Now showing items 1-20 of 29

    • 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) ...
    • Attention to product images in an online retailing store: an eye-tracking study considering consumer goals and type of product 

      Chocarro Eguaras, Raquel Upna Orcid; Cortiñas Ugalde, Mónica Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (California State University Press, 2022)   Artículo / Artikulua  OpenAccess
      The visual content of the product area is crucial in an e-commerce site. This paper studies the differences in attention to product images in the product area in e-commerce sites considering the effects of purchase stage ...
    • Contributions of artificial intelligence to low resolution renal multiparametric magnetic resonance analysis 

      Oyarzun Domeño, Anne; Villanueva Larre, Arantxa Upna Orcid (2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Arterial spin labeling (ASL), is a Multiparametric Magnetic Resonance Imaging (MRI) technique used to quantify and evaluate Renal Blood Flow (RBF) and detect perfusion failure by labelling blood water as it flows throughout ...
    • 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) ...
    • 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 ...
    • Image, brand and price info: do they always matter the same? 

      Cortiñas Ugalde, Mónica Upna Orcid; Chocarro Eguaras, Raquel Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (Association for Computing Machinery (ACM), 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We study attention processes to brand, price and visual information about products in online retailing websites, simultaneously considering the effects of consumers’ goals, purchase category and consumers’ statements. We ...
    • An image-based framework for the analysis of the murine microvasculature: from tissue clarification to computational hemodynamics 

      Mañosas Sánchez, Santiago; Sanz Muñoz, Aritz; Ederra, Cristina; Urbiola, Ainhoa; Rojas De Miguel, Elvira; Ostiz, Ainhoa; Cortés-Domínguez, Iván; Ramírez, Natalia; Ortíz-de-Solórzano, Carlos; Villanueva Larre, Arantxa Upna Orcid; Malvè, Mauro Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      The blood–brain barrier is a unique physiological structure acting as a filter for every molecule reaching the brain through the blood. For this reason, an effective pharmacologic treatment supplied to a patient by ...
    • 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 ...

      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).
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