Combination of Fisher scores and appearance based features for face recognition

A novel feature generation scheme which combines multiclass mapping of Fisher scores and appearance based features for face recognition (FR) is proposed in this paper. Multi-class mapping of Fisher scores is based on partial derivative analysis of parameters of hidden Markov model (HMM), and appearance based features are obtained directed from face images. Linear discriminant analysis (LDA) is used to analyze the feature vectors generated under this scheme. Recognition performance improvement is observed over stand-alone HMM method as well as Fisherface method, which also uses appearance based feature vectors. Moreover, by reducing the number of models involved in the training and testing stages, the proposed feature generation scheme can maintain very high discriminative power at much lower computational complexity comparing to that of the traditional HMM based FR system. Experimental results are provided to demonstrate the viability of this scheme for face recognition.

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