Francisco Javier Melero

University of Granada | UGR · Departamento de Lenguajes y Sistemas Informáticos

Las nuevas tecnologías forman parte imprescindible de la difusión del patrimonio arqueológico, y mucho más en la era post-COVID19. Así, los destinos turísticos deben adaptarse al nuevo perfil de los visitantes, más exigentes en cuanto a experiencia, información y sobre todo, seguridad sanitaria. De esta forma, vemos de especial importancia aplicar...

The combination of convolutional and recurrent neural networks is a promising framework. This arrangement allows the extraction of high-quality spatio-temporal features together with their temporal dependencies. This fact is key for time series prediction problems such as forecasting, classification or anomaly detection, amongst others. In this pap...

En la primera parte de este trabajo, se exponen los resultados de una encuesta realizada entre empresas y autónomos andaluces sobre el conocimiento y el uso de esta tecnología en el ámbito empresarial. Este estudio ha revelado algunos resultados que deben ser considerados por los diferentes agentes e instituciones de cara a impulsar la adopción de...

The combination of convolutional and recurrent neural networks is a promising framework that allows the extraction of high-quality spatio-temporal features together with its temporal dependencies, which is key for time series prediction problems such as forecasting, classification or anomaly detection, amongst others. In this paper, the TSFEDL libr...

The17 Sustainable Development Goals (SDGs) established by the United Nations Agenda 2030 constitute a global blueprint agenda and instrument for peace and prosperity worldwide. Artificial intelligence and other digital technologies that have emerged in the last years, are being currently applied in virtually every area of society, economy and the e...

The United Nations Agenda 2030 established 17 Sustainable Development Goals (SDGs) as a guideline to guarantee a sustainable worldwide development. Recent advances in artificial intelligence and other digital technologies have already changed several areas of modern society, and they could be very useful to reach these sustainable goals. In this pa...

In this paper, we address the problem of collision detection between very high resolution polygonal models. We propose an approach that uses the EBP-Octree data structure in a single-core CPU architecture. The algorithm manages a set of files to support a cache-like out-of-core algorithm that performs the collision and intersection tests. Our metho...

This work was carried out over the past eight years through the Atalaya3D project, which aims to make the cultural heritage of the ten public Andalusian universities accessible. Since 2010, the project has been a pioneer in the field of 3D scanning of sculptures and historical sites, opening up restricted areas virtually through 3D web displays. Mo...

Cultural heritage (CH) documentation tasks usually involve professionals from different knowledge areas, which implies not only a huge amount of information and requirements, but also a very heterogeneous set of sources, data structures, content and formats. Geographic information systems (GIS) have been used extensively by cultural heritage specia...

In this paper we address the problem of fast inclusion tests and distance calculation in very large models, an important issue in the context of environments involving haptic interaction or collision detection. Unfortunately, existing haptic rendering or collision detection toolkits cannot handle polygonal models obtained from 3D digitized point cl...

Under the auspices of the Atalaya Project we have digitalized a set of artworks and historical rooms that belong to the Cultural Heritage of andalusian universities. In a first phase we have scanned with submillimetric accuracy 24 sculptures from Universities of Seville and Granada, as well as seven historical rooms of the latter, obtaining models...

En este trabajo se aborda el problema de la detección de inclusión y el cálculo de distancia a la superficie en modelos poligonales de varios cientos de miles de polígonos. Este problema es especialmente importante en el contexto de la interacción con dispositivos hápticos, presente en aplicaciones de realidad vütual tales como sistemas de entrenam...

Many researchers have dealt during last decade about digitizing and reconstructing hand made pottery elements from fragments retrieved in the archaeological excavations. Some studies have demonstrated the huge variability in results from manual processes, which usually leads into a wrong typological classification of the profile. Moreover, after or...

3D digitalization has become a common tool in archaeology. However, the post processing of the data produced by the scanners is still quite complex, and the computer models generated are given very few practical applications. In this paper, we analyse the key steps involved in the processing of the point clouds. We also review some of the more usu...

One of the most important problems nowadays in virtual archaeology is the fact that scanning real models produces huge amount of polygons, and these polygons must be rendered and displayed in a interactively way, trying to minimize the hardware requirements. In a global world, internet has become the most important way of knowledge, and archaeology...

Large-range laser scanners provide a huge number of points that are not so easy to handle with laptops and current commercial software. Each laser capture can have several million points, and usually it is needed more than one to retrieve the complete surface. These digitalization devices are used for scanning large areas like buildings, walls or g...

Tesis Univ. Granada. Departamento de Lenguajes y Sistemas Informáticos. Leída el 24 de noviembre del 2008

In this paper we present a new data structure: the BP-Octree (Bounding-planes Octree). The BP-Octree is based on a spatial decomposition of the model using an octree, and offers a very tight hierarchy of convex bounding volumes which leads to simplified models. It is done by assigning to each node of the tree a set of planes that, intersected one a...

En el presente trabajo se presenta una nueva estructura de datos que permite representar un solido mediante una jerarquía de planos espacialmente indexados. Se hace uso de un árbol para realizar la jerarquizacion tridimensionalmente indexada. Los planos que correponden a los nodos de dicho nivel forman una envolvente convexa del sólido en el volume...

Space-Partition Octree (SP-Octree) is a hierarchical representation scheme for solid modelling. It allows a multiresolution representation of polyhedral objects, and has been successfully used in progressive transmission. Moreover, this scheme allows visualising the model in an adaptive way. However, at intermediate levels of the SP-Octree, the obt...

One of the most important problems nowadays in virtual archaeology is the fact that scanning real models produces huge amount of polygons, and these polygons must be rendered and displayed in a interactively way, trying to minimize the hardware requirements. In a global world, internet has become the most important way of knowledge, and archaeology...

We present an easy, automatic an efficient full vessel reconstruction and drawing system, that works using a mesh model of the fragment taken from a 3D scanner. To get the appropriate orientation, the archaeologist select some areas of the border. Then, a genetic algorithm is applied to the point on these areas obtaining the plane that best fits to...

Resumen Lo arboles SP-Octrees permiten una representación multiresolución de ob-jetos poliédricos, que se ha usado para realizar transmisión progresiva. No obs-tante, la visualización de los objetos en niveles de resolución intermedios pre-senta cierta inexactitud al aproximar los nodos internos grises por nodos llenos, generando imágenes que en si...

Abstract Reconstructing vessels from sherds is a complex task, specially for hand made pottery. That is the case of the Iberian vessels. The reconstruction process can be done in three steps: orientation of the sherd, computing the symmetry,axis and detecting the profile. This paper presents methods,to accomplish,these three tasks in a semi-automat...

Abstract Every archaeological excavation must deal with a vast number of ceramic fragments. The documentation, admin- istration and scientific processing of these fragments represent a temporal, personnel, and financial problem. Up to now documentation,and classification have been done manually which means a lot of routine work for archaeol- ogists...