How a Virtual Agent Should Smile? - Morphological and Dynamic Characteristics of Virtual Agent's Smiles

13 years 3 months ago

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A smile may communicate diﬀerent meanings depending on subtle characteristics of the facial expression. In this article, we have studied the morphological and dynamic characteristics of amused, polite, and embarrassed smiles displayed by a virtual agent. A web application has been developed to collect virtual agent’s smile descriptions corpus directly constructed by users. Based on the corpora and using a decision tree classiﬁcation technique, we propose an algorithm to determine the characteristics of each type of the smile that a virtual agent may express. The proposed algorithm enables one to generate a variety of facial expressions corresponding to the polite, embarrassed, and amused smiles. Key words: Smile, Embodied Conversational Agent (ECA), Facial Expression, Decision Tree

Magalie Ochs, Radoslaw Niewiadomski, Catherine Pel

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