Abstract
Fingerprint is a widely used distinguishing biometric characteristic and indexing has an important role in fingerprint identification for large databases. A method to represent ridge pattern is proposed for fingerprint indexing. Ridge pattern within a triangular area is represented by a numerical value, which is suitable to use as an index and very robust to elastic distortion. Experimental results are promising. The proposed representation method can be utilized to further narrow down the search space of databases by the other indexing methods, especially the ones based on minutiae triplets. DOI: http://dx.doi.org/10.5755/j01.eee.20.7.8026
Highlights
It is impractical to scan entire database for fingerprint identification
This study proposes a method to represent ridge patterns in fingerprints
It shows the probability that a searched fingerprint exists in the result set of fingerprint indexing system
Summary
It is impractical to scan entire database for fingerprint identification. Exclusive classification approaches distribute fingerprints into distinct classes. Number of classes, which is generally small and fingerprints are unevenly distributed among them, limits the selectivity of fingerprint classification. The other approach is continuous classification [1], that is indexing. Fingerprint indexing assigns numerical values extracted from their features to each fingerprint in the database. At the retrieval stage, queried fingerprint, too, is assigned numbers which are used to calculate similarities between the query fingerprint and the template fingerprints in the database. Only this set of fingerprints are compared with the query fingerprint
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