Abstract—The study of the interaction between humans and computers has been emerging during the last few years. This interaction will be more powerful if computers are able to perceive and respond to human nonverbal communication such as emotions. In this study, we present the image-based approach to emotion classification through lower facial expression. We employ a set of feature points in the lower face image according to the particular face model used and consider their motion across each emotive expression of images. The vector of displacements of all feature points input to the Adaptive Support Vector Machines (A-SVMs) classifier that classify it into seven basic emotions scheme, namely neutral, angry, disgust, fear, happy, sad and surprise. The system was tested on the Japanese Female Facial Expression (JAFFE) dataset of frontal view facial expressions [7]. Our experiments on emotion classification through lower facial expressions demonstrate the robustness of Adaptive SVM classifier and verify the high efficiency of our approach.

Index Terms—Emotion classification, facial expression, adaptive support vector machines, facial expression classifier.

P. Visutsak is with the Computer Science Department, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand(e-mail: faaspwv@ku.ac.th).

Cite: P. Visutsak, "Emotion Classification Using Adaptive SVMs," International Journal of Computer and Communication Engineering vol. 1, no. 3, pp. 279-282 , 2012.