A survey on facial expression recognition in 3D video sequences

Facial expression recognition constitutes an active research area due to its various applications. This survey addresses methodologies for 3 D mesh video facial expression recognition. Recognition is, actually, a special case of intra-class retrieval. The approaches are analyzed and compared in detail. They are primarily categorized according to the 3 D dynamic face analysis technique used. In addition, currently available datasets, used for 3 D video facial expression analysis, are presented. Finally, future challenges that can be addressed in order for 3 D video facial expression recognition field to be further improved, are extensively discussed.