no code implementations • 12 Apr 2022 • Fernando Alonso-Fernandez, Reuben A. Farrugia, Julian Fierrez, Josef Bigun
Such techniques are designed to restore generic images and therefore do not exploit the specific structure found in biometric images (e. g. iris or faces), which causes the solution to be sub-optimal.
1 code implementation • 11 Mar 2022 • Pontus Hedman, Vasilios Skepetzis, Kevin Hernandez-Diaz, Josef Bigun, Fernando Alonso-Fernandez
To help in counteracting such issues, we contribute with a database of facial images that includes several manipulations.
no code implementations • 26 Jan 2022 • 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.
no code implementations • 25 Jan 2022 • Adrian Leo Hagström, Rustam Stanikzai, Josef Bigun, Fernando Alonso-Fernandez
With ten enrolment samples, the Top-1 accuracy with deep features is around 94%, and reaches nearly 100% by Top-10.
no code implementations • 14 Nov 2021 • Fernando Alonso-Fernandez, Julian Fierrez, Javier Ortega-Garcia, Joaquin Gonzalez-Rodriguez, Hartwig Fronthaler, Klaus Kollreider, Josef Bigun
One of the open issues in fingerprint verification is the lack of robustness against image-quality degradation.
no code implementations • 17 Oct 2021 • Pontus Hedman, Vasilios Skepetzis, Kevin Hernandez-Diaz, Josef Bigun, Fernando Alonso-Fernandez
Although there is room for improvement, when neither U-NET reconstruction nor training with filtered images is applied, the accuracy with filters that severely occlude the eye is <72% (identification) and >12% (EER)
no code implementations • 31 Mar 2021 • Fernando Alonso-Fernandez, Kevin Hernandez Diaz, Silvia Ramis, Francisco J. Perales, Josef Bigun
Also, the use of mobile devices has exploded, with the pandemic further accelerating the migration to digital services.
no code implementations • 26 Aug 2020 • Kevin Hernandez-Diaz, Fernando Alonso-Fernandez, Josef Bigun
Recognition experiments are done using a number of off-the-shelf periocular comparators based both on hand-crafted features and CNN descriptors.
no code implementations • 31 Jul 2020 • Fernando Alonso-Fernandez, Nicole Mariah Sharon Belvisi, Kevin Hernandez-Diaz, Naveed Muhammad, Josef Bigun
With a large number of training Tweets (>500), a good accuracy (Rank-5>80%) is achievable with only a few dozens of test Tweets, even with several thousands of authors.
no code implementations • 16 Jul 2020 • Fernando Alonso-Fernandez, Javier Barrachina, Kevin Hernandez-Diaz, Josef Bigun
Accordingly, we address the challenge of developing a lightweight face recognition network of just a few megabytes that can operate with sufficient accuracy in comparison to much larger models.
no code implementations • 16 May 2020 • Josef Bigun, Fernando Alonso-Fernandez
To that end, a novel multi-scale minutia model where location, direction, and scale of minutia parameters are steerable, without the creation of uncontrollable minutia is also presented.
no code implementations • 14 Feb 2020 • Kevin Hernandez Diaz, Fernando Alonso-Fernandez, Josef Bigun
Cross-spectral verification remains a big issue in biometrics, especially for the ocular area due to differences in the reflected features in the images depending on the region and spectrum used.
no code implementations • 21 Feb 2019 • Fernando Alonso-Fernandez, Kiran B. Raja, R. Raghavendra, Cristoph Busch, Josef Bigun, Ruben Vera-Rodriguez, Julian Fierrez
Experiments are also reported with a database of VIS images from different smartphones.
no code implementations • 23 Oct 2018 • Fernando Alonso-Fernandez, Josef Bigun, Cristofer Englund
Periocular is the facial region in the immediate vicinity of the eye.
no code implementations • 23 Oct 2018 • Ram P. Krish, Julian Fierrez, Daniel Ramos, Fernando Alonso-Fernandez, Josef Bigun
We report significant improvements in the rank identification accuracies when these minutiae matchers are augmented with our proposed algorithm based on rare minutiae features.
no code implementations • 8 Oct 2018 • Fernando Alonso-Fernandez, Josef Bigun
Periocular refers to the facial region in the vicinity of the eye, including eyelids, lashes and eyebrows.
no code implementations • 17 Sep 2018 • Kevin Hernandez-Diaz, Fernando Alonso-Fernandez, Josef Bigun
Periocular refers to the region around the eye, including sclera, eyelids, lashes, brows and skin.