no code implementations • 21 Aug 2024 • André Dörsch, Torsten Schlett, Peter Munch, Christian Rathgeb, Christoph Busch
Quality assessment algorithms measure the quality of a captured biometric sample.
no code implementations • 18 May 2024 • Christian Rathgeb, Mathias Ibsen, Denise Hartmann, Simon Hradetzky, Berglind Ólafsdóttir
The fairness of biometric systems, in particular facial recognition, is often analysed for larger demographic groups, e. g. female vs. male or black vs. white.
1 code implementation • 13 May 2024 • Lazaro Janier Gonzalez-Soler, Maciej Salwowski, Christian Rathgeb, Daniel Fischer
Tattoos have been used effectively as soft biometrics to assist law enforcement in the identification of offenders and victims, as they contain discriminative information, and are a useful indicator to locate members of a criminal gang or organisation.
2 code implementations • 16 Apr 2024 • Ivan DeAndres-Tame, Ruben Tolosana, Pietro Melzi, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Zhizhou Zhong, Yuge Huang, Yuxi Mi, Shouhong Ding, Shuigeng Zhou, Shuai He, Lingzhi Fu, Heng Cong, Rongyu Zhang, Zhihong Xiao, Evgeny Smirnov, Anton Pimenov, Aleksei Grigorev, Denis Timoshenko, Kaleb Mesfin Asfaw, Cheng Yaw Low, Hao liu, Chuyi Wang, Qing Zuo, Zhixiang He, Hatef Otroshi Shahreza, Anjith George, Alexander Unnervik, Parsa Rahimi, Sébastien Marcel, Pedro C. Neto, Marco Huber, Jan Niklas Kolf, Naser Damer, Fadi Boutros, Jaime S. Cardoso, Ana F. Sequeira, Andrea Atzori, Gianni Fenu, Mirko Marras, Vitomir Štruc, Jiang Yu, Zhangjie Li, Jichun Li, Weisong Zhao, Zhen Lei, Xiangyu Zhu, Xiao-Yu Zhang, Bernardo Biesseck, Pedro Vidal, Luiz Coelho, Roger Granada, David Menotti
Synthetic data is gaining increasing relevance for training machine learning models.
no code implementations • 2 Feb 2024 • Pietro Melzi, Christian Rathgeb, Ruben Tolosana, Ruben Vera-Rodriguez, Aythami Morales, Dominik Lawatsch, Florian Domin, Maxim Schaubert
They primarily arise from the unequal representations of demographic groups in the training data.
1 code implementation • 25 Jan 2024 • Torsten Schlett, Christian Rathgeb, Juan Tapia, Christoph Busch
Additional steps based on face recognition and face image quality assessment models reduce false positives, and facilitate the deduplication of the face images both for intra- and inter-subject duplicate sets.
no code implementations • 21 Jan 2024 • Mathias Ibsen, Lázaro J. González-Soler, Christian Rathgeb, Christoph Busch
Face recognition systems are widely deployed in high-security applications such as for biometric verification at border controls.
2 code implementations • 17 Nov 2023 • Pietro Melzi, Ruben Tolosana, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Ivan DeAndres-Tame, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Weisong Zhao, Xiangyu Zhu, Zheyu Yan, Xiao-Yu Zhang, Jinlin Wu, Zhen Lei, Suvidha Tripathi, Mahak Kothari, Md Haider Zama, Debayan Deb, Bernardo Biesseck, Pedro Vidal, Roger Granada, Guilherme Fickel, Gustavo Führ, David Menotti, Alexander Unnervik, Anjith George, Christophe Ecabert, Hatef Otroshi Shahreza, Parsa Rahimi, Sébastien Marcel, Ioannis Sarridis, Christos Koutlis, Georgia Baltsou, Symeon Papadopoulos, Christos Diou, Nicolò Di Domenico, Guido Borghi, Lorenzo Pellegrini, Enrique Mas-Candela, Ángela Sánchez-Pérez, Andrea Atzori, Fadi Boutros, Naser Damer, Gianni Fenu, Mirko Marras
Despite the widespread adoption of face recognition technology around the world, and its remarkable performance on current benchmarks, there are still several challenges that must be covered in more detail.
no code implementations • 8 Nov 2023 • Marta Gomez-Barrero, Javier Galbally, Christian Rathgeb, Christoph Busch
The wide deployment of biometric recognition systems in the last two decades has raised privacy concerns regarding the storage and use of biometric data.
no code implementations • 4 Oct 2023 • Daile Osorio-Roig, Lazaro J. Gonzalez-Soler, Christian Rathgeb, Christoph Busch
In the context of privacy protection, several template protection schemes have been proposed in the past.
no code implementations • 4 Oct 2023 • Daile Osorio-Roig, Mahdi Ghafourian, Christian Rathgeb, Ruben Vera-Rodriguez, Christoph Busch, Julian Fierrez
Nowadays, facial recognition systems are still vulnerable to adversarial attacks.
no code implementations • 4 Oct 2023 • Daile Osorio-Roig, Paul A. Gerlitz, Christian Rathgeb, Christoph Busch
Generally, privacy-enhancing face recognition systems are designed to offer permanent protection of face embeddings.
no code implementations • 19 Aug 2023 • Marcel Grimmer, Christian Rathgeb, Raymond Veldhuis, Christoph Busch
Accurate face recognition systems are increasingly important in sensitive applications like border control or migration management.
no code implementations • 17 Jul 2023 • Tim Rohwedder, Daile Osorio-Roig, Christian Rathgeb, Christoph Busch
We also study the impact in terms of recognition performance of the fingerprint textural information for two sensor types, i. e. optical and capacitive.
no code implementations • 31 May 2023 • Pietro Melzi, Christian Rathgeb, Ruben Tolosana, Ruben Vera-Rodriguez, Dominik Lawatsch, Florian Domin, Maxim Schaubert
We generate multiple synthetic datasets by changing GANDiffFace settings, and compare their mated and non-mated score distributions with the distributions provided by popular real-world datasets for face recognition, i. e. VGG2 and IJB-C. Our results show the feasibility of the proposed GANDiffFace, in particular the use of Diffusion models to enhance the (limited) intra-class variations provided by GANs towards the level of real-world datasets.
no code implementations • 27 Apr 2023 • Jannis Priesnitz, Axel Weißenfeld, Laurenz Ruzicka, Christian Rathgeb, Bernhard Strobl, Ralph Lessmann, Christoph Busch
In experiments, the MCLFIQ method is compared against the original NFIQ 2. 2 method, a sharpness-based quality assessment algorithm developed for contactless fingerprint images \rev{and the general purpose image quality assessment method BRISQUE.
1 code implementation • 23 Apr 2023 • Magnus Falkenberg, Anders Bensen Ottsen, Mathias Ibsen, Christian Rathgeb
To this end, we proposed a processing pipeline that initially utilizes StyleGAN3 to sample adult subjects, which are subsequently progressed to children of varying ages using InterFaceGAN.
1 code implementation • 23 Mar 2023 • Torsten Schlett, Christian Rathgeb, Juan Tapia, Christoph Busch
Additionally, a discard fraction limit or range must be selected to compute pAUC values, which can then be used to quantitatively rank quality assessment algorithms.
no code implementations • 5 Mar 2023 • Christian Rathgeb, Jascha Kolberg, Andreas Uhl, Christoph Busch
Biometric systems utilising deep learning have been shown to achieve auspicious recognition accuracy, surpassing human performance.
1 code implementation • 1 Mar 2023 • Marcel Grimmer, Christian Rathgeb, Christoph Busch
Evaluating the quality of facial images is essential for operating face recognition systems with sufficient accuracy.
no code implementations • 26 Feb 2023 • Hatef Otroshi Shahreza, Pietro Melzi, Dailé Osorio-Roig, Christian Rathgeb, Christoph Busch, Sébastien Marcel, Ruben Tolosana, Ruben Vera-Rodriguez
In this paper, we benchmark several cancelable biometrics (CB) schemes on different biometric characteristics.
no code implementations • 24 Feb 2023 • Torsten Schlett, Sebastian Schachner, Christian Rathgeb, Juan Tapia, Christoph Busch
This work investigates the effect of lossy image compression on a state-of-the-art face recognition model, and on multiple face image quality assessment models.
no code implementations • 17 Jan 2023 • Christian Rathgeb, Benjamin Tams, Johannes Merkle, Vanessa Nesterowicz, Ulrike Korte, Matthias Neu
The fuzzy vault scheme has been established as cryptographic primitive suitable for privacy-preserving biometric authentication.
no code implementations • 15 Nov 2022 • Johannes Merkle, Christian Rathgeb, Benjamin Tams, Dhay-Parn Lou, André Dörsch, Pawel Drozdowski
The goal of the project "Facial Metrics for EES" is to develop, implement and publish an open source algorithm for the quality assessment of facial images (OFIQ) for face recognition, in particular for border control scenarios. 1 In order to stimulate the harmonization of the requirements and practices applied for QA for facial images, the insights gained and algorithms developed in the project will be contributed to the current (2022) revision of the ISO/IEC 29794-5 standard.
no code implementations • 19 Aug 2022 • Indu Joshi, Marcel Grimmer, Christian Rathgeb, Christoph Busch, Francois Bremond, Antitza Dantcheva
This survey is intended for researchers and practitioners in the field of human analysis.
no code implementations • 21 Jun 2022 • Pietro Melzi, Christian Rathgeb, Ruben Tolosana, Ruben Vera-Rodriguez, Christoph Busch
Privacy-enhancing technologies are technologies that implement fundamental data protection principles.
no code implementations • 12 Feb 2022 • Cristian Botezatu, Mathias Ibsen, Christian Rathgeb, Christoph Busch
This work investigates the impact of fun selfie filters, which are frequently used to modify selfies, on face recognition systems.
no code implementations • 10 Feb 2022 • Mathias Ibsen, Christian Rathgeb, Pawel Drozdowski, Christoph Busch
Moreover, we demonstrate the feasibility of the generation by using a deep learning-based model for removing tattoos from face images.
no code implementations • 31 Jan 2022 • Christian Rathgeb, Robert Nichols, Mathias Ibsen, Pawel Drozdowski, Christoph Busch
To this end, various decision fusion methods are proposed incorporating the examiners' decision confidence, experience level, and their time to take a decision.
no code implementations • 28 Jan 2022 • Robert Nichols, Christian Rathgeb, Pawel Drozdowski, Christoph Busch
In recent years, increasing deployment of face recognition technology in security-critical settings, such as border control or law enforcement, has led to considerable interest in the vulnerability of face recognition systems to attacks utilising legitimate documents, which are issued on the basis of digitally manipulated face images.
no code implementations • 21 Jan 2022 • Christian Rathgeb, Daniel Fischer, Pawel Drozdowski, Christoph Busch
Doppelg\"angers (or lookalikes) usually yield an increased probability of false matches in a facial recognition system, as opposed to random face image pairs selected for non-mated comparison trials.
no code implementations • 24 Nov 2021 • Dailé Osorio-Roig, Christian Rathgeb, Pawel Drozdowski, Philipp Terhörst, Vitomir Štruc, Christoph Busch
Future works on privacy-enhancing face recognition are encouraged to include the proposed attack in evaluations on the privacy protection.
no code implementations • 18 Oct 2021 • Jannis Priesnitz, Christian Rathgeb, Nicolas Buchmann, Christoph Busch
We present the first method for synthetic generation of contactless fingerprint images, referred to as SynCoLFinGer.
no code implementations • 7 Oct 2021 • Mathias Ibsen, Lázaro J. González-Soler, Christian Rathgeb, Pawel Drozdowski, Marta Gomez-Barrero, Christoph Busch
Due to their convenience and high accuracy, face recognition systems are widely employed in governmental and personal security applications to automatically recognise individuals.
no code implementations • 27 Jul 2021 • Pawel Drozdowski, Fabian Stockhardt, Christian Rathgeb, Dailé Osorio-Roig, Christoph Busch
Protection of the biometric probe templates, as well as the stored reference templates and the created index is carried out using homomorphic encryption.
no code implementations • 15 Jun 2021 • Pawel Drozdowski, Christian Rathgeb, Christoph Busch
Recently, different researchers have found that the gallery composition of a face database can induce performance differentials to facial identification systems in which a probe image is compared against up to all stored reference images to reach a biometric decision.
no code implementations • 31 May 2021 • Christian Rathgeb, Pawel Drozdowski, Naser Damer, Dinusha C. Frings, Christoph Busch
Algorithmic decision systems have frequently been labelled as "biased", "racist", "sexist", or "unfair" by numerous media outlets, organisations, and researchers.
no code implementations • 17 Mar 2021 • Mathias Ibsen, Christian Rathgeb, Thomas Fink, Pawel Drozdowski, Christoph Busch
In this work, we investigate the impact that facial tattoos and paintings have on current face recognition systems.
no code implementations • 5 Mar 2021 • Christian Rathgeb, Kevin Bernardo, Nathania E. Haryanto, Christoph Busch
Results obtained from challenging cross-database experiments in which the analyzed retouching technique is unknown during training yield interesting findings: (1) most competitive detection performance is achieved for differential scenarios employing deep face representations; (2) image compression severely impacts the performance of face image manipulation detection schemes based on texture descriptors while methods utilizing deep face representations are found to be highly robust; (3) in some cases, the application of image compression might as well improve detection performance.
no code implementations • 5 Mar 2021 • Pawel Drozdowski, Fabian Stockhardt, Christian Rathgeb, Christoph Busch
The growing scope, scale, and number of biometric deployments around the world emphasise the need for research into technologies facilitating efficient and reliable biometric identification queries.
1 code implementation • 4 Mar 2021 • Jannis Priesnitz, Rolf Huesmann, Christian Rathgeb, Nicolas Buchmann, Christoph Busch
We provide a comprehensive description of the entire recognition pipeline and discuss important requirements for a fully automated capturing system.
no code implementations • 18 Feb 2021 • Marta Gomez-Barrero, Pawel Drozdowski, Christian Rathgeb, Jose Patino, Massimmiliano Todisco, Andras Nautsch, Naser Damer, Jannis Priesnitz, Nicholas Evans, Christoph Busch
Since early 2020 the COVID-19 pandemic has had a considerable impact on many aspects of daily life.
no code implementations • 4 Feb 2021 • Christian Rathgeb, Johannes Merkle, Johanna Scholz, Benjamin Tams, Vanessa Nesterowicz
As part of said feature transformation, a detailed analysis of different feature quantisation and binarisation techniques is conducted.
no code implementations • 2 Sep 2020 • Torsten Schlett, Christian Rathgeb, Olaf Henniger, Javier Galbally, Julian Fierrez, Christoph Busch
The performance of face analysis and recognition systems depends on the quality of the acquired face data, which is influenced by numerous factors.
no code implementations • 19 Jun 2020 • Torsten Schlett, Christian Rathgeb, Christoph Busch
All tested enhancer types exclusively use depth data as input, which differs from methods that enhance depth based on additional input data such as visible light color images.
no code implementations • 11 Jun 2020 • Kiran Raja, Matteo Ferrara, Annalisa Franco, Luuk Spreeuwers, Illias Batskos, Florens de Wit Marta Gomez-Barrero, Ulrich Scherhag, Daniel Fischer, Sushma Venkatesh, Jag Mohan Singh, Guoqiang Li, Loïc Bergeron, Sergey Isadskiy, Raghavendra Ramachandra, Christian Rathgeb, Dinusha Frings, Uwe Seidel, Fons Knopjes, Raymond Veldhuis, Davide Maltoni, Christoph Busch
Further, we present a new online evaluation platform to test algorithms on sequestered data.
no code implementations • 9 Jun 2020 • Christian Rathgeb, Pawel Drozdowski, Christoph Busch
Facial cosmetics have the ability to substantially alter the facial appearance, which can negatively affect the decisions of a face recognition.
no code implementations • 5 Jan 2020 • Ulrich Scherhag, Christian Rathgeb, Johannes Merkle, Christoph Busch
In addition, the application of deep face representations for differential morphing attack detection algorithms is investigated.
Cryptography and Security
no code implementations • 1 May 2019 • Juan Tapia, Christian Rathgeb, Christoph Busch
In this paper, we provide a comprehensive analysis of periocular-based sex-prediction (commonly referred to as gender classification) using state-of-the-art machine learning techniques.