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Learning Fingerprint Orientation Fields Using Continuous Restricted Boltzmann MachinesAuthors: Mihir Sahasrabudhe,Anoop M Namboodiri Conference: ACPR 2013 Date: 2013-11-05 Report no: IIIT/TR/2013/121 AbstractWe aim to learn local orientation field patterns in fingerprints and correct distorted field patterns in noisy fin- gerprint images. This is formulated as a learning problem and achieved using two continuous restricted Boltzmann machines. The learnt orientation fields are then used in conjunction with traditional Gabor based algorithms for fingerprint enhance- ment. Orientation fields extracted by gradient-based methods are local, and do not consider neighboring orientations. If some amount of noise is present in a fingerprint, then these methods perform poorly when enhancing the image, affecting fingerprint matching. This paper presents a method to correct the resulting noisy regions over patches of the fingerprint by training two continuous restricted Boltzmann machines. The continuous RBMs are trained with clean fingerprint images and applied to overlapping patches of the input fingerprint. Experimental results show that one can successfully restore patches of noisy fingerprint images. Full paper: pdf Centre for Visual Information Technology |
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