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Browsing by Author "Ruiz Fernández, Luis Ángel"

Now showing items 1-20 of 63

A feature extraction software tool for agricultural object-based image analysis

Ruiz Fernández, Luis Ángel; Recio Recio, Jorge Abel; Fernández-Sarría, Alfonso; Hermosilla, T. (Elsevier, 2011-05-01)

A software application for automatic descriptive feature extraction from image-objects, FETEX 2.0, is presented and described in this paper. The input data include a multispectral high resolution digital image and a vector ...
An object-based approach for mapping forest structural types based on low-density LiDAR and multispectral imagery

Ruiz Fernández, Luis Ángel; Recio Recio, Jorge Abel; Crespo-Peremarch, Pablo; Sapena, Marta (Taylor & Francis, 2018)

[EN] Mapping forest structure variables provides important information for the estimation of forest biomass, carbon stocks, pasture suitability or for wildfire risk prevention and control. The optimization of the prediction ...
Analysis of parcel-based image classification methods for monitoring the activities of the Land Bank of Galicia (Spain)

Hermosilla, T.; Díaz Manso, J.M.; Ruiz Fernández, Luis Ángel; Recio Recio, Jorge Abel; Fernández-Sarría, Alfonso; Ferradáns Nogueira, P (Springer Verlag (Germany), 2012-12)

[EN] The abandonment of agricultural plots entails a low economic productivity of the land and a higher vulnerability to wildfires and degradation of affected areas. In this sense, the local government of Galicia is promoting ...
Analysis of spatial correlation in predictive models of forest variables that use LiDAR auxiliary information

Mauro, Francisco; Monleón, V. J.; Temesgen, H.; Ruiz Fernández, Luis Ángel (Canadian Science Publishing, 2017)

[EN] Accounting for spatial correlation of LiDAR model errors can improve the precision of model-based estimators. To estimate spatial correlation, sample designs that provide close observations are needed, but their ...
Analysis of the factors affecting LiDAR DTM accuracy

Estornell Cremades, Javier; Ruiz Fernández, Luis Ángel; Velázquez Martí, Borja; Hermosilla, T. (Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2011)

[EN] The creation of a quality Digital Terrain Model (DTM) is essential for representing and analyzing the Earth in a digital form. The continuous improvements in the acquisition and the potential of airborne Light Detection ...
Analysis of the Influence of Plot Size and LiDAR Density on Forest Structure Attribute Estimates

Ruiz Fernández, Luis Ángel; Hermosilla, T.; Mauro, Francisco; Godino, Miguel (MDPI AG, Basel, Switzerland, 2014)

This paper assesses the combined effect of field plot size and LiDAR density on the estimation of four forest structure attributes: volume, total biomass, basal area and canopy cover. A total of 21 different plot sizes ...
Analyzing the role of pulse density and voxelization parameters on full-waveform LiDAR-derived metrics

Crespo-Peremarch, Pablo; Ruiz Fernández, Luis Ángel; Balaguer-Beser, Ángel; Estornell Cremades, Javier (Elsevier, 2018)

[EN] LiDAR full-waveform (LFW) pulse density is not homogeneous along study areas due to overlap between contiguous flight stripes and, to a lesser extent, variations in height, velocity and altitude of the platform. As a ...
Análisis comparativo de la fragmentación de zonas verdes intraurbanas a partir de cartografía de usos del suelo derivadas de imágenes Sentinel-2. Relación con indicadores de calidad ambiental

Soriano Belda, Inmaculada (2017-10-02)

[EN] The environmental quality in urban areas is an increasingly relevant aspect that requires a follow-up of its evolution. The typological characterization of urban areas as a function of the number, area and spatial ...
Análisis de componentes principales. Aplicaciones en teledetección

Ruiz Fernández, Luis Ángel (2013-07-04)

Fundamentos del método de análisis de componentes principales orientado al análisis de imágenes multiespectrales. Aplicaciones más relevantes en teledetección.
Análisis de los factores que influyen en la precisión de un MDE y estimación de parámetros forestales en zonas arbustivas de montaña mediante datos LiDAR

Estornell Cremades, Javier (2011-09-12)

Los objetivos de esta investigación han sido adaptar un algoritmo basado en procesos iterativos de búsqueda de elevaciones mínimas a partir de datos LiDAR para el cálculo de un MDE en zonas de montaña mediterránea, y ...
Análisis de mezclas espectrales

Ruiz Fernández, Luis Ángel (2016-07-28)

Los métodos de clasificación de imágenes multiespectrales se basan normalmente en la asignación de un valor temático (clase) a cada píxel a partir de sus valores de intensidad en las diferentes bandas espectrales. Sin ...
Análisis de minería de datos para la clasificación de imágenes aéreas

Crespo Peremarch, Pablo (2015-06-17)

[EN] This project tries to improve the land cover classification of aerial images using data mining. A comparison of some data mining techniques is done so as to classify urban and peri-urban areas, using the image ...
ANÁLISIS MULTITEMPORAL DE IMÁGENES DE SATÉLITE DE LA ALBUFERA DE VALENCIA

Navarro Gisbert, Yolanda (2015-05-19)

El Parque Natural de la Albufera constituye uno de los ecosistemas húmedos más importantes de la Comunidad Valenciana y de la cuenca mediterránea. Cuenta con una superficie de 21.120 hectáreas, está situado a 10 Km de ...
Aplicación de datos LiDAR aéreo en la estimación de copas y de variables dendrométricas de árboles frutales

Puig Mengual, Carlos Antonio (2014-12-04)

En este treball es va plantejar i desenrotllar una metodologia per a la delineació i extracció de forma individual de les diferents copes arbòries que es troben situades en l’àmbit de la zona d’estudi per mitjà de dades ...
Assessing contextual descriptive features for plot-based classification of urban areas

Hermosilla, T.; Ruiz Fernández, Luis Ángel; Recio Recio, Jorge Abel; Cambra López, María (Elsevier, 2012-05-15)

A methodology for mapping urban land-use types integrating information from multiple data sources (high spatial resolution imagery, LiDAR data, and cadastral plots) is presented. A large set of complementary descriptive ...
Assessment of factors affecting shrub volume estimations using airborne discrete-return LiDAR data in Mediterranean areas

Estornell Cremades, Javier; Ruiz Fernández, Luis Ángel; Velázquez Martí, Borja; Hermosilla Gómez, Txomin (Society of Photo-optical Instrumentation Engineers (SPIE), 2012)

Shrub vegetation is a key element of Mediterranean forest areas and it is necessary to develop tools that allow a precise knowledge of this vegetation. This study aims to predict shrub volume and analyze the factors affecting ...
Automated extraction of tree and plot-based parameters in citrus orchards from aerial images

Recio Recio, Jorge Abel; Hermosilla, T.; Ruiz Fernández, Luis Ángel; Palomar-Vázquez, Jesús (Elsevier, 2013-01-01)

A plot-based approach is proposed to detect fruit trees from high spatial resolution aerial images and extract tree and plot-based parameters, such as fraction of tree cover, number of trees, and planting patterns. Each ...
Automatic extraction of shorelines from Landsat TM and ETM+ multi-temporal images with subpixel precision

Pardo Pascual, Josep Eliseu; Almonacid Caballer, Jaime; Ruiz Fernández, Luis Ángel; Palomar-Vázquez, Jesús (Elsevier, 2012-08)

A high precision geometric method for automated shoreline detection from Landsat TM and ETM+ imagery is presented. The methodology is based on the application of an algorithm that ensures accurate image geometric registration ...
CARACTERIZACIÓN DEL CICLO DEL CULTIVO DEL ARROZ EN L’ALBUFERA DE VALENCIA MEDIANTE IMÁGENES LANDSAT.

Gómez Jiménez, José Manuel (2015-05-25)

Con el presente trabajo se persigue un triple objetivo. En primer lugar, se pretende realizar un proceso completo en el ámbito de la teledetección, partiendo de cero, y realizando todas las fases importantes que conlleva ...
Catalogación de rutas de montaña en el Pirineo Central mediante datos georreferenciados y técnicas SIG

Moll Romeu, Kevin (2019-09-25)

[ES] Se realiza un inventario de rutas de montaña en la zona del Pirineo Central mediante estudio bibliográfico y de campo, adquisición, preprocesado y combinación de datos georreferenciados (MDT, imágenes Sentinel 2, ...