2025

• Zarei, Amir; Hassanpour, Ahmad; Raja, Kiran. (2025) On Privacy, Accuracy, and Fairness Trade-offs in Facial Recognition. IEEE Access
  Academic article
• Shagdar, Zolbayar; Farmen, Anette Huuse; Amirshahi, Seyed Ali; Raja, Kiran. (2025) A Survey on Computer Vision-Based Automatic Assessment of Stroke and Facial Palsy. IEEE Access
  Academic article
• Zhang, Haoyu; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph Günther. (2025) SynMorph: Generating Synthetic Face Morphing Dataset With Mated Samples. IEEE Access
  Academic article
• Albaluchi, Yousaf Mohammad Yaqoob; Fu, Biying; Damer, Naser; Ramachandra, Raghavendra; Raja, Kiran. (2025) UAV-based person re-identification: A survey of UAV datasets, approaches, and challenges. Computer Vision and Image Understanding
  Academic article

2024

• Kabbani, Wassim Hassan; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph Günther. (2024) Radial Distortion in Face Images: Detection and Impact. IEEE conference proceedings IEEE conference proceedings
  Academic anthology/Conference proceedings
• Sandstrak, Grethe; Klefstad, Bjørn; Styve, Arne Gerhard; Bylappa Raja, Kiran. (2024) Analyzing Pedagogic Practice and Assessments in a Cross-Campus Programming Course. IEEE Transactions on Education
  Academic article
• Hassanpour, Ahmad; Jamalbafrani, Fatemeh; Yang, Bian; Raja, Kiran; Veldhuis, Raymond Nicolaas Johan; Fierrez, Julian. (2024) E2F-Net: Eyes-to-face inpainting via StyleGAN latent space. Pattern Recognition
  Academic article
• Rajput, Amitesh Singh; Agarwal, Arnav; Raja, Kiran. (2024) A robust multi-key authority system for privacy-preserving distribution and access control of healthcare data. Computer Communications
  Academic article
• Xu, Ying; Terhorst, Philipp; Pedersen, Marius; Bylappa Raja, Kiran. (2024) Analyzing Fairness in Deepfake Detection With Massively Annotated Databases. IEEE Transactions on Technology and Society
  Academic article
• Kessler, Roman; Raja, Kiran; Tapia, Juan; Busch, Christoph . (2024) Towards minimizing efforts for Morphing Attacks—Deep embeddings for morphing pair selection and improved Morphing Attack Detection. PLOS ONE
  Academic article
• Raj, M.S. Subodh; George, Sudhish N.; Raja, Kiran. (2024) Leveraging spatio-temporal features using graph neural networks for human activity recognition. Pattern Recognition
  Academic article
• Zhang, Haoyu; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph Günther. (2024) Generalized Single-Image-Based Morphing Attack Detection Using Deep Representations from Vision Transformer. IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)
  Academic article
• Chandaliya, Praveen Kumar; Bylappa Raja, Kiran; Zhang, Haoyu; Ramachandra, Raghavendra; Busch, Christoph Günther. (2024) Synthetic Ethnicity Alteration for Diversifying Face Datasets - Investigating Recognition and Quality. IEEE International Workshop on Information Forensics and Security (WIFS)
  Academic article
• Vats, Anuja; Volgyes, David; Vermeer, Martijn; Pedersen, Marius; Raja, Kiran; Fantin, Daniele S. M.. (2024) Terrain-Informed Self-Supervised Learning: Enhancing Building Footprint Extraction From LiDAR Data With Limited Annotations. IEEE Transactions on Geoscience and Remote Sensing
  Academic article
• Liu, Xinwei; Raja, Kiran; Wang, Renfang; Qiu, Hong; Wu, Hucheng; Sun, Dechao. (2024) A Latent Fingerprint in the Wild Database. IEEE Transactions on Information Forensics and Security
  Academic article
• Gupta, Sandeep; Raja, Kiran; Passerone, Roberto. (2024) Visual Prompt Engineering for Enhancing Facial Recognition Systems Robustness against Evasion Attacks. IEEE Access
  Academic article
• Joseph, Nirmal; George, Sudhish N; Ameer, P.M.; Raja, Kiran. (2024) MedDefend: Securing Medical IoT with Adaptive Noise Reduction Based Adversarial Detection. IEEE Internet of Things Journal
  Academic article
• Kabbani, Wassim Hassan; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph . (2024) Eye Sclera for Fair Face Image Quality Assessment. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Kabbani, Wassim Hassan; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph . (2024) Demographic Variability in Face Image Quality Measures. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Arıcan, Tuğçe; Veldhuis, Raymond Nicolaas Johan; Spreeuwers, Luuk; Bergeron, Loic Kevin; Busch, Christoph ; Jalilian, Ehsaneddin. (2024) A Comparative Study of Cross-Device Finger Vein Recognition Using Classical and Deep Learning Approaches. IET Biometrics
  Academic article

2023

• Xu, Ying; Bylappa Raja, Kiran; Verdoliva, L.; Pedersen, Marius. (2023) Learning Pairwise Interaction for Generalizable DeepFake Detection. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Vaghela, Hiren; Sarvaiya, Anjali; Premlani, Pranav; Agarwal, Abhishek; Upla, Kishor; Bylappa Raja, Kiran. (2023) DCAN:DenseNet with Channel Attention Network for Super-resolution of Wireless Capsule Endoscopy. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Zhang, Haoyu; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph Günther. (2023) Morph-PIPE: Plugging in Identity Prior to Enhance Face Morphing Attack Based on Diffusion Model. NIKT: Norsk IKT-konferanse for forskning og utdanning
  Academic article
• Gupta, Sandeep; Maple, Carsten; Crispo, Bruno; Raja, Kiran; Yautsiukhin, Artsiom; Martinelli, Fabio. (2023) A survey of human-computer interaction (HCI) & natural habits-based behavioural biometric modalities for user recognition schemes. Pattern Recognition
  Academic article
• Terhorst, Philipp; Huber, Marco; Damer, Naser; Kirchbuchner, Florian; Raja, Kiran; Kuijper, Arjan. (2023) Pixel-Level Face Image Quality Assessment for Explainable Face Recognition. IEEE Transactions on Biometrics, Behavior, and Identity Science
  Academic article
• Joseph, Jithin; George, Sudhish N.; Raja, Kiran. (2023) Parameter-Free Matrix Decomposition for Specular Reflections Removal in Endoscopic Images. IEEE Journal of Translational Engineering in Health and Medicine
  Academic article
• Veldhuis, Raymond Nicolaas Johan; Raja, Kiran. (2023) On the Relation Between ROC and CMC. IEEE Transactions on Biometrics, Behavior, and Identity Science
  Academic article
• Kabbani, Wassim Hassan; Bylappa Raja, Kiran; Busch, Christoph Günther. (2023) Robust Sclera Segmentation for Skin-Tone Agnostic Face Image Quality Assessment. IEEE conference proceedings IEEE conference proceedings
  Academic anthology/Conference proceedings
• Tapia, Juan E.; Busch, Christoph Günther; Zhang, Haoyu; Ramachandra, Raghavendra; Bylappa Raja, Kiran. (2023) Simulating Print/Scan Textures for Morphing Attack Detection. IEEE conference proceedings
  Academic chapter/article/Conference paper

2022

• Xu, Ying; Raja, Kiran; Pedersen, Marius. (2022) Supervised Contrastive Learning for Generalizable and Explainable DeepFakes Detection. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Alonso-Fernandez, Fernando; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph; Bigun, Josef; Vera-Rodriguez, Ruben. (2022) Cross-sensor periocular biometrics in a global pandemic: Comparative benchmark and novel multialgorithmic approach. Information Fusion
  Academic article
• Raja, Kiran; Mudgalgundurao, Raghavendra; Busch, Christoph. (2022) Towards better and unlinkable protected biometric templates using label-assisted discrete hashing. IET Biometrics
  Academic article
• Vats, Anuja; Raja, Kiran; Pedersen, Marius; Mohammed, Ahmed Kedir. (2022) Multichannel Residual Cues for Fine-Grained Classification in Wireless Capsule Endoscopy. IEEE Access
  Academic article
• Raja, Kiran; Gupta, Gourav; Venkatesh, Sushma; Ramachandra, Raghavendra; Busch, Christoph. (2022) Towards generalized morphing attack detection by learning residuals. Image and Vision Computing
  Academic article
• Gupta, Sandeep; Raja, Kiran; Martinelli, Fabio; Crispo, Bruno. (2022) RIDERAUTH: A cancelable touch-signature based rider authentication scheme for driverless taxis. Journal of Information Security and Applications
  Academic article
• Xu, Ying; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph . (2022) Adversarial Attacks on Face Recognition Systems. Springer
  Chapter
• Rezaee Borj, Parisa; Raja, Kiran; Bours, Patrick Adrianus. (2022) Online grooming detection: A comprehensive survey of child exploitation in chat logs. Knowledge-Based Systems
  Academic article
• Mudgalgundurao, Raghavendra; Schuch, Patrick; Raja, Kiran; Ramachandra, Raghavendra; Damer, Naser. (2022) Pixel-wise supervision for presentation attack detection on identity document cards. IET Biometrics
  Academic article
• Hassanpour, Ahmad; Daryani, Amir Etefaghi; Mirmahdi, Mahdieh; Raja, Kiran; Yang, Bian; Busch, Christoph. (2022) E2F-GAN: Eyes-to-Face Inpainting via Edge-Aware Coarse-to-Fine GANs. IEEE Access
  Academic article
• Rouhani, Majid; Olsø, Atle; Styve, Arne; Raja, Kiran. (2022) An Experience Report on Transitioning to Blended Learning and Portfolio-assessment: a Cross-campus Course in Programming. IEEE Global Engineering Education Conference, EDUCON
  Academic article

2021

• Brömme, Arslan; Busch, Christoph; Damer, Naser; Dantcheva, Antitza; Gomez-Barrero, Marta; Raja, Kiran. (2021) Proceedings of the 20th International Conference of the Biometrics Special Interest Group (BIOSIG2021). Gesellschaft für Informatik GI-Edition Lecture Notes in Informatics (LNI) (20)
  Academic anthology/Conference proceedings
• Zhang, Haoyu; Venkatesh, Sushma; Ramachandra, Raghavendra; Raja, Kiran; Damer, Naser; Busch, Christoph. (2021) MIPGAN—Generating Strong and High Quality Morphing Attacks Using Identity Prior Driven GAN. IEEE Transactions on Biometrics, Behavior, and Identity Science
  Academic article
• Venkatesh, Sushma; Ramachandra, Raghavendra; Raja, Kiran; Busch, Christoph. (2021) Face Morphing Attack Generation and Detection: A Comprehensive Survey. IEEE Transactions on Technology and Society
  Academic article
• Leiknes, Halgeir; Svendsen, Marit; Osen, Ottar; Raja, Kiran; Gebremedhin, Alemayehu; Stuen, Ina Merete. (2021) Fremtidens teknologistudier (FTS), grupperapport: A1 - Bachelor i ingeniørfag. NTNU
  Report
• Ramachandra, Raghavendra; Damer, Naser; Raja, Kiran; Rattani, Ajita. (2021) Guest Editorial: WACV 2020—Presentation attacks on biometric systems. IET Biometrics
  Editorial
• Borj, Parisa Rezaee; Raja, Kiran; Bours, Patrick. (2021) Detecting Sexual Predatory Chats by Perturbed Data and Balanced Ensembles. Gesellschaft für Informatik
  Academic chapter/article/Conference paper
• Prajapati, Kalpesh; Chudasama, Vishal; Patel, Heena; Upla, Kishor; Raja, Kiran; Ramachandra, Raghavendra. (2021) Direct Unsupervised Super-Resolution Using Generative Adversarial Network (DUS-GAN) for Real-World Data. IEEE Transactions on Image Processing
  Academic article
• Raja, Kiran; Ferrara, Matteo; Franco, Annalisa; Spreeuwers, Luuk; Batskos, Ilias; Wit, Florens de. (2021) Morphing Attack Detection-Database, Evaluation Platform, and Benchmarking. IEEE Transactions on Information Forensics and Security
  Academic article
• Zhang, Haoyu; Grimmer, Marcel; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph. (2021) On the Applicability of Synthetic Data for Face Recognition. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Busch, Christoph; Czajka, Adam; Deravi, Farzin; Drozdowski, Pawel; Gomez‐Barrero, Marta; Hasse, Georg. (2021) A response to the European Data Protection Supervisor ‘Misunderstandings in Biometrics’ by the European Association for Biometrics. IET Biometrics
  Academic article
• Patel, Heena; Chudasama, Vishal; Prajapati, Kalpesh; Upla, Kishor; Raja, Kiran; Ramachandra, Raghavendra. (2021) ThermISRnet: An efficient thermal image super-resolution network. Optical Engineering: The Journal of SPIE
  Academic article
• Chudasama, Vishal; Upla, Kishor; Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2021) Compact and progressive network for enhanced single image super-resolution—ComPrESRNet. The Visual Computer
  Academic article
• Damer, Naser; Raja, Kiran; Süßmilch, Marius; Venkatesh, Sushma; Boutros, Fadi; Fang, Meiling. (2021) Regenmorph: visibly realistic GAN generated face morphing attacks by attack re-generation. Lecture Notes in Computer Science (LNCS)
  Academic article

2020

• Venkatesh, Sushma; Ramachandra, Raghavendra; Raja, Kiran; Busch, Christoph. (2020) Single image face morphing attack detection using ensemble of features. 2020 IEEE 23rd International Conference on Information Fusion (FUSION)
  Academic article
• Venkatesh, Sushma; Ramachandra, Raghavendra; Raja, Kiran; Spreeuwers, Luuk; Veldhuis, Raymond; Busch, Christoph. (2020) Detecting morphed face attacks using residual noise from deep multi-scale context aggregation network. 2020 IEEE Winter Conference on Applications of Computer Vision (WACV)
  Academic article
• Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2020) Fused Spectral Features in Kernel Weighted Collaborative Representation for Gender Classification Using Ocular Images. Advances in Intelligent Systems and Computing
  Academic article
• Auksorius, Egidijus; Raja, Kiran; Topcu, Berkay; Ramachandra, Raghavendra; Busch, Christoph; Boccara, Claude A. (2020) Compact and Mobile Full-Field Optical Coherence Tomography Sensor for Subsurface Fingerprint Imaging. IEEE Access
  Academic article
• Boutros, Fadi; Damer, Naser; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Kirchbuchner, Florian; Kuijper, Arjan. (2020) Iris and periocular biometrics for head mounted displays: Segmentation, recognition, and synthetic data generation. Image and Vision Computing
  Academic article
• Boutros, Fadi; Damer, Naser; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Kirchbuchner, Florian; Kuijper, Arjan. (2020) Periocular Biometrics in Head-Mounted Displays: A Sample Selection Approach for Better Recognition. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2020) Collaborative representation of blur invariant deep sparse features for periocular recognition from smartphones. Image and Vision Computing
  Academic article
• Chudasama, Vishal; Patel, Heena; Prajapati, Kalpesh; Upla, Kishor; Ramachandra, Raghavendra; Bylappa Raja, Kiran. (2020) TherISuRNet-A Computationally Efficient Thermal Image Super-Resolution Network. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Boutros, Fadi; Damer, Naser; Fang, Meiling; Bylappa Raja, Kiran; Kirchbuchner, Florian; Kuijper, Arjan. (2020) Compact Models for Periocular Verification through Knowledge Distillation. Gesellschaft für Informatik
  Academic chapter/article/Conference paper
• Boutros, Fadi; Damer, Naser; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Kirchbuchner, Florian; Kuijper, Arjan. (2020) Fusing Iris and Periocular Region for User Verification in Head Mounted Displays. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Rai, Aashish; Chudasama, Vishal; Upla, Kishor; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2020) ComSupResNet: A Compact Super-Resolution Network for Low-Resolution Face Images. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Prajapati, Kalpesh; Chudasama, Vishal; Patel, Heena; Upla, Kishor; Ramachandra, Raghavendra; Bylappa Raja, Kiran. (2020) Unsupervised single image super-resolution network (usisresnet) for real-world data using generative adversarial network. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Brömme, Arslan; Busch, Christoph; Dantcheva, Antitza; Raja, Kiran; Rathgeb, Christian; Uhl, Andreas. (2020) Proceedings of the 19th International Conference of the Biometrics Special Interest Group (BIOSIG 2020). Gesellschaft für Informatik GI-Edition Lecture Notes in Informatics (LNI) (19)
  Academic anthology/Conference proceedings

2019

• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2019) Anchored kernel hashing for cancelable template protection for cross-spectral periocular data. Lecture Notes in Computer Science (LNCS)
  Academic article
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma; Busch, Christoph. (2019) Design and Development of Low-Cost Sensor to Capture Ventral and Dorsal Finger Vein for Biometric Authentication . IEEE Sensors Journal
  Academic article
• Venkatesh, Sushma; Ramachandra, Raghavendra; Raja, Kiran; Spreeuwers, Luuk; Veldhuis, Raymond N.J.; Busch, Christoph. (2019) Morphed Face Detection Based on Deep Color Residual Noise. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Raja, Kiran; Damer, Naser; Ramachandra, Raghavendra; Boutros, Fadi; Busch, Christoph. (2019) Cross-Spectral Periocular Recognition by Cascaded Spectral Image Transformation. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Vetrekar, Narayan; Ramachandra, Raghavendra; Raja, Kiran; Gad, Rajendra S. (2019) Multi-spectral Imaging To Detect Artificial Ripening Of Banana: A Comprehensive Empirical Study. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Sanfilippo, Filippo; Raja, Kiran. (2019) A Multi-Sensor System for Enhancing Situational Awareness and Stress Management for People with ASD in the Workplace and in Everyday Life.
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2019) Towards Reducing the Error Rates in Template Protection for Iris Recognition Using Custom Cuckoo Filters. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Wasnik, Pankaj Shivdayal; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph. (2019) An Empirical Evaluation of Deep Architectures on Generalization of Smartphone-based Face Image Quality Assessment. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Veldhuis, Raymond N.J.; Raja, Kiran; Ramachandra, Raghavendra. (2019) A likelihood ratio classifier for histogram features. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Bhattacharjee, Sushil; Wasnik, Pankaj Shivdayal; Marcel, Sebastien. (2019) Custom Silicone Face Masks: Vulnerability of Commercial Face Recognition Systems and Presentation Attack Detection. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Venkatesh, Sushma; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph. (2019) A New Multi-spectral Iris Acquisition Sensor for Biometric Verification and Presentation Attack Detection . IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Busch, Christoph. (2019) Towards making Morphing Attack Detection robust using hybrid Scale-Space Colour Texture Features. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Vetrekar, Narayan; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Gad, Rajendra S. (2019) Detecting Glass in Ocular Region Based on Grassmann Manifold Projection Metric Learning by Exploring Spectral Imaging. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Vetrekar, Narayan; Ramachandra, Raghavendra; Raja, Kiran; Gad, Rajendra S. (2019) Multi-Spectral Imaging for Artificial Ripened Banana Detection. European Workshop on Visual Information Processing
  Academic article
• Borj, Parisa Rezaee; Bylappa Raja, Kiran; Bours, Patrick. (2019) On Preprocessing the Data for Improving Sexual Predator Detection. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Raja, Kiran; Raghavendra, R.; Auksorius, Egidijus; Boccara, Claude; Busch, Christoph. (2019) Two Stream Convolutional Neural Network for Full Field Optical Coherence Tomography Fingerprint Recognition. IEEE Xplore Digital Library
  Academic article
• Vetrekar, Narayan; Ramachandra, Raghavendra; Raja, Kiran; Venkatesh, Sushma; Gad, Rajendra; Busch, Christoph. (2019) Visible to band gender classification: An extensive experimental evaluation based on multi-spectral imaging. IEEE Xplore Digital Library
  Academic article
• Raja, Kiran; Ramachandra, Raghavendra; Auksorius, Egidijus; Busch, Christoph. (2019) Subsurface and layer intertwined template protection using inherent properties of full-field optical coherence tomography fingerprint imaging. IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)
  Academic article
• Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2019) Obtaining Stable Iris Codes Exploiting Low-Rank Tensor Space and Spatial Structure Aware Refinement for Better Iris Recognition. IEEE Xplore Digital Library
  Academic article

2018

• Ramachandra, Raghavendra; Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2018) Improved ear verification after surgery - An approach based on collaborative representation of locally competitive features. Pattern Recognition
  Academic article
• Ramachandra, Raghavendra; Vetrekar, Narayan; Bylappa Raja, Kiran; Gad, Rajendra S; Busch, Christoph. (2018) Detecting Disguise Attacks on Multi-spectral Face Recognition Through Spectral Signatures. International Conference on Pattern Recognition
  Academic article
• Raja, Kiran B.; Ramachandra, Raghavendra; Busch, Christoph. (2018) Towards Protected and Cancelable Multi-Spectral Face Templates Using Feature Fusion and Kernalized Hashing. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raja, Kiran B.; Ramachandra, Raghavendra; Busch, Christoph. (2018) Manifold-Structure Preserving Biometric Templates - A Preliminary Study On Fully Cancelable Smartphone Biometric Templates. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Vetrekar, Narayan; Raja, Kiran; Ramachandra, Raghavendra; Gad, R.S.; Busch, Christoph. (2018) Multi-spectral Imaging For Robust Ocular Biometrics. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2018) Towards a Cancelable Template Protection Across NIR to Visible Spectrum Using Anchored Kernel Hashing – A Study on Cross-Spectral Periocular Images. Advances in Intelligent Systems and Computing
  Academic article
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Busch, Christoph. (2018) Detecting Face Morphing Attacks with Collaborative Representation of Steerable Features. Advances in Intelligent Systems and Computing
  Academic article
• Wasnik, Pankaj Shivdayal; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph. (2018) Subjective Logic Based Score Level Fusion: Combining Faces and Fingerprints. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Busch, Christoph. (2018) Transgender Face Recognition with Off-the-shelf Pre-trained CNNs: A comprehensive study. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Wasnik, Pankaj Shivdayal; Stokkenes, Martin; Busch, Christoph. (2018) Fusion of Multi-Scale Local Phase Quantization Features for Face Presentation Attack Detection. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Thorsen, Tommy Arild Garden; Wasnik, Pankaj Shivdayal; Busch, Christoph; Ramachandra, Raghavendra; Bylappa Raja, Kiran. (2018) Assessing Face Image Quality with LSTMs. Norsk Informasjonssikkerhetskonferanse (NISK)
  Academic article
• Ramachandra, Raghavendra; Venkatesh, Sushma; Bylappa Raja, Kiran; Busch, Christoph. (2018) A low-cost Multi-Fingervein Verification System. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Vetrekar, Narayan; Bylappa Raja, Kiran; Gad, Rajendra S; Busch, Christoph. (2018) Robust gender classification using extended multi-spectral imaging by exploring the spectral angle mapper. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma; Hegde, Sneha; Dandappanavar, Shreedhar; Busch, Christoph. (2018) Verifying the Newborns without Infection Risks Using Contactless Palmprints. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Khodabakhsh, Ali; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Wasnik, Pankaj Shivdayal; Busch, Christoph. (2018) Fake Face Detection Methods: Can They Be Generalized?. Gesellschaft für Informatik
  Academic chapter/article/Conference paper

2017

• Bylappa Raja, Kiran; Auksorius, Egidijus; Ramachandra, Raghavendra; Boccara, A. Claude; Busch, Christoph. (2017) Robust Verification With Subsurface Fingerprint Recognition Using Full Field Optical Coherence Tomography. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Wasnik, Pankaj Shivdayal; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2017) Presentation Attack Detection in Face Biometric Systems Using Raw Sensor Data from Smartphones. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2017) Scale-level score fusion of steered pyramid features for cross-spectral periocular verification. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Alaya Cheikh, Faouzi; Busch, Christoph. (2017) On the Vulnerability of Extended Multispectral Face Recognition Systems Towards Presentation Attacks . IEEE Sarnoff Symposium
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Venkatesh, Sushma Krupa; Bylappa Raja, Kiran; Busch, Christoph. (2017) Transferable deep convolutional neural network features for fingervein presentation attack detection. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Stokkenes, Martin; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Sigaard, Morten; Gomez-Barrero, Marta; Busch, Christoph. (2017) Multi-biometric template protection on smartphones: An approach based on binarized statistical features and bloom filters. Lecture Notes in Computer Science (LNCS)
  Academic article
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Multi-patch deep sparse histograms for iris recognition in visible spectrum using collaborative subspace for robust verification. Pattern Recognition Letters
  Academic article
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Transferable Deep-CNN Features for Detecting Digital and Print-Scanned Morphed Face Images. IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)
  Academic article
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Face Presentation Attack Detection by Exploring Spectral Signatures. IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)
  Academic article
• Wasnik, Pankaj Shivdayal; Schäfer, Katharina; Ramachandra, Raghavendra; Busch, Christoph; Bylappa Raja, Kiran. (2017) Fusing Biometric Scores Using Subjective Logic for Gait Recognition on Smartphone. GI-Edition Lecture Notes in Informatics (LNI)
  Academic article
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Marcel, Sebastien; Busch, Christoph. (2017) Face Presentation Attack Detection Across Spectrum using Time-Frequency Descriptors of Maximal Response in Laplacian Scale-Space. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Wasnik, Pankaj Shivdayal; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2017) Assessing Face Image Quality for Smartphone based Face Recognition System. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Scherhag, Ulrich; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Gomez-Barrero, Marta; Rathgeb, Christian; Busch, Christoph. (2017) On the Vulnerability of Face Recognition Systems Towards Morphed Face Attacks. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Shivakumara, Palaiahnakote; Raghavendra, Ramachandra; Qin, Longfei; Bylappa Raja, Kiran; Lu, Tong; Pal, Umapada. (2017) A new multi-modal approach to bib number/text detection and recognition in Marathon images. Pattern Recognition
  Academic article
• Narayan Tulshidas, Vetrekar; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Gad, R.S.; Busch, Christoph. (2017) Extended Spectral To Visible Comparison Based On Spectral Band Selection Method For Robust Face Recognition. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Vetrekar, Narayan; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Gad, R.S.; Busch, Christoph. (2017) Extended Multi-spectral Imaging For Gender Classification Based On Image Set. Association for Computing Machinery (ACM)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Face morphing versus face averaging: Vulnerability and detection. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Wasnik, Pankaj Shivdayal; Ramachandra, Raghavendra; Busch, Christoph. (2017) Robust face presentation attack detection on smartphones : An approach based on variable focus. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Stokkenes, Martin; Ramachandra, Raghavendra; Bylappa Raja, Kiran; Sigaard, Morten; Busch, Christoph. (2017) Feature Level Fused Templates for Multi-Biometric System on Smartphones. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Alonso-Fernandez, Fernando; Bylappa Raja, Kiran; Busch, Christoph; Bigun, Josef. (2017) Log-Likelihood Score Level Fusion for Improved Cross-Sensor Smartphone Periocular Recognition. European Signal Processing Conference
  Academic article
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Busch, Christoph. (2017) ContlensNet: Robust Iris Contact Lens Detection Using Deep Convolutional Neural Networks. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Extended multispectral face presentation attack detection: An approach based on fusing information from individual spectral bands. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Sequeira, Ana F; Chen, Lulu; Ferryman, James; Wild, Peter; Alonso-Fernandez, Fernando; Bigun, Josef. (2017) Cross-Eyed 2017: Cross-Spectral Iris/Periocular Recognition Competition. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Gomez-Barrero, Marta; Rathgeb, Christian; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2017) Biometric Symmetry: Implications on Template Protection. European Signal Processing Conference
  Academic article
• Vetrekar, Narayan; Bylappa Raja, Kiran; Ramachandra, Raghavendra; Gad, R.S.; Busch, Christoph. (2017) Collaborative Representation of Grassmann Manifold Projection Metric for Robust Multi-spectral Face Recognition. Association for Computing Machinery (ACM)
  Chapter
• Ramachandra, Raghavendra; Bylappa Raja, Kiran; Venkatesh, Sushma Krupa; Busch, Christoph. (2017) Collaborative representation of statistically independent filters? response: An application to face recognition under illicit drug abuse alterations. Lecture Notes in Computer Science (LNCS)
  Academic article

2016

• Bylappa Raja, Kiran; Raghavendra, Ramachandra; Busch, Christoph. (2016) Weighted Comparison Score Fusion for Accurate Verification of Surgically Altered Periocular Region. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Ramachandra; Busch, Christoph. (2016) Collaborative representation of deep sparse filtered features for robust verification of smartphone periocular images. IEEE Signal Processing Society
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Ramachandra; Busch, Christoph. (2016) Dynamic Scale Selected Laplacian Decomposed Frequency Response for Cross-Smartphone Periocular Verification in Visible Spectrum. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Wasnik, Pankaj Shivdayal; Bylappa Raja, Kiran; Raghavendra, Ramachandra; Busch, Christoph. (2016) Eye region based multibiometric fusion to mitigate the effects of body weight variations in face recognition. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Sequeira, Ana F; Chen, Lulu; Ferryman, James; Alonso-Fernandez, Fernando; Bigun, Josef; Bylappa Raja, Kiran. (2016) Cross-Eyed - Cross-Spectral Iris/Periocular Recognition Database and Competition. GI-Edition Lecture Notes in Informatics (LNI)
  Academic article
• Bylappa Raja, Kiran; Ramachandra, Raghavendra; Busch, Christoph. (2016) Cross-Spectrum Periocular Authentication for NIR and Visible Images Using Bank of Statistical Filters. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Ramachandra; Busch, Christoph. (2016) Biometric recognition of surgically altered periocular region: A comprehensive study. IEEE Press
  Academic chapter/article/Conference paper

2015

• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Stokkenes, Martin; Busch, Christoph. (2015) Fusion of Face and Periocular Information for Improved Authentication on Smartphones. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Alaya Cheikh, Faouzi; Busch, Christoph. (2015) Evaluation of Fusion Approaches for Face Recognition using Light Field Cameras. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Vemuri, Vinay Krishna; Busch, Christoph. (2015) Smartphone based visible iris recognition using deep sparse filtering. Pattern Recognition Letters
  Academic article
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Busch, Christoph. (2015) Exploring the Usefulness of Light Field Camera for Biometrics : An Empirical Study on Face and Iris Recognition. IEEE Transactions on Information Forensics and Security
  Academic article
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Busch, Christoph. (2015) Presentation Attack Detection for Face Recognition Using Light Field Camera. IEEE Transactions on Image Processing
  Academic article
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Stokkenes, Martin; Busch, Christoph. (2015) Multi-modal Authentication System for Smartphones Using Face, Iris and Periocular. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2015) Iris imaging in visible spectrum using white LED. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2015) Presentation attack detection using Laplacian decomposed frequency response for visible spectrum and Near-Infra-Red iris systems . IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2015) Time-Frequency Features of Laplacian Decomposition. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2015) Video Presentation Attack Detection in Visible Spectrum Iris Recognition Using Magnified Phase Information. IEEE Transactions on Information Forensics and Security
  Academic article

2014

• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Surbiryala, Jayachander; Busch, Christoph. (2014) A low-cost multimodal Biometric Sensor to capture Finger Vein and Fingerprint. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph; Mondal, Soumik. (2014) An Empirical Study of Smartphone Based Iris Recognition in Visible Spectrum. ACM Publications
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Surbiryala, Jayachander; Bylappa Raja, Kiran; Busch, Christoph. (2014) Novel Finger Vascular Pattern Imaging Device for Robust Biometric Verification. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Stokkenes, Martin; Busch, Christoph. (2014) Smartphone Authentication System Using Periocular Biometrics. Gesellschaft für Informatik
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2014) Smartphone Based Robust Iris Recognition in Visible Spectrum using Clustered K-means Features. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2014) Automatic Face Quality Assessment from Video using Gray Level Co-occurrence Matrix: An Empirical Study on Automatic Border Control System. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Busch, Christoph. (2014) Binarized statistical features for improved iris and periocular recognition in visible spectrum. IEEE conference proceedings
  Academic chapter/article/Conference paper

2013

• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) Combining Iris and Periocular Recognition using Light Field Camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Pedersen, Marius. (2013) Artifact detection in gamut mapped images using saliency. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Bylappa Raja, Kiran; Raghavendra, Rachamandra; Alaya Cheikh, Faouzi; Yang, Bian; Busch, Christoph. (2013) Robust iris recognition using light-field camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Pflug, Anika; Yang, Bian; Busch, Christoph. (2013) 3D face reconstruction and multimodal person identification from video captured using smartphone camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) Improved face recognition at a distance using light field camera & super resolution schemes. Association for Computing Machinery (ACM)
  Academic chapter/article/Conference paper
• Zakizadeh, Roshanak; Martinez, Juan; Bylappa Raja, Kiran; Siakidis, Christos. (2013) Study of factors affecting the appearance of colors under microscopes. SPIE - The International Society for Optics and Photonics
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) GUCLF: a new light field face database. SPIE - The International Society for Optics and Photonics
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) Comparative Evaluation of Super-Resolution Techniques For Multi-Face Recognition Using Light-Field Camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) A Novel Image Fusion Scheme For Robust Multiple Face Recognition With Light-field Camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Yang, Bian; Bylappa Raja, Kiran; Busch, Christoph. (2013) A New Perspective - Face Recognition with Light-Field Camera. IEEE conference proceedings
  Academic chapter/article/Conference paper
• Martinez, Juan; Zakizadeh, Roshanak; Bylappa Raja, Kiran; Siakidis, Christos. (2013) Chromatic differences introduced by microscope optics. The International Colour Association
  Academic chapter/article/Conference paper
• Raghavendra, Rachamandra; Bylappa Raja, Kiran; Yang, Bian; Busch, Christoph. (2013) Multi-face recognition at a distance using light-field camera. IEEE (Institute of Electrical and Electronics Engineers)
  Academic chapter/article/Conference paper