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Browsing by Author "Pérez Cortés, Juan Carlos"

Now showing items 1-20 of 24

A Deep Learning Framework to classify Breast Density with Noisy Labels Regularization

López-Almazán, Héctor; Perez-Benito, Francisco Javier; Larroza, Andrés; Perez-Cortes, Juan-Carlos; Pollán, Marina; Perez-Gomez, Beatriz; Salas-Trejo, Dolores; Casals, María; Llobet Azpitarte, Rafael (Elsevier, 2022-06-01)

[EN] Background and Objective: Breast density assessed from digital mammograms is a biomarker for higher risk of developing breast cancer. Experienced radiologists assess breast density using the Breast Image and Data ...
A deep learning system to obtain the optimal parameters for a threshold-based breast and dense tissue segmentation

Perez-Benito, Francisco Javier; Signol, François; Perez-Cortes, Juan-Carlos; Fuster Bagetto, Alejandro; Pollan, Marina; Pérez-Gómez, Beatriz; Salas-Trejo, Dolores; Casals, Maria; Martínez, Inmaculada; Llobet Azpitarte, Rafael (Elsevier, 2020-10)

[EN] Background and Objective: Breast cancer is the most frequent cancer in women. The Spanish healthcare network established population-based screening programs in all Autonomous Communities, where mammograms of asymptomatic ...
Alignment and Improvement of Shape-From-Silhouette Reconstructed 3D Objects

Pérez Jiménez, Alberto José; Perez-Soler, Javier; Perez-Cortes, Juan-Carlos; Guardiola Garcia, Jose Luis (Institute of Electrical and Electronics Engineers, 2024)

[EN] 3D object alignment is essential in multiple fields. For instance, to allow precise measurements in metrology, to perform surface/volumetric checks or quality control in industrial inspection, to align partial captures ...
Aplicaciones de los autómatas transductores finitos con pesos (WFST) en la corrección simbólica en interfaces persona-máquina

Navarro Cerdán, José Ramón (Universitat Politècnica de València, 2016-04-18)

[EN] In this thesis a real application related to the string correction process from an OCR classifier in a form digitizing task is presented. These strings come from a classifier with a given error ratio that implies that ...
Batch-adaptive rejection threshold estimation with application to OCR post-processing

Navarro Cerdán, José Ramón; Arlandis Navarro, Joaquim Francesc; Llobet Azpitarte, Rafael; Perez-Cortes, Juan-Carlos (Elsevier, 2015-06-24)

An OCR process is often followed by the application of a language model to find the best transformation of an OCR hypothesis into a string compatible with the constraints of the document, field or item under consideration. ...
Bias Analysis on Public X-Ray Image Datasets of Pneumonia and COVID-19 Patients

Omar del Tejo Catalá; Salvador Igual, Ismael; Perez-Benito, Francisco Javier; Millan-Escriva, David; ORTIZ, V.; Llobet Azpitarte, Rafael; Perez-Cortes, Juan-Carlos (Institute of Electrical and Electronics Engineers, 2021)

[EN] Chest X-ray images are useful for early COVID-19 diagnosis with the advantage that X-ray devices are already available in health centers and images are obtained immediately. Some datasets containing X-ray images with ...
Breast Dense Tissue Segmentation with Noisy Labels: A Hybrid Threshold-Based and Mask-Based Approach

Larroza, Andrés; Pérez-Benito, Francisco Javier; Perez-Cortes, Juan-Carlos; Román, Marta; Pollán, Marina; Pérez-Gómez, Beatriz; Salas-Trejo, Dolores; Casals, María; Llobet Azpitarte, Rafael (MDPI AG, 2022-08)

[EN] Breast density assessed from digital mammograms is a known biomarker related to a higher risk of developing breast cancer. Supervised learning algorithms have been implemented to determine this. However, the performance ...
Clasificación y detección de errores en piezas para inspección industrial

Del Tejo Catalá, Omar (Universitat Politècnica de València, 2020-06-23)

[ES] Se presenta una comparativa entre distintos métodos para la extracción de características de un conjunto de piezas industriales. El objetivo de estas características es entrenar un algoritmo de clasificación con rechazo ...
Composition of Constraint, Hypothesis and Error Models to improve interaction in Human-Machine Interfaces

Navarro Cerdán, José Ramón; Llobet Azpitarte, Rafael; Arlandis, Joaquim; Perez-Cortes, Juan-Carlos (Elsevier, 2016-05)

We use Weighted Finite-State Transducers (WFSTs) to represent the different sources of information available: the initial hypotheses, the possible errors, the constraints imposed by the task (interaction language) and the ...
Decision support through risk cost estimation in 30-day hospital unplanned readmission

Arnal-Benedicto, Laura; Pons-Suñer, Pedro; Navarro Cerdan, José Ramón; Ruiz Valls, Pablo; Caballero Mateos, Mª Jose; Valdivieso Martínez, Bernardo; Perez-Cortes, Juan-Carlos (Public Library of Science, 2022-07-15)

[EN] Unplanned hospital readmissions mean a significant burden for health systems. Accurately estimating the patient's readmission risk could help to optimise the discharge decision-making process by smartly ordering ...
Desarrollo de un sistema software de etiquetado para aplicaciones GD&T (Geometric Dimensioning and Tolerancing)

Vañó Cerdá, Juan (Universitat Politècnica de València, 2017-05-19)

The project is aimed at the development of a labeling software module for Geometric Dimensioning and Tolerancing (GD&T) in 2D and 3D technical drawings. The main contributions of this software are: Allows the GD&T ...
Despliegue automatizado y seguro de sistemas en planta para el diagnóstico, gestión y administración remotas

Alcañiz Marco, Javier (Universitat Politècnica de València, 2017-04-25)

[ES] El uso de sistemas Linux está cada vez más presente en el día a día de las personas y aunque esto no se vea reflejado en el uso doméstico de los ordenadores, Linux es el sistema operativo más utilizado como servidor ...
Estudio de viabilidad del sistema Zero Gravity 3D

Salazar de Gurendes Angulo, Mikel (Universitat Politècnica de València, 2021-09-16)

[ES] Este trabajo presenta un sistema de inspección de calidad mediante visión 3D que desarrolla el ITI (Instituto Tecnológico de Informática). Describe el proceso de validación, mediante un estudio de viabilidad, de una ...
Extended a Priori Probability (EAPP): A Data-Driven Approach for Machine Learning Binary Classification Tasks

ORTIZ, V.; Pérez-Benito, Francisco Javier; del Tejo Catalá, Omar; Salvador Igual, Ismael; Llobet Azpitarte, Rafael; Perez-Cortes, Juan-Carlos (Institute of Electrical and Electronics Engineers, 2022-11-14)

[EN] The a priori probability of a dataset is usually used as a baseline for comparing a particular algorithm's accuracy in a given binary classification task. ZeroR is the simplest algorithm for this, predicting the ...
Global parenchymal texture features based on histograms of oriented gradients improve cancer development risk estimation from healthy breasts

Pérez-Benito, Francisco Javier; Signol, François; Perez-Cortes, Juan-Carlos; Pollán, Marina; Perez-Gómez, Beatriz; Salas-Trejo, Dolores; Casals, María; Martinez, Inmaculada; Llobet Azpitarte, Rafael (Elsevier, 2019-08)

[EN] Background The breast dense tissue percentage on digital mammograms is one of the most commonly used markers for breast cancer risk estimation. Geometric features of dense tissue over the breast and the presence of ...
High-Profile VRU Detection on Resource-Constrained Hardware Using YOLOv3/v4 on BDD100K

ORTIZ, V.; Salvador Igual, Ismael; Del Tejo Catalá, Omar; Perez-Cortes, Juan-Carlos (MDPI AG, 2020-12)

[EN] Vulnerable Road User (VRU) detection is a major application of object detection with the aim of helping reduce accidents in advanced driver-assistance systems and enabling the development of autonomous vehicles. Due ...
I3D, un sistema de inspección industrial 3D sin contacto

Salvador Igual, Ismael; Carrión Robles, Diego; Perez-Cortes, Juan-Carlos; Sáez Barona, Sergio (Instituto Tecnológico de Informática, 2011-09)
Improving Multi-View Camera Calibration Using Precise Location of Sphere Center Projection

Pérez Jiménez, Alberto José; Pérez-Soler, Javier; Perez-Cortes, Juan-Carlos; Guardiola Garcia, Jose Luis (MDPI AG, 2022-06)

[EN] Several calibration algorithms use spheres as calibration tokens because of the simplicity and uniform shape that a sphere presents across multiple views, along with the simplicity of its construction. Among the ...
Probabilistic Evaluation of 3D Surfaces Using Statistical Shape Models (SSM)

Pérez, Javier; Guardiola Garcia, Jose Luis; Pérez Jiménez, Alberto José; Perez-Cortes, Juan-Carlos (MDPI AG, 2020-11)

[EN] Inspecting a 3D object which shape has elastic manufacturing tolerances in order to find defects is a challenging and time-consuming task. This task usually involves humans, either in the specification stage followed ...
Probabilistic Pose Estimation From Multiple Hypotheses

del Tejo Catalá, Omar; Guardiola Garcia, Jose Luis; Pérez, Javier; Millan-Escriva, David; Pérez Jiménez, Alberto José; Perez-Cortes, Juan-Carlos (Institute of Electrical and Electronics Engineers, 2023)

[EN] Pose estimation assesses the 6D pose of one or many objects in a scene. Considerable attention has been dedicated to the advancement of pose estimation algorithms capable of identifying the orientation of multiple ...