Title :
Fingerprint scanner focusing estimation by Top Sharpening Index
Author :
Ferrara, Matteo ; Franco, Annalisa ; Maltoni, Davide
Author_Institution :
Univ. di Bologna, Cesena
Abstract :
The top sharpening index (TSI) is a measure proposed to simply evaluate fingerprint image focusing. In fact, though precise guidelines have been given by NIST and FBI for the evaluation of fingerprint scanners for AFIS applications, no simple and practical techniques have yet been proposed for non-AFIS environments. TSI is based on the measurement of the steepness of the ridge/valley transitions of the fingerprint impressions. In this work a deep analysis of TSI is carried out and its relation to two well known quality indicators (MTF e IQM) is investigated to highlight analogies and differences.
Keywords :
fingerprint identification; image resolution; automatic fingerprint identification system; fingerprint image focus evaluation; fingerprint scanner-focusing estimation; image quality index; top sharpening index measure; Fingerprint recognition; Focusing; Frequency measurement; Image analysis; Image matching; Image quality; NIST; Optical imaging; Quality assessment; Transfer functions;
Conference_Titel :
Image Analysis and Processing, 2007. ICIAP 2007. 14th International Conference on
Conference_Location :
Modena
Print_ISBN :
978-0-7695-2877-9
DOI :
10.1109/ICIAP.2007.4362783
