Reconnecting Broken Ridges in Fingerprint Images

Authors:
Nadia Brancati;Maria Frucci;Gabriella Sanniti Baja
Affiliations:
Institute of Cybernetics "E. Caianiello", CNR, Pozzuoli, Italy;Institute of Cybernetics "E. Caianiello", CNR, Pozzuoli, Italy;Institute of Cybernetics "E. Caianiello", CNR, Pozzuoli, Italy
Venue:
ICIAP '09 Proceedings of the 15th International Conference on Image Analysis and Processing
Year:
2009

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Abstract

In this paper, we present a new method for reconnecting broken ridges in fingerprint images. The method is based on the use of a discrete directional mask and on the standard deviation of the gray-levels to determine ridge direction. The obtained direction map is smoothed by counting the occurrences of the directions in a sufficiently large window. The fingerprint image is, then, binarized and thinned. Linking paths to connect broken ridges are generated by using a morphological transformation to guide the process.