Biometrische Middleware basierend auf BioAPI. - Markus Nuppeney; Marco Breitenstein; Frank Steffens (BIOSIG, 2007)

Towards Improving the NIST Fingerprint Image Quality (NFIQ) Algorithm. - Johannes Merkle; Michael Schwaiger; Marco Breitenstein (BIOSIG, 2010)

Towards Improving the NIST Fingerprint Image Quality (NFIQ) Algorithm (Extended Version) - Johannes Merkle; Michael Schwaiger; Oliver Bausinger; Marco Breitenstein; Kristina Elwart; Markus Nuppeney (CoRR, 2010)