Blar i NTNU Open på forfatter "Busch, Christoph"
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Analyzing eyebrow region for morphed image detection
Zafar, Abdullah; Busch, Christoph (Peer reviewed; Journal article, 2023) -
Anchored kernel hashing for cancelable template protection for cross-spectral periocular data
Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph (Journal article; Peer reviewed, 2019)Periocular characteristics is gaining prominence in biometric systems and surveillance systems that operate either in NIR spectrum or visible spectrum. While the ocular information can be well utilized, there exists a ... -
An Attack on Facial Soft-Biometric Privacy Enhancement
Osorio-Roig, Daile; Rathgeb, Christian; Drozdowski, Pawel; Terhorst, Philipp; Struc, Vitomir; Busch, Christoph (Peer reviewed; Journal article, 2022)In the recent past, different researchers have proposed privacy-enhancing face recognition systems designed to conceal soft-biometric attributes at feature level. These works have reported impressive results, but generally ... -
Automated Authentication of Audiovisual Contents: A Biometric Approach
Khodabakhsh, Ali (Doctoral theses at NTNU;2021:213, Doctoral thesis, 2021)Following the introduction of image manipulation tools such as Adobe Photoshop in the early 2000s, the public trust in image authenticity dropped and the need for the development and deployment of image authentication ... -
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 ... -
Bias Mitigation in Face Recognition Systems using Synthetic Data
Kopperud, Pernille (Master thesis, 2023)De fleste moderne ansiktsgjenkjenningssystemer i dag er basert på dype læringsteknikker som krever en stor mengde merket treningsdata for å fungere tilfredsstillende. Med innføringen av personvernlover og forskrifter som ... -
BRAKE: Biometric Resilient Authenticated Key Exchange
Silde, Tjerand Aga; Bauspieß, Pia; Costache, Anamaria; Poljuha, Matej; Tullot, Alexandre; Rathgeb, Christian; Kolberg, Jascha; Busch, Christoph (Journal article; Peer reviewed, 2024)Biometric data are uniquely suited for connecting individuals to their digital identities. Deriving cryptographic key exchange from successful biometric authentication therefore gives an additional layer of trust compared ... -
Collecting fingerprints for recognition using mobile phone cameras
Yang, Bian; Li, Xue; Busch, Christoph (Journal article; Peer reviewed, 2012)We present in this paper a sample quality control approach for the case using a mobile phone’s camera as a fingerprint sensor for fingerprint recognition. Our approach directly estimates the maximum ridge frequency ... -
Compact and Mobile Full-Field Optical Coherence Tomography Sensor for Subsurface Fingerprint Imaging
Auksorius, Egidijus; Raja, Kiran; Topcu, Berkay; Ramachandra, Raghavendra; Busch, Christoph; Boccara, Claude A (Peer reviewed; Journal article, 2020)Conventional fingerprint sensors that are deployed in real-life applications lack the ability to peer inside a finger beyond the external surface. Subsurface information can provide complimentary biometric characteristics ... -
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 ... -
Cross-lingual Speaker Verification: Evaluation On X-Vector Method
Mandalapu, Hareesh; Møller Elbo, Thomas; Ramachandra, Raghavendra; Busch, Christoph (Chapter, 2021)Automatic Speaker Verification (ASV) systems accuracy is based on the spoken language used in training and enrolling speakers. Language dependency makes voice-based security systems less robust and generalizable to a wide ... -
Cross-sensor periocular biometrics in a global pandemic: Comparative benchmark and novel multialgorithmic approach
Alonso-Fernandez, Fernando; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph; Bigun, Josef; Vera-Rodriguez, Ruben; Fierrez, Julian (Peer reviewed; Journal article, 2022)The massive availability of cameras and personal devices results in a wide variability between imaging conditions, producing large intra-class variations and a significant performance drop if images from heterogeneous ... -
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 ... -
Deep Face Age Progression: A Survey
Grimmer, Marcel; Ramachandra, Raghavendra; Busch, Christoph (Peer reviewed; Journal article, 2021) -
Deep Learning for Fingerprint Recognition Systems
Schuch, Patrick (Doctoral theses at NTNU;2019:242, Doctoral thesis, 2019)Summary Biometric recognition is a typical means to identify individuals or to verify claimed identities. Use cases are manifold. For example, users can unlock their smartphones for convenience by presenting their faces ... -
Deep Learning Techniques for Face Image Quality Estimation
Thorsen, Tommy (Master thesis, 2018)Biometric authentication using fingerprints or face recognition is becoming mainstream, and there is a need to make these methods as secure and reliable as possible. One way to achieve better performance with a biometric ... -
Design and Development of Low-Cost Sensor to Capture Ventral and Dorsal Finger Vein for Biometric Authentication
Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma; Busch, Christoph (Peer reviewed; Journal article, 2019)Biometrics-based authentication of subjects is widely deployed in several real-life applications. Among various biometric characteristics, the finger-vein characteristic has demonstrated both reliable and highly accurate ... -
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 ... -
Differential Privacy Preservation in Robust Continual Learning
Hassanpour, Ahmad; Moradikia, Majid; Yang, Bian; Abdelhadi, Ahmed; Busch, Christoph; Fierrez, Julian (Peer reviewed; Journal article, 2022)Enhancing the privacy of machine learning (ML) algorithms has become crucial with the presence of different types of attacks on AI applications. Continual learning (CL) is a branch of ML with the aim of learning a set of ... -
E2F-GAN: Eyes-to-Face Inpainting via Edge-Aware Coarse-to-Fine GANs
Hassanpour, Ahmad; Daryani, Amir Etefaghi; Mirmahdi, Mahdieh; Raja, Kiran; Yang, Bian; Busch, Christoph; Fierrez, Julian (Peer reviewed; Journal article, 2022)Face inpainting is a challenging task aiming to fill the damaged or masked regions in face images with plausibly synthesized contents. Based on the given information, the reconstructed regions should look realistic and ...