An Intrinsic Coordinate System for Fingerprint Matching

Bazen, Asker M. and Gerez, Sabih H. (2001) An Intrinsic Coordinate System for Fingerprint Matching. In: Third International Conference on Audio- and Video-based Biometric Person Authentication, AVBPA 2001, June 6-8, 2001, Halmstad, Sweden.

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Abstract:	In this paper, an intrinsic coordinate system is proposed for fingerprints. First the fingerprint is partitioned in regular regions, which are regions that contain no singular points. In each regular region, the intrinsic coordinate system is defined by the directional field. When using the intrinsic coordinates instead of pixel coordinates, minutiae are defined with respect to their position in the directional field. The resulting intrinsic minutiae coordinates can be used in a plastic distortioninvariant fingerprint matching algorithm. Plastic distortions, caused by pressing the 3-dimensional elastic fingerprint surface on a flat sensor, now deform the entire coordinate system, leaving the intrinsic minutiae coordinates unchanged. Therefore, matching algorithms with tighter tolerance margins can be applied to obtain better performance.
Item Type:	Conference or Workshop Item
Copyright:	© 2001 Springer
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Computer Architecture for Embedded Systems (CAES)
Link to this item:	http://purl.utwente.nl/publications/62435
Official URL:	http://dx.doi.org/10.1007/3-540-45344-X_28
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