Affiliations: [a] Department of Electronics and Communication Engineering, Sri Shanmugha College of Engineering and Technology, Sankari, Tamilnadu, India
| [b] Department of Electrical and Electronics Engineering, Paavai College of Engineering, Namakkal, Tamilnadu, India
Correspondence:
[*]
Corresponding author. Sudarsan Prabhakaran, Department of Electronics and Communication Engineering, Sri Shanmugha College of Engineering and Technology, Sankari, Tamilnadu, India. E-mail: [email protected].
Abstract: This manuscript proposes an automated artifacts detection and multimodal classification system for human emotion analysis from human physiological signals. First, multimodal physiological data, including the Electrodermal Activity (EDA), electrocardiogram (ECG), Blood Volume Pulse (BVP) and respiration rate signals are collected. Second, a Modified Compressed Sensing-based Decomposition (MCSD) is used to extract the informative Skin Conductance Response (SCR) events of the EDA signal. Third, raw features (edge and sharp variations), statistical and wavelet coefficient features of EDA, ECG, BVP, respiration and SCR signals are obtained. Fourth, the extracted raw features, statistical and wavelet coefficient features from all physiological signals are fed into the parallel Deep Convolutional Neural Network (DCNN) to reduce the dimensionality of feature space by removing artifacts. Fifth, the fused artifact-free feature vector is obtained for neutral, stress and pleasure emotion classes. Sixth, an artifact-free feature vector is used to train the Random Forest Deep Neural Network (RFDNN) classifier. Then, a trained RFDNN classifier is applied to classify the test signals into different emotion classes. Thus, leveraging the strengths of both RF and DNN algorithms, more comprehensive feature learning using multimodal psychological data is achieved, resulting in robust and accurate classification of human emotional activities. Finally, an extensive experiment using the Wearable Stress and Affect Detection (WESAD) dataset shows that the proposed system outperforms other existing human emotion classification systems using physiological data.
Keywords: Emotional reactivity, physiological
signals, modified compressed sensing, motion artifacts, deep convolutional neural network, random forest deep neural
network
