A Multi-Classifier Approach to Fingerprint Classification |
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Authors: | Raffaele Cappelli Dario Maio Davide Maltoni |
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Affiliation: | (1) DEIS, CSITE – CNR, Università di Bologna, Bologna, Italy, IT |
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Abstract: | Fingerprint classification is a challenging pattern recognition problem which plays a fundamental role in most of the large fingerprint-based identification systems. Due to the intrinsic class ambiguity and the difficulty of processing very low quality images (which constitute a significant proportion), automatic fingerprint classification performance is currently below operating requirements, and most of the classification work is still carried out manually or semi-automatically. This paper explores the advantages of combining the MASKS and MKL-based classifiers, which we have specifically designed for the fingerprint classification task. In particular, a combination at the ‘abstract level’ is proposed for exclusive classification, whereas a fusion at the ‘measurement level’ is introduced for continuous classification. The advantages of coupling these distinct techniques are well evident; in particular, in the case of exclusive classification, the FBI challenge, requiring a classification error ≤ 1% at 20% rejection, was met on NIST-DB14. Received: 06 November 2000, Received in revised form: 25 October 2001, Accepted: 03 January 2002 |
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Keywords: | : Biometrics Classifier fusion Continuous classification Fingerprint classification Identification systems Multi-classifier |
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