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        Discriminating angry, happy and neutral facial expression : a comparison of computational models

        Author
        Shenoy, A.
        Anthony, S.
        Frank, R.
        Davey, N.
        Attention
        2299/9621
        Abstract
        Recognizing expressions are a key part of human social interaction, and processing of facial expression information is largely automatic for humans, but it is a non-trivial task for a computational system. The purpose of this work is to develop computational models capable of differentiating between a range of human facial expressions. Raw face images are examples of high dimensional data, so here we use two dimensionality reduction techniques: Principal Component Analysis and Curvilinear Component Analysis. We also preprocess the images with a bank of Gabor filters, so that important features in the face images are identified. Subsequently the faces are classified using a Support Vector Machine. We show that it is possible to differentiate faces with a neutral expression from those with a happy expression and neutral expression from those of angry expressions and neutral expression with better accuracy. Moreover we can achieve this with data that has been massively reduced in size: in the best case the original images are reduced to just 5 components with happy faces and 5 components with angry faces.
        Publication date
        2009
        Published in
        Communications in Computer and Information Science
        Published version
        https://doi.org/10.1007/978-3-642-03969-0_19
        Other links
        http://hdl.handle.net/2299/9621
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