Search Results for author: Javier Ortega-Garcia

Found 43 papers, 14 papers with code

Biometric Presentation Attack Detection: Beyond the Visible Spectrum

no code implementations28 Feb 2019 Ruben Tolosana, Marta Gomez-Barrero, Christoph Busch, Javier Ortega-Garcia

The increased need for unattended authentication in multiple scenarios has motivated a wide deployment of biometric systems in the last few years.

edBB: Biometrics and Behavior for Assessing Remote Education

1 code implementation10 Dec 2019 Javier Hernandez-Ortega, Roberto Daza, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia

We present a platform for student monitoring in remote education consisting of a collection of sensors and software that capture biometric and behavioral data.

EEG

DeepFakes and Beyond: A Survey of Face Manipulation and Fake Detection

2 code implementations1 Jan 2020 Ruben Tolosana, Ruben Vera-Rodriguez, Julian Fierrez, Aythami Morales, Javier Ortega-Garcia

The free access to large-scale public databases, together with the fast progress of deep learning techniques, in particular Generative Adversarial Networks, have led to the generation of very realistic fake content with its corresponding implications towards society in this era of fake news.

Attribute DeepFake Detection +2

BioTouchPass2: Touchscreen Password Biometrics Using Time-Aligned Recurrent Neural Networks

1 code implementation28 Jan 2020 Ruben Tolosana, Ruben Vera-Rodriguez, Julian Fierrez, Javier Ortega-Garcia

ii) We perform a complete analysis of the proposed approach considering both traditional authentication systems such as Dynamic Time Warping (DTW) and novel approaches based on Recurrent Neural Networks (RNNs).

Dynamic Time Warping

DeepSign: Deep On-Line Signature Verification

1 code implementation24 Feb 2020 Ruben Tolosana, Ruben Vera-Rodriguez, Julian Fierrez, Javier Ortega-Garcia

Deep learning has become a breathtaking technology in the last years, overcoming traditional handcrafted approaches and even humans for many different tasks.

Dynamic Time Warping

SVC-onGoing: Signature Verification Competition

1 code implementation13 Aug 2021 Ruben Tolosana, Ruben Vera-Rodriguez, Carlos Gonzalez-Garcia, Julian Fierrez, Aythami Morales, Javier Ortega-Garcia, Juan Carlos Ruiz-Garcia, Sergio Romero-Tapiador, Santiago Rengifo, Miguel Caruana, Jiajia Jiang, Songxuan Lai, Lianwen Jin, Yecheng Zhu, Javier Galbally, Moises Diaz, Miguel Angel Ferrer, Marta Gomez-Barrero, Ilya Hodashinsky, Konstantin Sarin, Artem Slezkin, Marina Bardamova, Mikhail Svetlakov, Mohammad Saleem, Cintia Lia Szucs, Bence Kovari, Falk Pulsmeyer, Mohamad Wehbi, Dario Zanca, Sumaiya Ahmad, Sarthak Mishra, Suraiya Jabin

This article presents SVC-onGoing, an on-going competition for on-line signature verification where researchers can easily benchmark their systems against the state of the art in an open common platform using large-scale public databases, such as DeepSignDB and SVC2021_EvalDB, and standard experimental protocols.

Task 2

IFBiD: Inference-Free Bias Detection

1 code implementation9 Sep 2021 Ignacio Serna, Daniel DeAlcala, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia

This paper is the first to explore an automatic way to detect bias in deep convolutional neural networks by simply looking at their weights.

Bias Detection

Iris Recognition Based on SIFT Features

no code implementations30 Oct 2021 Fernando Alonso-Fernandez, Pedro Tome-Gonzalez, Virginia Ruiz-Albacete, Javier Ortega-Garcia

We extract characteristic SIFT feature points in scale space and perform matching based on the texture information around the feature points using the SIFT operator.

Iris Recognition

A high performance fingerprint liveness detection method based on quality related features

no code implementations2 Nov 2021 Javier Galbally, Fernando Alonso-Fernandez, Julian Fierrez, Javier Ortega-Garcia

A new software-based liveness detection approach using a novel fingerprint parameterization based on quality related features is proposed.

Benchmarking Quality-Dependent and Cost-Sensitive Score-Level Multimodal Biometric Fusion Algorithms

no code implementations17 Nov 2021 Norman Poh, Thirimachos Bourlai, Josef Kittler, Lorene Allano, Fernando Alonso-Fernandez, Onkar Ambekar, John Baker, Bernadette Dorizzi, Omolara Fatukasi, Julian Fierrez, Harald Ganster, Javier Ortega-Garcia, Donald Maurer, Albert Ali Salah, Tobias Scheidat, Claus Vielhauer

The cost-sensitive evaluation, on the other hand, investigates how well a fusion algorithm can perform given restricted computation and in the presence of software and hardware failures, resulting in errors such as failure-to-acquire and failure-to-match.

Benchmarking

Quality Measures in Biometric Systems

no code implementations17 Nov 2021 Fernando Alonso-Fernandez, Julian Fierrez, Javier Ortega-Garcia

Biometric technology has been increasingly deployed in the past decade, offering greater security and convenience than traditional methods of personal recognition.

Biometric Signature Verification Using Recurrent Neural Networks

no code implementations3 May 2022 Ruben Tolosana, Ruben Vera-Rodriguez, Julian Fierrez, Javier Ortega-Garcia

Architectures based on Recurrent Neural Networks (RNNs) have been successfully applied to many different tasks such as speech or handwriting recognition with state-of-the-art results.

Handwriting Recognition

Fingerprint Liveness Detection Based on Quality Measures

no code implementations11 Jul 2022 Javier Galbally, Fernando Alonso-Fernandez, Julian Fierrez, Javier Ortega-Garcia

A new fingerprint parameterization for liveness detection based on quality measures is presented.

A review of schemes for fingerprint image quality computation

no code implementations12 Jul 2022 Fernando Alonso-Fernandez, Julian Fierrez-Aguilar, Javier Ortega-Garcia

Fingerprint image quality affects heavily the performance of fingerprint recognition systems.

Fingerprint Image-Quality Estimation and its Application to Multialgorithm Verification

no code implementations24 Nov 2022 Hartwig Fronthaler, Klaus Kollreider, Josef Bigun, Julian Fierrez, Fernando Alonso-Fernandez, Javier Ortega-Garcia, Joaquin Gonzalez-Rodriguez

This is also supported by numerous experiments involving a simpler quality estimator, a trained method (NFIQ), as well as the human perception of fingerprint quality on several public databases.

Computational Efficiency Image Quality Estimation

Human-Centric Multimodal Machine Learning: Recent Advances and Testbed on AI-based Recruitment

1 code implementation13 Feb 2023 Alejandro Peña, Ignacio Serna, Aythami Morales, Julian Fierrez, Alfonso Ortega, Ainhoa Herrarte, Manuel Alcantara, Javier Ortega-Garcia

With the aim of studying how current multimodal algorithms based on heterogeneous sources of information are affected by sensitive elements and inner biases in the data, we propose a fictitious case study focused on automated recruitment: FairCVtest.

Decision Making Fairness

Introduction to Presentation Attacks in Signature Biometrics and Recent Advances

no code implementations16 Feb 2023 Carlos Gonzalez-Garcia, Ruben Tolosana, Ruben Vera-Rodriguez, Julian Fierrez, Javier Ortega-Garcia

Applications based on biometric authentication have received a lot of interest in the last years due to the breathtaking results obtained using personal traits such as face or fingerprint.

AI4Food-NutritionFW: A Novel Framework for the Automatic Synthesis and Analysis of Eating Behaviours

1 code implementation12 Sep 2023 Sergio Romero-Tapiador, Ruben Tolosana, Aythami Morales, Isabel Espinosa-Salinas, Gala Freixer, Julian Fierrez, Ruben Vera-Rodriguez, Enrique Carrillo de Santa Pau, Ana Ramírez de Molina, Javier Ortega-Garcia

In addition to the framework, we also provide and describe a unique food image dataset that includes 4, 800 different weekly eating behaviours from 15 different profiles and 1, 200 subjects.

Nutrition

Keystroke Verification Challenge (KVC): Biometric and Fairness Benchmark Evaluation

no code implementations10 Nov 2023 Giuseppe Stragapede, Ruben Vera-Rodriguez, Ruben Tolosana, Aythami Morales, Naser Damer, Julian Fierrez, Javier Ortega-Garcia

Analyzing keystroke dynamics (KD) for biometric verification has several advantages: it is among the most discriminative behavioral traits; keyboards are among the most common human-computer interfaces, being the primary means for users to enter textual data; its acquisition does not require additional hardware, and its processing is relatively lightweight; and it allows for transparently recognizing subjects.

Fairness

Is my Data in your AI Model? Membership Inference Test with Application to Face Images

no code implementations14 Feb 2024 Daniel DeAlcala, Aythami Morales, Gonzalo Mancera, Julian Fierrez, Ruben Tolosana, Javier Ortega-Garcia

This paper introduces the Membership Inference Test (MINT), a novel approach that aims to empirically assess if specific data was used during the training of Artificial Intelligence (AI) models.

Face Recognition

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