Boosting Coded Dynamic Features for Facial Action Units and Facial Expression Recognition

It is well known that how to extract dynamical features is a key issue for video based face analysis. In this paper, we present a novel approach of facial action units (AU) and expression recognition based on coded dynamical features. In order to capture the dynamical characteristics of facial events, we design the dynamical haar-like features to represent the temporal variations of facial events. Inspired by the binary pattern coding, we further encode the dynamic haar-like features into binary pattern features, which are useful to construct weak classifiers for boosting learning. Finally the Adaboost is performed to learn a set of discriminating coded dynamic features for facial active units and expression recognition. Experiments on the CMU expression database and our own facial AU database show its encouraging performance.

• Type: Conference
• Year: 2007
• Where: CVPR
• Authors: Peng Yang, Qingshan Liu, Dimitris N. Metaxas
• Keywords: Computer Vision, CVPR 2007, Dynamical Features, Dynamical Haar-like Features, Facial Action Units, Facial Active Units, Facial Au Database