Evaluating Liveness by Face Images and the Structure Tensor. - Klaus Kollreider; Hartwig Fronthaler; Josef Bigün (AutoID, 2005)

Local Feature Extraction in Fingerprints by Complex Filtering. - Hartwig Fronthaler; Klaus Kollreider; Josef Bigün (IWBRS, 2005)

Automatic Image Quality Assessment with Application in Biometrics. - Hartwig Fronthaler; Klaus Kollreider; Josef Bigün (CVPR Workshops, 2006)

Pyramid-based Image Enhancement of Fingerprints. - Hartwig Fronthaler; Klaus Kollreider; Josef Bigün (AutoID, 2007)

Real-Time Face Detection Using Illumination Invariant Features. - Klaus Kollreider; Hartwig Fronthaler; Josef Bigün (SCIA, 2007)

Combining multiple matchers for fingerprint verification: A case study in biosecure network of excellence. - Fernando Alonso-Fernandez; Julian Fiérrez-Aguilar; Hartwig Fronthaler; Klaus Kollreider; Javier Ortega-Garcia; Joaquin Gonzalez-Rodriguez; Josef Bigün (Ann. des Télécommunications, 2007)

A Comparative Study of Fingerprint Image-Quality Estimation Methods. - Fernando Alonso-Fernandez; Julian Fiérrez-Aguilar; Javier Ortega-Garcia; Joaquin Gonzalez-Rodriguez; Hartwig Fronthaler; Klaus Kollreider; Josef Bigün (IEEE Trans. Inf. Forensics Secur., 2007)

Real-Time Face Detection and Motion Analysis With Application in "Liveness" Assessment. - Klaus Kollreider; Hartwig Fronthaler; Maycel Isaac Faraj; Josef Bigün (IEEE Trans. Inf. Forensics Secur., 2007)

Verifying liveness by multiple experts in face biometrics. - Klaus Kollreider; Hartwig Fronthaler; Josef Bigün (CVPR Workshops, 2008)

Fingerprint Image-Quality Estimation and its Application to Multialgorithm Verification. - Hartwig Fronthaler; Klaus Kollreider; Josef Bigün; Julian Fiérrez-Aguilar; Fernando Alonso-Fernandez; Javier Ortega-Garcia; Joaquin Gonzalez-Rodriguez (IEEE Trans. Inf. Forensics Secur., 2008)

Local Features for Enhancement and Minutiae Extraction in Fingerprints. - Hartwig Fronthaler; Klaus Kollreider; Josef Bigün (IEEE Trans. Image Process., 2008)

Evidence for "liveness" in face biometrics. - Klaus Kollreider (2008)

Non-intrusive liveness detection by face images. - Klaus Kollreider; Hartwig Fronthaler; Josef Bigün (Image Vis. Comput., 2009)