A multi-command SSVEP-based BCI system based on single flickering frequency half-field steady-state visual stimulation.
Steady-state visual evoked potentials (SSVEPs) are widely employed in brain-computer interface (BCI) applications, especially to control machines. However, the use of SSVEPs leads to eye fatigue and causes lower accuracy over the long term, particularly when multi-commands are required. Therefore, t...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 55; no. 6; pp. 965 - 978 |
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| Autores principales: | , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jun2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=123190304&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 123190304 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Jun2017 vid: 55 iid: 6 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 123190304 123190304 143960062 NLM27651060 10.1007/s11517-016-1560-3 NLM27651060 123190304 ppf: 965 ppct: 13 formats: fmt: @attributes: type: P tig: atl: A multi-command SSVEP-based BCI system based on single flickering frequency half-field steady-state visual stimulation. aug: au: Punsawad, Yunyong Wongsawat, Yodchanan affil: Department of Biomedical Engineering, Faculty of Engineering , Mahidol University , Nakornpathom 73170 Thailand sug: subj: Brain Physiology Evoked Potentials, Visual Physiology Electroencephalography Methods Adult Algorithms Young Adult Male Research Subjects Female Physical Stimulation Methods Brain-Computer Interfaces Adult: 19-44 years Male Female ab: Steady-state visual evoked potentials (SSVEPs) are widely employed in brain-computer interface (BCI) applications, especially to control machines. However, the use of SSVEPs leads to eye fatigue and causes lower accuracy over the long term, particularly when multi-commands are required. Therefore, this paper proposes a half-field steady-state visual stimulation pattern and paradigm to increase the limited number of commands that can be achieved with existing SSVEP-based BCI methods. Following the theory of vision perception and existing half-field SSVEP-based BCI systems, the new stimulation pattern generates four commands using only one frequency flickering stimulus and has an average classification accuracy of approximately 75 %. According to the proposed stimulus pattern, using only one frequency without requiring users to stare directly at the flickering stimulus allows users to easily focus on the system and experience less visual fatigue compared to existing systems. Furthermore, new half-field SSVEP-based BCI systems are proposed, incorporating our proposed feature extraction and decision-making algorithm. Extracting the signal from the occipital area and using a reference electrode position at the parietal area yielded better results compared to the central area. In addition, we recommend using an LED or LCD as the visual stimulus device (at the recommended size), which yielded comparable results to our proposed feature extraction and decision-making algorithm. Finally, an application of the proposed system is demonstrated for real-time television control. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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