Proposing the novelty classifier for face recognition

Abstract

Introduction: Face recognition, one of the most explored themes in biometry, is used in a wide range of applications: access control, forensic detection, surveillance and monitoring systems, and robotic and human machine interactions. In this paper, a new classifi er is proposed for face recognition: the novelty classifi er. Methods:The performance of a novelty classifi er is compared with the performance of the nearest neighbor classifi er. The ORL face image database was used. Three methods were employed for characteristic extraction: principal component analysis, bi-dimensional principal component analysis with dimension reduction in one dimension and bi-dimensional principal component analysis with dimension reduction in two directions. Results:In identifi cation mode, the best recognition rate with the leave-one-out strategy is equal to 100%. In the verifi cation mode, the best recognition rate was also 100%. For the half-half strategy, the best recognition rate in the identifi cation mode is equal to 98.5%, and in the verifi cation mode, 88%. Conclusion: For face recognition, the novelty classifi er performs comparable to the best results already published in the literature, which further confi rms the novelty classifi er as an important pattern recognition method in biometry.

A fully automatic method for recognizing hand configurations of Brazilian sign language

“…This classifier has recently been used for iris recognition (Costa et al, 2013) and for face recognition (Costa et al, 2014). In this study, we show the suitability of the novelty classifier for gesture recognition, more specifically, for Hand Configurations used by the Brazilian-deaf community.…”

“…• Evaluate the performance of two classifiers: the novelty classifier (Costa et al, 2013(Costa et al, , 2014, and the k-Nearest Neighbor classifier (kNN) (Wang, 2006), using this robust database.…”

“…In the following, we present both of them. The novelty classifier was previously proposed in Costa et al (2013Costa et al ( , 2014. In these previous studies, its mathematical formulation was based on the Gram-Schmidt orthogonalization process.…”

“…The motivations to use the novelty classifier in this study are the higher recognition rates obtained in the previous studies and the excellent generalization capability, even with a low number of samples in the training set (Costa et al, 2013(Costa et al, , 2014.…”