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    Fully automatic 3D facial expression recognition using local depth features

    Access Status
    Fulltext not available
    Authors
    Xue, Mingliang
    Mian, A.
    Liu, Wan-Quan
    Li, Ling
    Date
    2014
    Type
    Conference Paper
    
    Metadata
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    Citation
    Xue, M. and Mian, A. and Liu, W. and Li, L. 2014. Fully automatic 3D facial expression recognition using local depth features, in IEEE Winter Conference on Applications of Computer Vision, Mar 24-26 2014, pp. 1096-1103. Steamboat Springs, CO, USA: Institute of Electrical and Electronics Engineers.
    Source Title
    2014 IEEE Winter Conference on Applications of Computer Vision (WACV),
    Source Conference
    WACV 2014: IEEE Winter Conference on Applications of Computer Vision
    DOI
    10.1109/WACV.2014.6835736
    School
    Department of Computing
    URI
    http://hdl.handle.net/20.500.11937/45568
    Collection
    • Curtin Research Publications
    Abstract

    Facial expressions form a significant part of our nonverbal communications and understanding them is essential for effective human computer interaction. Due to the diversity of facial geometry and expressions, automatic expression recognition is a challenging task. This paper deals with the problem of person-independent facial expression recognition from a single 3D scan. We consider only the 3D shape because facial expressions are mostly encoded in facial geometry deformations rather than textures. Unlike the majority of existing works, our method is fully automatic including the detection of landmarks. We detect the four eye corners and nose tip in real time on the depth image and its gradients using Haar-like features and AdaBoost classifier. From these five points, another 25 heuristic points are defined to extract local depth features for representing facial expressions. The depth features are projected to a lower dimensional linear subspace where feature selection is performed by maximizing their relevance and minimizing their redundancy. The selected features are then used to train a multi-class SVM for the final classification. Experiments on the benchmark BU-3DFE database show that the proposed method outperforms existing automatic techniques, and is comparable even to the approaches using manual landmarks.

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