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Auflistung nach Autor:in "Grother, Patrick"

1 - 2 von 2
  • 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
    Quantitative standardization of iris image formats
    (BIOSIG 2009: biometrics and electronic signatures, 2009) Grother, Patrick
    This paper gives performance-based results for the application of a leading recognition algorithm applied to standardized iris imagery. The implementation was evaluated in NIST's IREX program. The program was conducted in cooperation with the iris recognition industry to evaluated whether standardized image formats can be interoperable and compact. This is required for federated applications in which iris data is exchanged between interoperating systems, passed across bandwidth-limited networks, or stored on identity credentials. The study gave quantitative support to the revision of the ISO/IEC 19794-6 standard. This paper shows the effect of compression on false non-match rate and also, notably on false match rate also. The paper compares JPEG and JPEG 2000.