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Auflistung nach Autor:in "Tabassi, Elham"

1 - 4 von 4
  • Konferenzbeitrag
    Fingerprint sample quality metric NFIQ 2.0
    (BIOSIG 2011 – Proceedings of the Biometrics Special Interest Group, 2011) Bausinger, Oliver; Tabassi, Elham
    At the NIST March 2010 workshop on “The Future of NFIQ”, the development of a new (open source) version of NFIQ in consultation and collaboration with users and industry was recommended. Following this recommendation, NIST and BSI set up a joint project for the development of a successor version of NFIQ. This paper explains the reasons and needs for the development and details the planned approach and development process.
  • Konferenzbeitrag
    Large scale iris image quality evaluation
    (BIOSIG 2011 – Proceedings of the Biometrics Special Interest Group, 2011) Tabassi, Elham
    Several recent studies have shown that while iris images captured at near infrared are viable biometrics for verification and identification, similar to other biometrics, its performance drops when comparing images from imperfect sources (e.g. subject blinking), under imperfect conditions (e.g. out of focus) or non-ideal capture device. The immediate question to ask is what factors and to what degree are most influential on iris recognition performance. Motivated by this need, National Institute of Standards and Technology (NIST) initiated Iris Quality Evaluation and Calibration (IQCE). IQCE aims to define and quantify iris image properties that are influential on performance of iris recognition. This paper gives an overview of the IQCE.
  • Konferenzbeitrag
    Minutiae interoperability
    (BIOSIG 2009: biometrics and electronic signatures, 2009) Tabassi, Elham; Grother, Patrick; Salamon, Wayne; Watson, Craig
    Many large scale identity management applications require storage and exchange of standardized minutiae templates. Minutia templates offer a more spaceefficient, less resource intensive, and more cost effective alternative to raw images. Recent minutiae interoperability tests (ILO, MTIT, MINEX ) all reported variation in minutia selection and placement as the major factor affecting interoperability. This paper quantifies their effects and investigates how variation in selection and placement of minutia from different suppliers relates to loss of performance compared with proprietary templates. We concur with MTIT findings that conformance testing methodologies for evaluating the semantic content of minutia templates is essential and interoperability can be improved by closer adherence to the minutia placement requirement defined in a standard.
  • Konferenzbeitrag
    Semantic conformance testing methodology for finger minutiae data
    (BIOSIG 2009: biometrics and electronic signatures, 2009) Lodrova, Dana; Busch, Christoph; Tabassi, Elham; Krodel, Wolfgang; Drahansky, Martin
    This paper proposes a methodology to measure the semantic conformance rate of standardized biometric minutia interchange records. The paper proposes a fingerprint modality specific assertion test. A conformance test based on this methodology can attest for a given algorithm or software under test that the generated minutiae templates are a faithful representation of the input signal (i.e. fingerprint image). The test methodology is based on ground truth data that has been composed by dactyloscopic experts. As individual experts assessment yields slightly diverging coordinates a clustering algorithm is proposed that merges a set of manually placed minutia into one ground truth data set. The methodology is evaluated on ten-print fingerprint images and the NIST baseline minutia extraction algorithm.