Journal
NEUROCOMPUTING
Volume 272, Issue -, Pages 668-676Publisher
ELSEVIER
DOI: 10.1016/j.neucom.2017.08.015
Keywords
Emotion recognition; Stationary wavelet entropy; Jaya algorithm; Facial expression; Affective computing; Single hidden layer; Optimal wavelet; Optimal decomposition level; Feedforward neural network
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Funding
- Program of Natural Science Research of Jiangsu Higher Education Institutions [16KJB520025, 15KJB470010]
- Natural Science Foundation of Jiangsu Province [BK20150983]
- Natural Science Foundation of China [61602250]
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Aim: Emotion recognition based on facial expression is an important field in affective computing. Current emotion recognition systems may suffer from two shortcomings: translation in facial image may deteriorate the recognition performance, and the classifier is not robust. Method: To solve above two problems, our team proposed a novel intelligent emotion recognition system. Our method used stationary wavelet entropy to extract features, and employed a single hidden layer feedforward neural network as the classifier. To prevent the training of the classifier fall into local optimum points, we introduced the Jaya algorithm. Results: The simulation results over a 20-subject 700-image dataset showed our algorithm reached an overall accuracy of 96.80 +/- 0.14%. Conclusion: This proposed approach performs better than five state-of-the-art approaches in terms of overall accuracy. Besides, the db4 wavelet performs the best among other whole db wavelet family. The 4-level wavelet decomposition is superior to other levels. In the future, we shall test other advanced features and training algorithms. (C) 2017 Elsevier B.V. All rights reserved.
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