Search Results for author: Marcos Faundez-Zanuy

Found 60 papers, 0 papers with code

Face recognition with small and large size databases

no code implementations16 Apr 2022 Josep Roure-Alcobé, Marcos Faundez-Zanuy

This paper presents experimental results using the ORL (40 people) and FERET (994 people) databases.

Face Recognition

Biometric verification of humans by means of hand geometry

no code implementations16 Apr 2022 Marcos Faundez-Zanuy

This paper describes a hand geometry biometric identification system.

Study of a committee of neural networks for biometric hand-geometry recognition

no code implementations8 Apr 2022 Marcos Faundez-Zanuy

This Paper studies different committees of neural networks for biometric pattern recognition.

Face recognition in a transformed domain

no code implementations6 Apr 2022 Marcos Faundez-Zanuy

This paper proposes the use of a discrete cosine transform (DCT) instead of the eigenfaces method (Karhunen-Loeve Transform) for biometric identification based on frontal face images.

Face Recognition

Face identification by means of a neural net classifier

no code implementations1 Apr 2022 Virginia Espinosa-Duro, Marcos Faundez-Zanuy

This paper describes a novel face identification method that combines the eigenfaces theory with the Neural Nets.

Face Identification

Contributions to interframe coding

no code implementations31 Mar 2022 Marcos Faundez-Zanuy, Francesc Vallverdu-Bayes, Francesc Tarres-Ruiz

Advanced motion models (4 or 6 parameters) are needed for a good representation of the motion experimented by the different objects contained in a sequence of images.

Contribution of the Temperature of the Objects to the Problem of Thermal Imaging Focusing

no code implementations30 Mar 2022 Virginia Espinosa-Duró, Marcos Faundez-Zanuy, Jiri Mekyska

When focusing an image, depth of field, aperture and distance from the camera to the object, must be taking into account, both, in visible and in infrared spectrum.

A Naturalistic Database of Thermal Emotional Facial Expressions and Effects of Induced Emotions on Memory

no code implementations29 Mar 2022 Anna Esposito, Vincenzo Capuano, Jiri Mekyska, Marcos Faundez-Zanuy

This work defines a procedure for collecting naturally induced emotional facial expressions through the vision of movie excerpts with high emotional contents and reports experimental data ascertaining the effects of emotions on memory word recognition tasks.

On handwriting pressure normalization for interoperability of different acquisition stylus

no code implementations28 Mar 2022 Marcos Faundez-Zanuy, Olga Brotons-Rufes, Carles Paul-Recarens, Réjean Plamondon

In this paper, we present a pressure characterization and normalization procedure for online handwritten acquisition.

On the Handwriting Tasks' Analysis to Detect Fatigue

no code implementations28 Mar 2022 Manuel-Vicente Garnacho-Castaño, Marcos Faundez-Zanuy, Josep Lopez-Xarbau

Practical determination of physical recovery after intense exercise is a challenging topic that must include mechanical aspects as well as cognitive ones because most of physical sport activities, as well as professional activities (including brain computer interface-operated systems), require good shape in both of them.

Reliability and Validity of the Polar V800 Sports Watch for Estimating Vertical Jump Height

no code implementations28 Mar 2022 Manuel-Vicente Garnacho-Castaño, Marcos Faundez-Zanuy, Noemi Serra-Payá, J. L. Maté-Muñoz, Josep López-Xarbau, M. Vila-Blanch

There was almost perfect agreement between the Polar V800 compared to a force platform for the SJ and CMJ tests (Mean ICCs = 0. 95; no systematic bias +- random errors in SJ mean: -0. 38 +- 2. 10 cm, p > 0. 05).

Fast on-line signature recognition based on VQ with time modeling

no code implementations23 Mar 2022 Juan-Manuel Pascual-Gaspar, Marcos Faundez-Zanuy, Carlos Vivaracho

Experimental results with MCYT provide a 99. 76% identification rate and 2. 46% EER (skilled forgeries and individual threshold).

Quantization

Perceptual Features as Markers of Parkinson's Disease: The Issue of Clinical Interpretability

no code implementations21 Mar 2022 Jiri Mekyska, Zdenek Smekal, Zoltan Galaz, Zdenek Mzourek, Irena Rektorova, Marcos Faundez-Zanuy, Karmele Lopez-de-Ipina

Up to 90% of patients with Parkinson's disease (PD) suffer from hypokinetic dysathria (HD) which is also manifested in the field of phonation.

Multi-class versus One-class classifier in spontaneous speech analysis oriented to Alzheimer Disease diagnosis

no code implementations21 Mar 2022 K. López-de-Ipiña, Marcos Faundez-Zanuy, Jordi Solé-Casals, Fernando Zelarin, Pilar Calvo

Most of medical developments require the ability to identify samples that are anomalous with respect to a target group or control group, in the sense they could belong to a new, previously unseen class or are not class data.

One-class classifier

Contribution of Different Handwriting Modalities to Differential Diagnosis of Parkinson's Disease

no code implementations18 Mar 2022 Peter Drotár, Jiří Mekyska, Zdeněk Smékal, Irena Rektorová, Lucia Masarová, Marcos Faundez-Zanuy

We show that pressure and in-air movement also possess information that is relevant for the diagnosis of Parkinson's Disease (PD) from handwriting.

Gender classification by means of online uppercase handwriting: A text-dependent allographic approach

no code implementations18 Mar 2022 Enric Sesa-Nogueras, Marcos Faundez-Zanuy, Josep Roure-Alcobé

Although in this case results are not conclusive, an outstanding average of 74% of well classified writers is obtained when information from pen-up strokes is combined with information from pen-down ones.

Classification

Identification of Hypokinetic Dysarthria Using Acoustic Analysis of Poem Recitation

no code implementations18 Mar 2022 Jan Mucha, Zoltan Galaz, Jiri Mekyska, Tomas Kiska, Vojtech Zvoncak, Zdenek Smekal, Ilona Eliasova, Martina Mrackova, Milena Kostalova, Irena Rektorova, Marcos Faundez-Zanuy, Jesus B. Alonso-Hernandez

In this work, we analysed the power of conventional speech features quantifying imprecise articulation, dysprosody, speech dysfluency and speech quality deterioration extracted from a specialized poem recitation task to discriminate dysarthric and healthy speech.

Classification

Multi-focus thermal image fusion

no code implementations16 Mar 2022 Radek Benes, Pavel Dvorak, Marcos Faundez-Zanuy, Virginia Espinosa-Duro, Jiri Mekyska

To the best of our knowledge, this is the first work devoted to multi-focus thermal image fusion.

On the focusing of thermal images

no code implementations15 Mar 2022 Marcos Faundez-Zanuy, Jiří Mekyska, Virginia Espinosa-Duro

In this paper we present a new thermographic image database suitable for the analysis of automatic focus measures.

Preliminary experiments on automatic gender recognition based on online capital letters

no code implementations11 Mar 2022 Marcos Faundez-Zanuy, Enric Sesa-Nogueras

In this paper we present some experiments to automatically classify online handwritten text based on capital letters.

A multimodal approach for Parkinson disease analysis

no code implementations10 Mar 2022 Marcos Faundez-Zanuy, Antonio Satue-Villar, Jiri Mekyska, Viridiana Arreola, Pilar Sanz, Carles Paul, Luis Guirao, Mateu Serra, Laia Rofes, Pere Clavé, Enric Sesa-Nogueras, Josep Roure

Parkinson's disease (PD) is the second most frequent neurodegenerative disease with prevalence among general population reaching 0. 1-1 %, and an annual incidence between 1. 3-2. 0/10000 inhabitants.

HAIDA: Biometric technological therapy tools for neurorehabilitation of Cognitive Impairment

no code implementations9 Mar 2022 Elsa Fernandez, Jordi Sole-Casals, Pilar M. Calvo, Marcos Faundez-Zanuy, Karmele Lopez-de-Ipina

Dementia, and specially Alzheimer s disease (AD) and Mild Cognitive Impairment (MCI) are one of the most important diseases suffered by elderly population.

A Preliminary Study on Aging Examining Online Handwriting

no code implementations8 Mar 2022 Marcos Faundez-Zanuy, Enric Sesa-Nogueras, Josep Roure-Alcobé, Anna Esposito, Jiri Mekyska, Karmele López-de-Ipiña

This paper contributes to this research line analyzing a selected set of online handwriting parameters provided by a healthy group of population aged from 18 to 70 years.

Digital Speech Algorithms for Speaker De-Identification

no code implementations8 Mar 2022 Stefano Marinozzi, Marcos Faundez-Zanuy

The present work is based on the COST Action IC1206 for De-identification in multimedia content.

De-identification

Non-linear predictive vector quantization of speech

no code implementations7 Mar 2022 Marcos Faundez-Zanuy

In this paper we propose a Non-Linear Predictive Vector quantizer (PVQ) for speech coding, based on Multi-Layer Perceptrons.

Quantization

Speaker recognition by means of a combination of linear and nonlinear predictive models

no code implementations7 Mar 2022 Marcos Faundez-Zanuy

This paper deals the combination of nonlinear predictive models with classical LPCC parameterization for speaker recognition.

Speaker Recognition

A comparative study of several ADPCM schemes with linear and nonlinear prediction

no code implementations7 Mar 2022 Oscar Oliva, Marcos Faundez-Zanuy

In this paper we compare several ADPCM schemes with nonlinear prediction based on neural nets with the classical ADPCM schemes based on several linear prediction schemes.

Quantization

On the relevance of language in speaker recognition

no code implementations4 Mar 2022 Antonio Satue-Villar, Marcos Faundez-Zanuy

This paper presents a new database collected from a bilingual speakers set (49), in two different languages: Spanish and Catalan.

Quantization Speaker Recognition

Nonlinear predictive models computation in ADPCM schemes

no code implementations3 Mar 2022 Marcos Faundez-Zanuy

Recently several papers have been published on nonlinear prediction applied to speech coding.

Speech segmentation using multilevel hybrid filters

no code implementations24 Feb 2022 Marcos Faundez-Zanuy, Francesc Vallverdu-Bayes

A novel approach for speech segmentation is proposed, based on Multilevel Hybrid (mean/min) Filters (MHF) with the following features: An accurate transition location.

Applying multi-angled parallelism to Spanish topographical maps

no code implementations24 Feb 2022 Josep-Maria Cusco, Marcos Faundez-Zanuy

Multi-Angled Parallelism (MAP) is a method to recognize lines in binary images.

Interblock redundancy reduction using QUADTREES

no code implementations24 Feb 2022 Marcos Faundez-Zanuy, Xavi Domingo-Reguant

This paper applies the quadtree structure for image coding.

A comparative study of several parameterizations for speaker recognition

no code implementations24 Feb 2022 Marcos Faundez-Zanuy

This paper presents an exhaustive study about the robustness of several parameterizations, in speaker verification and identification tasks.

Quantization Speaker Recognition +1

N-dimensional nonlinear prediction with MLP

no code implementations24 Feb 2022 Marcos Faundez-Zanuy

In this paper we propose a Non-Linear Predictive Vector quantizer (PVQ) for speech coding, based on Multi-Layer Perceptrons.

A new face database simultaneously acquired in visible, near infrared and thermal spectrum

no code implementations24 Feb 2022 Virginia Espinosa-Duró, Marcos Faundez-Zanuy, Jiří Mekyska

In this paper we present a new database acquired with three different sensors (visible, near infrared and thermal) under different illumination conditions.

Online handwriting, signature and touch dynamics: tasks and potential applications in the field of security and health

no code implementations24 Feb 2022 Marcos Faundez-Zanuy, Jiri Mekyska, Donato Impedovo

Background: An advantageous property of behavioural signals , e. g. handwriting, in contrast to morphological ones, such as iris, fingerprint, hand geometry, etc., is the possibility to ask a user for a very rich amount of different tasks.

Handwriting Biometrics: Applications and Future Trends in e-Security and e-Health

no code implementations24 Feb 2022 Marcos Faundez-Zanuy, Julian Fierrez, Miguel A. Ferrer, Moises Diaz, Ruben Tolosana, Réjean Plamondon

Background- This paper summarizes the state-of-the-art and applications based on online handwritting signals with special emphasis on e-security and e-health fields.

ADPCM with nonlinear prediction

no code implementations24 Feb 2022 Marcos Faundez-Zanuy, Oscar Oliva-Suarez

Many speech coders are based on linear prediction coding (LPC), nevertheless with LPC is not possible to model the nonlinearities present in the speech signal.

Biometric recognition: why not massively adopted yet?

no code implementations23 Feb 2022 Marcos Faundez-Zanuy

Although there has been a dramatically reduction on the prices of capturing devices and an increase on computing power in the last decade, it seems that biometric systems are still far from massive adoption for civilian applications.

Speaker recognition improvement using blind inversion of distortions

no code implementations23 Feb 2022 Marcos Faundez-Zanuy, Jordi Sole-Casals

In this paper we propose the inversion of nonlinear distortions in order to improve the recognition rates of a speaker recognizer system.

Speaker Recognition

Technological evaluation of two AFIS systems

no code implementations23 Feb 2022 Marcos Faundez-Zanuy

This paper provides a technological evaluation of two Automatic Fingerprint Identification Systems (AFIS) used in forensic applications.

State-of-the-art in speaker recognition

no code implementations23 Feb 2022 Marcos Faundez-Zanuy, Enric Monte-Moreno

Recent advances in speech technologies have produced new tools that can be used to improve the performance and flexibility of speaker recognition While there are few degrees of freedom or alternative methods when using fingerprint or iris identification techniques, speech offers much more flexibility and different levels for performing recognition: the system can force the user to speak in a particular manner, different for each attempt to enter.

Speaker Recognition

On-line signature verification system with failure to enroll managing

no code implementations23 Feb 2022 Joan Fabregas, Marcos Faundez-Zanuy

This context corresponds to a real operation, where a new user tries to enroll an existing system and must be automatically guided by the system in order to detect the failure to enroll situations.

A comparative study of in-air trajectories at short and long distances in online handwriting

no code implementations23 Feb 2022 Carlos Alonso-Martinez, Marcos Faundez-Zanuy, Jiri Mekyska

Methods In this paper, we will analyze a large set of databases (BIOSECURID, EMOTHAW, PaHaW, Oxygen-Therapy and SALT), which contain a total amount of 663 users and 17951 files.

A modification of the conjugate direction method for motion estimation

no code implementations23 Feb 2022 Marcos Faundez-Zanuy, Francesc Tarres-Ruiz

The performance of block matching methods has been measured in terms of the entropy in the error signal between the motion compensated and the original frames.

Motion Estimation

Privacy issues on biometric systems

no code implementations23 Feb 2022 Marcos Faundez-Zanuy

In the XXIth century there is a strong interest on privacy issues.

Testing report of a fingerprint-based door-opening system

no code implementations23 Feb 2022 Marcos Faundez-Zanuy, Joan Fabregas

This paper describes the operational evaluation of a door-opening system based on a low-cost inkless fingerprint sensor.

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Biometric security technology

no code implementations23 Feb 2022 Marcos Faundez-Zanuy

This paper presents an overview of the main topics related to biometric security technology, with the main purpose to provide a primer on this subject.

Thermal hand image segmentation for biometric recognition

no code implementations23 Feb 2022 Xavier Font-Aragones, Marcos Faundez-Zanuy, Jiri Mekyska

In this paper we present a method to identify people by means of thermal (TH) and visible (VIS) hand images acquired simultaneously with a TESTO 882-3 camera.

Dimensionality Reduction Semantic Segmentation

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