Subtly different facial expression recognition and expression intensity estimation Export

@proceedings{lien98, abstract = {We have developed a computer vision system, including both facial feature extraction and recognition, that automatically discriminates among subtly different facial expressions. Expression classification is based on Facial Action Coding System (FACS) action units (AUs), and discrimination is performed using Hidden Markov Models (HMMs). Three methods are developed to extract facial expression information for automatic recognition. The first method is facial feature point tracking using a coarse-to-fine pyramid method. This method is sensitive to subtle feature motion and is capable of handling large displacements with sub-pixel accuracy. The second method is dense flow tracking together with principal component analysis (PCA) where the entire facial motion information per frame is compressed to a low-dimensional weight vector. The third method is high gradient component (i.e., furrow) analysis in the spatio-temporal domain, which exploits the transient variation associated with the facial expression. Upon extraction of the facial information, non-rigid facial expression is separated from the rigid head motion component, and the face images are automatically aligned and normalized using an affine transformation. This system also provides expression intensity estimation, which has significant effect on the actual meaning of the expression}, author = {Lien, J. J. J. and Kanade, T. and Cohn, J. F. and Li, Ching-Chung}, booktitle = {Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition}, citeulike-article-id = {4376378}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/CVPR.1998.698704}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=698704}, doi = {10.1109/CVPR.1998.698704}, journal = {Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition}, keywords = {face}, pages = {853--859}, posted-at = {2009-04-22 21:17:05}, priority = {2}, title = {Subtly different facial expression recognition and expression intensity estimation}, url = {http://dx.doi.org/10.1109/CVPR.1998.698704}, year = {1998} }

TY - CONF ID - lien98 L3 - citeulike-article-id:4376378 N2 - We have developed a computer vision system, including both facial feature extraction and recognition, that automatically discriminates among subtly different facial expressions. Expression classification is based on Facial Action Coding System (FACS) action units (AUs), and discrimination is performed using Hidden Markov Models (HMMs). Three methods are developed to extract facial expression information for automatic recognition. The first method is facial feature point tracking using a coarse-to-fine pyramid method. This method is sensitive to subtle feature motion and is capable of handling large displacements with sub-pixel accuracy. The second method is dense flow tracking together with principal component analysis (PCA) where the entire facial motion information per frame is compressed to a low-dimensional weight vector. The third method is high gradient component (i.e., furrow) analysis in the spatio-temporal domain, which exploits the transient variation associated with the facial expression. Upon extraction of the facial information, non-rigid facial expression is separated from the rigid head motion component, and the face images are automatically aligned and normalized using an affine transformation. This system also provides expression intensity estimation, which has significant effect on the actual meaning of the expression JF - Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition EP - 859 TI - Subtly different facial expression recognition and expression intensity estimation T2 - Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition SP - 853 KW - face AU - Lien, JJJ AU - Kanade, T AU - Cohn, JF AU - Li, Ching-Chung PY - 1998/// UR - http://dx.doi.org/10.1109/CVPR.1998.698704 ER -