Investigation of Visual Stimulus Signals Using Hue Change for SSVEP
This study focuses on the problem of eye irritation when measuring steady-state visual evoked potentials (SSVEPs) using a brain–computer interface and aims to clarify experimentally visual stimulus signals that do not cause discomfort to users. To this end, a method is proposed that introduces a fla...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/3/1045 |
| _version_ | 1797407904276414464 |
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| author | Yoshihiro Sato Yuichiro Kitamura Takamichi Hirata Yue Bao |
| author_facet | Yoshihiro Sato Yuichiro Kitamura Takamichi Hirata Yue Bao |
| author_sort | Yoshihiro Sato |
| collection | DOAJ |
| description | This study focuses on the problem of eye irritation when measuring steady-state visual evoked potentials (SSVEPs) using a brain–computer interface and aims to clarify experimentally visual stimulus signals that do not cause discomfort to users. To this end, a method is proposed that introduces a flash stimulus in which the color is changed by changing its hue. This reduces the change in brightness while providing a color change, thereby facilitating visual stimulation with less discomfort. In experiments conducted, flash stimuli of the primary colors red, green, and blue and colors with different hues of 5–45° from these primary colors were generated to investigate the algorithm accuracy of SSVEP and discomfort. Subjective questionnaire and CFF values, which are ophthalmic parameters, were obtained for the subjects and compared to the discrimination rate. As a result of the comparison, it was confirmed that the fatigue level of the visual stimulus generated by the proposed hue change was lower than that of the conventional black-and-white stimulus. It was also confirmed that the combination of the hue difference and frequency could obtain the same discrimination rate as the conventional method. |
| first_indexed | 2024-03-09T03:48:28Z |
| format | Article |
| id | doaj.art-7207eabfaa284b6c8c1a63be77172830 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T03:48:28Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-7207eabfaa284b6c8c1a63be771728302023-12-03T14:30:39ZengMDPI AGApplied Sciences2076-34172021-01-01113104510.3390/app11031045Investigation of Visual Stimulus Signals Using Hue Change for SSVEPYoshihiro Sato0Yuichiro Kitamura1Takamichi Hirata2Yue Bao3Division of Informatics, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanDepartment of Computer Science, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanDepartment of Medical Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanDepartment of Computer Science, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557, JapanThis study focuses on the problem of eye irritation when measuring steady-state visual evoked potentials (SSVEPs) using a brain–computer interface and aims to clarify experimentally visual stimulus signals that do not cause discomfort to users. To this end, a method is proposed that introduces a flash stimulus in which the color is changed by changing its hue. This reduces the change in brightness while providing a color change, thereby facilitating visual stimulation with less discomfort. In experiments conducted, flash stimuli of the primary colors red, green, and blue and colors with different hues of 5–45° from these primary colors were generated to investigate the algorithm accuracy of SSVEP and discomfort. Subjective questionnaire and CFF values, which are ophthalmic parameters, were obtained for the subjects and compared to the discrimination rate. As a result of the comparison, it was confirmed that the fatigue level of the visual stimulus generated by the proposed hue change was lower than that of the conventional black-and-white stimulus. It was also confirmed that the combination of the hue difference and frequency could obtain the same discrimination rate as the conventional method.https://www.mdpi.com/2076-3417/11/3/1045brain–computer interfaceelectroencephalogramanalogous colorssteady-state visual evoked potentialcanonical correlation analysis |
| spellingShingle | Yoshihiro Sato Yuichiro Kitamura Takamichi Hirata Yue Bao Investigation of Visual Stimulus Signals Using Hue Change for SSVEP Applied Sciences brain–computer interface electroencephalogram analogous colors steady-state visual evoked potential canonical correlation analysis |
| title | Investigation of Visual Stimulus Signals Using Hue Change for SSVEP |
| title_full | Investigation of Visual Stimulus Signals Using Hue Change for SSVEP |
| title_fullStr | Investigation of Visual Stimulus Signals Using Hue Change for SSVEP |
| title_full_unstemmed | Investigation of Visual Stimulus Signals Using Hue Change for SSVEP |
| title_short | Investigation of Visual Stimulus Signals Using Hue Change for SSVEP |
| title_sort | investigation of visual stimulus signals using hue change for ssvep |
| topic | brain–computer interface electroencephalogram analogous colors steady-state visual evoked potential canonical correlation analysis |
| url | https://www.mdpi.com/2076-3417/11/3/1045 |
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