• Benchmarking Binarisation Schemes for Deep Face Templates 

      Drozdowski, Pawel; Struck, Florian; Rathgeb, Christian; Busch, Christoph (Chapter, 2018)
      Feature vectors extracted from biometric characteristics are often represented using floating point values. It is, however, more appealing to store and compare feature vectors in a binary representation, since it generally ...
    • Computational Workload in Biometric Identification Systems: An Overview 

      Drozdowski, Pawel; Rathgeb, Christian; Busch, Christoph (Journal article; Peer reviewed, 2019)
      Computational workload is one of the key challenges in biometric identification systems. The na{\"i}ve retrieval method based on an exhaustive search becomes impractical with the growth of the number of the enrolled data ...
    • Database Binning and Retrieval in Multi-Fingerprint Identification Systems 

      Drozdowski, Pawel; Fischer, Daniel; Rathgeb, Christian; Schiel, Christopher; Busch, Christoph (Chapter, 2018)
      The increasingly large scale of deployed biometric systems necessitates approaches for computational workload reduction in order to perform identification queries efficiently. Simple database binning based on classification ...
    • Detection of Glasses in Near-Infrared Ocular Images 

      Drozdowski, Pawel; Struck, Florian; Rathgeb, Christian; Busch, Christoph (Chapter, 2018)
      Eyeglasses change the appearance and visual perception of facial images. Moreover, under objective metrics, glasses generally deteriorate the sample quality of near-infrared ocular images and as a consequence can worsen ...
    • Efficient privacy-preserving biometric identification in largescale multibiometric systems 

      Drozdowski, Pawel (Doctoral theses at NTNU;2020:115, Doctoral thesis, 2020)
      In recent years, applications of biometric systems on national and international scale have appeared. Biometric identification is one of the important operational modes of such systems. It entails ascertaining the data ...
    • Iris Recognition in Visible Wavelength: Impact and automated Detection of Glasses 

      Osorio-Roig, Daile; Drozdowski, Pawel; Rathgeb, Christian; Morales-González, Annette; Garea-Llano, Eduardo; Busch, Christoph (Chapter, 2018)
      The prevalence of visual impairment around the world is rapidly increasing, causing large numbers of people to wear glasses. Glasses are generally considered an important noise source in iris recognition; under objective ...
    • Multi-biometric Identification with Cascading Database Filtering 

      Drozdowski, Pawel; Mokroß, Benedikt-Alexander; Rathgeb, Christian; Busch, Christoph (Journal article, 2020)
      The growing scale and number of biometric deployments around the world necessitates research into technologies which facilitate fast identification queries and high discriminative power. In this context, this article ...
    • On the Application of Homomorphic Encryption to Face Identification 

      Drozdowski, Pawel; Buchmann, Nicolas; Rathgeb, Christian; Margraf, Marian; Busch, Christoph (Chapter, 2019)
      The data security and privacy of enrolled subjects is a critical requirement expected from biometric systems. This paper addresses said topic in facial biometric identification. In order to fulfil the properties of ...
    • Privacy-Preserving Indexing of Iris-Codes with Cancelable Bloom Filter-based Search Structures 

      Drozdowski, Pawel; Garg, Surabhi; Rathgeb, Christian; Gomez-Barrero, Marta; Chang, Donghoon; Busch, Christoph (Chapter, 2018)
      Protecting the privacy of the enrolled subjects is an important requirement expected from biometric systems. In recent years, numerous template protection schemes have been proposed, but so far none of them have been shown ...
    • Score Fusion Strategies in Single-Iris Dual-Probe Recognition Systems 

      Drozdowski, Pawel; Wiegand, Nikolai; Rathgeb, Christian; Busch, Christoph (Chapter, 2018)
      Multiple samples can be utilised at the comparison stage of a biometric system in order to increase its biometric performance via information fusion or decision heuristics. It has been shown, that in a single-instance ...
    • Turning a vulnerability into an asset: Accelerating Facial Identification with Morphing 

      Drozdowski, Pawel; Rathgeb, Christian; Busch, Christoph (Conference object; Peer reviewed, 2019)
      In recent years, morphing of facial images has arisen as an important attack vector on biometric systems. Detection of morphed images has proven challenging for automated systems and human experts alike. Likewise, in recent ...