Features classification using support vector machine for a facial expression recognition system

Rajesh A. Patil; Vineet Sahula

doi:10.1117/1.JEI.21.4.043003

1 October 2012 Features classification using support vector machine for a facial expression recognition system

Rajesh A. Patil, Vineet Sahula

Author Affiliations +

Journal of Electronic Imaging, Vol. 21, Issue 4, 043003 (October 2012). https://doi.org/10.1117/1.JEI.21.4.043003

Abstract

A methodology for automatic facial expression recognition in image sequences is proposed, which makes use of the Candide wire frame model and an active appearance algorithm for tracking, and support vector machine (SVM) for classification. A face is detected automatically from the given image sequence and by adapting the Candide wire frame model properly on the first frame of face image sequence, facial features in the subsequent frames are tracked using an active appearance algorithm. The algorithm adapts the Candide wire frame model to the face in each of the frames and then automatically tracks the grid in consecutive video frames over time. We require that first frame of the image sequence corresponds to the neutral facial expression, while the last frame of the image sequence corresponds to greatest intensity of facial expression. The geometrical displacement of Candide wire frame nodes, defined as the difference of the node coordinates between the first and the greatest facial expression intensity frame, is used as an input to the SVM, which classify the facial expression into one of the classes viz happy, surprise, sadness, anger, disgust, and fear.

Citation Download Citation

Rajesh A. Patil and Vineet Sahula "Features classification using support vector machine for a facial expression recognition system," Journal of Electronic Imaging 21(4), 043003 (1 October 2012). https://doi.org/10.1117/1.JEI.21.4.043003

Published: 1 October 2012

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