An Identity Verification System Based On Fingerprint Technology For Civil Airport

In this paper, we established an automatic fingerprint identification system(AFIS) to verify passengers' identity for civil airports. It include fingerprint scanner, scanner_controling software, identification software, computer, external memory, output machine. Identification software, the core of our AFIS, consists of fingerprint-image acquization module and fingerprint verification module. Fingerprint verification module is responsible of acquiring fingerprint-images, pretreating, extracting minutia and putting minutia vector into database by scheduled flight. Fingerprint verification module answer for matching minutia vector of passengers' fingerprint to those of ticket_buyers in database to verify passengers' identity. This is the method and merits of system implementation:1. Using fingerprint scanner with acquization module, we enhance the real-time speciality of gray_level imge acquization.2. In the pretreatment, we mend image by gray-level and direction-raph filtering. The program we proposed, without binarization and thinning, has high rapidity and saves a lot of calculation time.3. By local direction-graph and nondirectable level, we position automatically the center of fingerprint image and finish the assortment of fingerprint image .4. In fingerprint verification, we verify wehther the passenger and the ticket-buyer is the same person by matching the minutia vector of passenger and the ticket-buyer's fingerprints in the database.5. AFIS we realized, will popularize rapidly for its interface succinctness and easy operation in software designed.