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Real handwriting authentication systems need a robust writer identification over a long time period. The paper analyzes signature sessions of the ATV-Signature Long Term Database (ATV-SLT DB). The database contains 6 sessions generated by 27 users over 15 month. The quality change of the verification results over a period of 15 month is examined. 64static and dynamic biometric features from the ATV-SLT...
In this Article we present a solution to verify user with safe handwritten password. To achieve the best possible results we use 39 parameters beside some statistical parameters we use primarily time, speed and relation parameter. For the tests a database with 32 users was provided. Each user wrote safe password in one session 12 times. For the FAR (false acceptance rate) test we work with 3 forgeries...
This article focuses on the writer verification using safe handwritten passwords on smartphones. We extract and select 25 static and dynamic biometric features from a handwritten character password sequence on an android touch-screen device. For the writer verification we use the classification algorithms of WEKA framework. Our 32 test persons wrote generated safe passwords with a length of 8 characters...
Die digitale Nahbereichsphotogrammetrie ermöglicht die berührungslose Erfassung von Verformungen, Rissen und anderen Schädigungen bei experimentellen Untersuchungen von Baustoffen, Bauteilen und Baukonstruktionen. Bei Beton bzw. Stahlbeton sind die zu beobachtenden Dehnungen (ca. 3, 5 ‰ Druckbruchdehnung, ca. 0,1 ‰ Zugbruchdehnung) und Rissbreiten (ab 0,05 mm) im Vergleich zu anderen Materialien sehr...
This paper deals with exploring of the potential of writer identification by handwriting on a touch-screen phone for an application in access control systems. Our aim was to examine the possibility of writer recognition by a biometric model based on handwritten password. A mobile phone-server solution based on distributed blocks is proposed. The implemented approach performs a pre-processing block,...
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