AUTHOR=Val-Calvo Mikel , Álvarez-Sánchez José R. , Ferrández-Vicente Jose M. , Fernández Eduardo TITLE=Optimization of Real-Time EEG Artifact Removal and Emotion Estimation for Human-Robot Interaction Applications JOURNAL=Frontiers in Computational Neuroscience VOLUME=13 YEAR=2019 URL=https://www.frontiersin.org/journals/computational-neuroscience/articles/10.3389/fncom.2019.00080 DOI=10.3389/fncom.2019.00080 ISSN=1662-5188 ABSTRACT=

Affective human-robot interaction requires lightweight software and cheap wearable devices that could further this field. However, the estimation of emotions in real-time poses a problem that has not yet been optimized. An optimization is proposed for the emotion estimation methodology including artifact removal, feature extraction, feature smoothing, and brain pattern classification. The challenge of filtering artifacts and extracting features, while reducing processing time and maintaining high accuracy results, is attempted in this work. First, two different approaches for real-time electro-oculographic artifact removal techniques are tested and compared in terms of loss of information and processing time. Second, an emotion estimation methodology is proposed based on a set of stable and meaningful features, a carefully chosen set of electrodes, and the smoothing of the feature space. The methodology has proved to perform on real-time constraints while maintaining high accuracy on emotion estimation on the SEED database, both under subject dependent and subject independent paradigms, to test the methodology on a discrete emotional model with three affective states.