Universiti Teknologi Malaysia Institutional Repository

Facial neuromuscular signal classification by means of least square support vector machine for MuCI

Hamedi, Mahyar and Salleh, Sh-Hussain and Mohd. Noor, Alias (2015) Facial neuromuscular signal classification by means of least square support vector machine for MuCI. Applied Soft Computing Journal, 30 . pp. 83-93. ISSN 1568-4946

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Official URL: http://dx.doi.org/10.1016/j.asoc.2015.01.034


Facial neuromuscular signal has recently drawn the researchers' attention to its outstanding potential as an efficient medium for Muscle Computer Interface (MuCI) applications. The proper analysis of such electromyogram (EMG) signals is essential in designing the interfaces. In this article, a multiclass least-square support vector machine (LS-SVM) is proposed for classification of different facial gestures EMG signals. EMG signals were captured through three bi-polar electrodes from ten participants while gesturing ten different facial states. EMGs were filtered and segmented into non-overlapped windows from which root mean square (RMS) features were extracted and then fed to the classifier. For the purpose of classification, different models of LS-SVM were constructed while tuning the kernel parameters automatically and manually. In the automatic mode, 48 models were formed while parameters of linear and radial basis function (RBF) kernels were tuned using different optimization techniques, cost functions and encoding schemes. In the manual mode, 8 models were shaped by means of the considered kernel functions and encoding schemes. In order to find the best model with a reliable performance, constructed models were evaluated and compared in terms of classification accuracy and computational cost. Results reported that the model including RBF kernel which was tuned manually and encoded by one-versus-all scheme provided the highest classification accuracy (93.10%) and consumed 0.98 s for training. It was indicated that automatic models were outperformed since they required too much time for tuning the parameters without any meaningful improvement in the final classification accuracy. The robustness of the selected LS-SVM model was evaluated through comparison with Support Vector Machine, fuzzy C-Means and uzzy Gath-Geva clustering techniques

Item Type:Article
Uncontrolled Keywords:classification, electromyogram, facial gesture recognition
Subjects:R Medicine > R Medicine (General)
Divisions:Biosciences and Medical Engineering
ID Code:55248
Deposited By: Fazli Masari
Deposited On:17 Aug 2016 05:09
Last Modified:15 Feb 2017 07:18

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