78 citations · 226 across the 13 of their papers we have counts for
13 papers
Visual Detection of Personal Protective Equipment and Safety Gear on Industry Workers
Jonathan Karlsson, Fredrik Strand, Josef Bigun +3
Workplace injuries are common in today's society due to a lack of adequately worn safety equipment. A system that only admits appropriately equipped personnel can be created to imp…
Fingerprint Image-Quality Estimation and its Application to Multialgorithm Verification
Hartwig Fronthaler, Klaus Kollreider, Josef Bigun +4
Signal-quality awareness has been found to increase recognition rates and to support decisions in multisensor environments significantly. Nevertheless, automatic quality assessment…
Near-infrared and visible-light periocular recognition with Gabor features using frequency-adaptive automatic eye detection
Fernando Alonso-Fernandez, Josef Bigun
Periocular recognition has gained attention recently due to demands of increased robustness of face or iris in less controlled scenarios. We present a new system for eye detection…
Experimental analysis regarding the influence of iris segmentation on the recognition rate
Heinz Hofbauer, Fernando Alonso-Fernandez, Josef Bigun +1
In this study the authors will look at the detection and segmentation of the iris and its influence on the overall performance of the iris-biometric tool chain. The authors will ex…
Real-time AdaBoost cascade face tracker based on likelihood map and optical flow
Andreas Ranftl, Fernando Alonso-Fernandez, Stefan Karlsson +1
The authors present a novel face tracking approach where optical flow information is incorporated into a modified version of the Viola Jones detection algorithm. In the original al…
Compact multi-scale periocular recognition using SAFE features
Fernando Alonso-Fernandez, Anna Mikaelyan, Josef Bigun
In this paper, we present a new approach for periocular recognition based on the Symmetry Assessment by Feature Expansion (SAFE) descriptor, which encodes the presence of various s…
Very Low-Resolution Iris Recognition Via Eigen-Patch Super-Resolution and Matcher Fusion
Fernando Alonso-Fernandez, Reuben A. Farrugia, Josef Bigun
Current research in iris recognition is moving towards enabling more relaxed acquisition conditions. This has effects on the quality of acquired images, with low resolution being a…
Super-Resolution for Selfie Biometrics: Introduction and Application to Face and Iris
Fernando Alonso-Fernandez, Reuben A. Farrugia, Julian Fierrez +1
The lack of resolution has a negative impact on the performance of image-based biometrics. Many applications which are becoming ubiquitous in mobile devices do not operate in a con…
LFW-Beautified: A Dataset of Face Images with Beautification and Augmented Reality Filters
Pontus Hedman, Vasilios Skepetzis, Kevin Hernandez-Diaz +2
Selfie images enjoy huge popularity in social media. The same platforms centered around sharing this type of images offer filters to beautify them or incorporate augmented reality…
Continuous Examination by Automatic Quiz Assessment Using Spiral Codes and Image Processing
Fernando Alonso-Fernandez, Josef Bigun
We describe a technical solution implemented at Halmstad University to automatise assessment and reporting of results of paper-based quiz exams. Paper quizzes are affordable and wi…
Facial Masks and Soft-Biometrics: Leveraging Face Recognition CNNs for Age and Gender Prediction on Mobile Ocular Images
Fernando Alonso-Fernandez, Kevin Hernandez Diaz, Silvia Ramis +2
We address the use of selfie ocular images captured with smartphones to estimate age and gender. Partial face occlusion has become an issue due to the mandatory use of face masks.…
Cross-Sensor Periocular Biometrics in a Global Pandemic: Comparative Benchmark and Novel Multialgorithmic Approach
Fernando Alonso-Fernandez, Kiran B. Raja, R. Raghavendra +4
The massive availability of cameras results in a wide variability of imaging conditions, producing large intra-class variations and a significant performance drop if heterogeneous…
Periocular Recognition Using CNN Features Off-the-Shelf
Kevin Hernandez-Diaz, Fernando Alonso-Fernandez, Josef Bigun
Periocular refers to the region around the eye, including sclera, eyelids, lashes, brows and skin. With a surprisingly high discrimination ability, it is the ocular modality requir…