Discriminant analysis of the two-dimensional Gabor features for face recognition

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Discriminant analysis of the two-dimensional Gabor features for face recognition

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A new technique called two-dimensional Gabor Fisher discriminant (2DGFD) is derived and implemented for image representation and recognition. In this approach, the Gabor wavelets are used to extract facial features. The principal component analysis (PCA) is applied directly on the Gabor transformed matrices to remove redundant information from the image rows and a new direct two-dimensional Fisher linear discriminant (direct 2DFLD) method is derived in order to further remove redundant information and form a discriminant representation more suitable for face recognition. The conventional Gabor-based methods transform the Gabor images into a high-dimensional feature vector. However, these methods lead to high computational complexity and memory requirements. Furthermore, it is difficult to analyse such high-dimensional data accurately. The novel 2DGFD method was tested on face recognition using the ORL, Yale and extended Yale databases, where the images vary in illumination, expression, pose and scale. In particular, the 2DGFD method achieves 98.0% face recognition accuracy when using 20×3 feature matrices for each Gabor output on the ORL database and 97.6% recognition accuracy compared with 91.8% and 91.6% for the 2DPCA and 2DFLD method on the extended Yale database. The results show that the proposed 2DGFD method is computationally more efficient than the Gabor Fisher classifier method by approximately 8 times on the ORL, 135 times on the Yale and 1.2801×108 times on the extended Yale B data sets.

Inspec keywords: matrix algebra; image representation; computational complexity; face recognition; principal component analysis; wavelet transforms; feature extraction

Other keywords: Yale databases; computational complexity; Gabor transformed matrices; 2D Fisher linear discriminant; image representation; face recognition; principal component analysis; Gabor wavelets; facial features extraction; ORL databases; image recognition; Gabor Fisher classifier method; Gabor Fisher discriminant analysis

Subjects: Image recognition; Other topics in statistics; Algebra; Other topics in statistics; Image recognition; Integral transforms; Integral transforms; Computer vision and image processing techniques; Computational complexity; Algebra

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