Abstract

This paper proposes the use of time-frequency and wavelet transform features for emotion recognition via EEG signals. The proposed experiment has been carefully designed with EEG electrodes placed at FP1 and FP2 and using images provided by the Affective Picture System (IAP), which was developed by the University of Florida. A total of two time-domain features, two frequen-cy-domain features, as well as discrete wavelet transform coefficients have been studied using Artificial Neural Network (ANN) as the classifier, and the best combination of these features has been determined. Using the data collected, the best detection accuracy achievable by the proposed schemed is about 81.8%.

Highlights

  • EEG carries important information on the responses to stimuli in the human brain

  • This paper proposes the use of time-frequency and wavelet transform features for emotion recognition via EEG signals

  • The proposed experiment has been carefully designed with EEG electrodes placed at FP1 and FP2 and using images provided by the Affective Picture System (IAP), which was developed by the University of Florida

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Summary

Introduction

EEG carries important information on the responses to stimuli in the human brain. By studying the pattern of the brain signal waveforms, we can identify the types of emotion up to a certain level of accuracy. An emotion recognition system can help in understanding the cognitive functions of the brain. It can enable the command and control of machines such as the cursor of a computer, wheelchairs, or a robotic arm. ANN classifier has been used to classify brain signals of subjects engaging in mental tasks [4]. Another classifier that has been used to classify emotions is the Fuzzy C Means (FCM) Clustering [5]. A new combination of features have been proposed and the ANN classifier has been used to further improve the emotion classification accuracy.

Test Subjects
The Experiment
Pre-Processing
Emotion Recognition—Features Extraction
Frequency Domain Analysis
Wavelet Transform Domain Analysis
Emotion Recognition—Classification
Results and Discussions
Conclusions
Full Text
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