patients to interact with the outside environment by translating brain signals into machine commands. The present work provides a design for a virtual reality (VR) based BCI system that allows human participants to control a virtual hand to make gestures by P300 signals, with a positive peak of potential about 300 ms posterior to the onset of target stimulus. In this virtual environment, the participants can obtain a more immersed experience with the BCI system, such as controlling a virtual hand or walking around in the virtual world. Methods of modeling the virtual hand and analyzing the P300 signals are also described in detail. Template matching and support vector machine were used as the P300 classifier and the experiment results showed that both algorithms perform well in the system. After a short time of practice, most participants could learn to control the virtual hand during the online experiment with greater than 70% accuracy.
关键词:
Brain-computer interface (BCI),
Electroencephalography (EEG),
P300,
Virtual reality (VR),
Template matching,
Support vector machine (SVM)
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