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EnglishThis work is motivated by the need of simple and practical techniques to evaluate fingerprint scanners for non-AFIS applications. One of the characteristics that has to be considered for the evaluation of a fingerprint scanner is the capability of providing well focused images. It is common practice to indirectly estimate this characteristic by measuring the scanner Modulation Transfer Function (MTF). Unfortunately this requires a rather complex setup and specific expensive targets. In this paper a novel index (TSI) is proposed to simply evaluate finger image focusing. The method is based on the measurement of the steepness of the ridge/valley transitions of the fingerprint impressions. The experimental results confirm the strict relation between the proposed index and the ability of a scanner to clearly focus the fingerprint.
| Titolo: | Estimating Image Focusing in Fingerprint Scanners |
| Autore/i: | FERRARA, MATTEO; FRANCO, ANNALISA; MALTONI, DAVIDE |
| Autore/i Unibo: | |
| Anno: | 2007 |
| Titolo del libro: | 2007 IEEE Workshop on Automatic Identification Advanced Technologies - Proceedings |
| Pagina iniziale: | 30 |
| Pagina finale: | 34 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/AUTOID.2007.380588 |
| Abstract: | This work is motivated by the need of simple and practical techniques to evaluate fingerprint scanners for non-AFIS applications. One of the characteristics that has to be considered for the evaluation of a fingerprint scanner is the capability of providing well focused images. It is common practice to indirectly estimate this characteristic by measuring the scanner Modulation Transfer Function (MTF). Unfortunately this requires a rather complex setup and specific expensive targets. In this paper a novel index (TSI) is proposed to simply evaluate finger image focusing. The method is based on the measurement of the steepness of the ridge/valley transitions of the fingerprint impressions. The experimental results confirm the strict relation between the proposed index and the ability of a scanner to clearly focus the fingerprint. |
| Data prodotto definitivo in UGOV: | 22-ott-2007 |
| Data stato definitivo: | 22-mag-2017 |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
File in questo prodotto:
http://hdl.handle.net/11585/49098
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