Listar por autor UPNA "Cabeza Laguna, Rafael"

Mostrando ítems 1-20 de 25

    • Accurate pupil center detection in off-the-shelf eye tracking systems using convolutional neural networks 

      Larumbe Bergera, Andoni Upna Orcid; Garde Lecumberri, Gonzalo Upna; Porta Cuéllar, Sonia Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Remote eye tracking technology has suffered an increasing growth in recent years due to its applicability in many research areas. In this paper, a video-oculography method based on convolutional neural networks (CNNs) for ...

    • Attention to online channels across the path to purchase: an eye-tracking study 

      Cortiñas Ugalde, Mónica Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Chocarro Eguaras, Raquel Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (Elsevier, 2019)   Artículo / Artikulua  OpenAccess
      Currently, consumers display what is known as omnichannel behavior: the combined use of digital and physical channels providing them with multiple points of contact with firms. We combine the stimulus-organism-response (S-O-R) ...

    • Contributions to Head Pose Estimation methods 

      Ariz Galilea, Mikel Upna (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Head Pose Estimation (HPE) is currently a growing research field, mainly because of the proliferation of human-computer interfaces (HCI) in the last decade. It offers a wide variety of applications, including driver ...

    • Development of a prediction protocol for the screening of metabolic associated fatty liver disease in children with overweight or obesity 

      Osés Recalde, Maddi Upna Orcid; Cadenas-Sánchez, Cristina Upna Orcid; Medrano Echeverría, María Upna Orcid; Galbete Jiménez, Arkaitz Upna Orcid; Miranda Ferrúa, Emiliano; Ruiz, Jonatan R.; Sánchez-Valverde, Felix; Ortega, Francisco B.; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Idoate, Fernando; Labayen Goñi, Idoia Upna Orcid (Wiley, 2022)   Artículo / Artikulua  OpenAccess
      Background: the early detection and management of children with metabolic associ-ated fatty liver disease (MAFLD) is challenging. Objective: to develop a non-invasive and accurate prediction protocol for the identi-fication ...

    • Differences in specific abdominal fat depots between metabolically healthy and unhealthy children with overweight/obesity: the role of cardiorespiratory fitness 

      Cadenas-Sánchez, Cristina Upna Orcid; Medrano Echeverría, María Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Idoate, Fernando; Osés Recalde, Maddi Upna Orcid; Rodríguez Vigil, Beatriz; Álvarez de Eulate, Natalia; Alberdi Aldasoro, Nerea; Ortega, Francisco B.; Labayen Goñi, Idoia Upna Orcid (Wiley, 2023)   Artículo / Artikulua  OpenAccess
      Objectives: Fat depots localization has a critical role in the metabolic health status of adults. Nevertheless, whether that is also the case in children remains under- studied. Therefore, the aims of this study were: (i) ...

    • Diseño y aplicaciones de un elemento activo universal 

      Cabeza Laguna, Rafael Upna Orcid (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 1996)   Tesis doctoral / Doktoretza tesia  OpenAccess
      La lista de elementos activos presentes en el comienzo de la década de los noventa es numerosa y no exenta de repeticiones o conceptos poco útiles. Por otra parte no se presenta en la literatura ningún esfuerzo a la hora ...

    • The effect of a multicomponent intervention on steatosis is partially mediated by the reduction of intermuscular abdominal adipose tissue in children with overweight or obesity: the EFIGRO Project 

      Cadenas-Sánchez, Cristina Upna Orcid; Idoate, Fernando; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Rodríguez Vigil, Beatriz; Medrano Echeverría, María Upna Orcid; Osés Recalde, Maddi Upna Orcid; Ortega, Francisco B.; Ruiz, Jonatan R.; Labayen Goñi, Idoia Upna Orcid (American Diabetes Association, 2022)   Artículo / Artikulua  OpenAccess
      OBJECTIVE: In adults, there is evidence that improvement of metabolic-associated fatty liver disease (MAFLD) depends on the reduction of myosteatosis. In children, in whom the prevalence of MAFLD is alarming, this muscle-liver ...

    • Effects of a family-based lifestyle intervention plus supervised exercise training on abdominal fat depots in children with overweight or obesity: a secondary analysis of a nonrandomized clinical trial 

      Cadenas-Sánchez, Cristina Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Idoate, Fernando; Osés Recalde, Maddi Upna Orcid; Medrano Echeverría, María Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Arenaza, Lide Upna Orcid; Sanz Muñoz, Aritz; Ortega, Francisco B.; Ruiz, Jonatan R.; Labayen Goñi, Idoia Upna Orcid (American Medical Association, 2022)   Artículo / Artikulua  OpenAccess
      Importance Excess abdominal fat is a major determinant in the development of insulin resistance and other metabolic disorders. Increased visceral adipose tissue (VAT) seems to precede the development of insulin resistance ...

    • Evaluation of accurate eye corner detection methods for gaze estimation 

      Bengoechea Irañeta, José Javier Upna; Cerrolaza Martínez, Juan José Upna; Villanueva Larre, Arantxa Upna Orcid; Cabeza Laguna, Rafael Upna Orcid (Bern Open Publishing, 2014)   Artículo / Artikulua  OpenAccess
      Accurate detection of iris center and eye corners appears to be a promising approach for low cost gaze estimation. In this paper we propose novel eye inner corner detection methods. Appearance and feature based segmentation ...

    • Fast and robust ellipse detection algorithm for head-mounted eye tracking systems 

      Martinikorena Aranburu, Ion Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Urtasun, Iñaki; Larumbe Bergera, Andoni Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      In head-mounted eye tracking systems, the correct detection of pupil position is a key factor in estimating gaze direction. However, this is a challenging issue when the videos are recorded in real-world conditions, due ...

    • Fisiopatología y técnicas de registro de los movimientos oculares 

      Gila Useros, Luis; Villanueva Larre, Arantxa Upna Orcid; Cabeza Laguna, Rafael Upna Orcid (Gobierno de Navarra, 2009)   Artículo / Artikulua  OpenAccess
      En el control de la motilidad ocular intervienen varios sistemas funcionales. Los reflejos vestíbulo-oculares y optocinéticos son respuestas automáticas para compensar los movimientos de la cabeza y del entorno visual y ...

    • Gaze estimation problem tackled through synthetic images 

      Garde Lecumberri, Gonzalo Upna; Larumbe Bergera, Andoni Upna Orcid; Bossavit, Benoît Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Porta Cuéllar, Sonia Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (Association for Computing Machinery (ACM), 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we evaluate a synthetic framework to be used in the field of gaze estimation employing deep learning techniques. The lack of sufficient annotated data could be overcome by the utilization of a synthetic ...

    • Gaze tracking system model based on physical parameters 

      Villanueva Larre, Arantxa Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Porta Cuéllar, Sonia Upna Orcid (World Scientific Publishing, 2007)   Artículo / Artikulua  OpenAccess
      In the past years, research in eye tracking development and applications has attracted much attention and the possibility of interacting with a computer employing just gaze information is becoming more and more feasible. ...

    • Hybrid method based on topography for robust detection of iris center and eye corners 

      Villanueva Larre, Arantxa Upna Orcid; Ponz Sarvisé, Victoria; Sesma Sánchez, Laura Upna; Ariz Galilea, Mikel Upna; Porta Cuéllar, Sonia Upna Orcid; Cabeza Laguna, Rafael Upna Orcid (ACM (Association for Computing Machinery), 2013)   Artículo / Artikulua  OpenAccess
      A multi-stage procedure to detect eye features is presented. Multiresolution and topographic classification are used to detect the iris center. The eye corner is calculated combining valley detection and eyelid curve ...

    • Improved strategies for HPE employing learning-by-synthesis approaches 

      Larumbe Bergera, Andoni Upna Orcid; Ariz Galilea, Mikel Upna; Bengoechea Irañeta, José Javier Upna; Segura, Rubén; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The first contribution of this paper is the presentation of a synthetic video database where the groundtruth of 2D facial landmarks and 3D head poses is available to be used for training and evaluating Head Pose Estimation ...

    • Introducing I2Head database 

      Martinikorena Aranburu, Ion Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid; Porta Cuéllar, Sonia Upna Orcid (ACM (Association for Computing Machinery), 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      I2Head database has been created with the aim to become an optimal reference for low cost gaze estimation. It exhibits the following outstanding characteristics: it takes into account key aspects of low resolution eye ...

    • Low cost gaze estimation: knowledge-based solutions 

      Martinikorena Aranburu, Ion Upna Orcid; Larumbe Bergera, Andoni Upna Orcid; Ariz Galilea, Mikel Upna; Porta Cuéllar, Sonia Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      Eye tracking technology in low resolution scenarios is not a completely solved issue to date. The possibility of using eye tracking in a mobile gadget is a challenging objective that would permit to spread this technology ...

    • Low-cost eye tracking calibration: a knowledge-based study 

      Garde Lecumberri, Gonzalo Upna; Larumbe Bergera, Andoni Upna Orcid; Bossavit, Benoît Upna Orcid; Porta Cuéllar, Sonia Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Subject calibration has been demonstrated to improve the accuracy in high-performance eye trackers. However, the true weight of calibration in off-the-shelf eye tracking solutions is still not addressed. In this work, a ...

    • Models for gaze tracking systems 

      Villanueva Larre, Arantxa Upna Orcid; Cabeza Laguna, Rafael Upna Orcid (Hindawi Publishing Corporation, 2007)   Artículo / Artikulua  OpenAccess
      One of the most confusing aspects that one meets when introducing oneself into gaze tracking technology is the wide variety, in terms of hardware equipment, of available systems that provide solutions to the same matter, ...

    • Optimizing interoperability between video-oculographic and electromyographic systems 

      Navallas Irujo, Javier Upna Orcid; Ariz Galilea, Mikel Upna; Villanueva Larre, Arantxa Upna Orcid; San Agustín, Javier; Cabeza Laguna, Rafael Upna Orcid (Rehabilitation Research & Development Service, 2011)   Artículo / Artikulua  OpenAccess
      A new system is presented that enhances the interoperability between a video-oculographic (VOG) system for mouse movement control and an electromyographic (EMG) system for mouse click detection. The proposed VOG-EMG system ...
      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
      Logo MinisterioLogo Fecyt

      Contacto | Sugerencias