enhancing classification performance of functional near-infrared spectroscopy- brain–computer interface using adaptive estimation of general linear model coefficients
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2017
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Abstract
In this paper, a novel methodology for enhanced classification of functional near-infrared spectroscopy (fNIRS) signals utilizable in a two-class [motor imagery (MI) and rest; mental rotation (MR) and rest] brain–computer interface (BCI) is presented. First, fNIRS signals corresponding to MI and MR are acquired from the motor and prefrontal cortex, respectively, afterward, filtered to remove physiological noises. Then, the signals are modeled using the general linear model, the coefficients of which are adaptively estimated using the least squares technique. Subsequently, multiple feature combinations of estimated coefficients were used for classification. The best classification accuracies achieved for five subjects, for MI versus rest are 79.5, 83.7, 82.6, 81.4, and 84.1% whereas those for MR versus rest are 85.5, 85.2, 87.8, 83.7, and 84.8%, respectively, using support vector machine. These results are compared with the best classification accuracies obtained using the conventional hemodynamic response. By means of the proposed methodology, the average classification accuracy obtained was significantly higher (p < 0.05). These results serve to demonstrate the feasibility of developing a high-classification-performance fNIRS-BCI.
| Reference Key |
qureshi2017frontiersenhancing
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|---|---|
| Authors | ;Nauman Khalid Qureshi;Noman Naseer;Farzan Majeed Noori;Farzan Majeed Noori;Hammad Nazeer;Rayyan Azam Khan;Sajid Saleem |
| Journal | industrial \& engineering chemistry research |
| Year | 2017 |
| DOI |
10.3389/fnbot.2017.00033
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