Javier Finat

Universidad de Valladolid | UVA · Department of Algebra, Geometry and Topology

Correspondences between k-tuples of points are key in multiple view geometry and motion analysis. Regular transformations are posed by homographies between two projective planes that serves as structural models for images. Such transformations can not include degenerate situations. Fundamental or essential matrices expand homographies with structur...

The current document is an introduction to a \emph{stratified approach} for several relevant problems in Robotics concerning to modeling, planning, tracking and control issues. From a more technical viewpoint, main contributions of the approach performed along these notes are focused towards (1) an unified treatment in terms of Lie actions (from al...

Las estratificaciones proporcionan un lenguaje apropiado para abordar cuestiones avanzadas en Ingeniería. En este trabajo se presentan algunas aplicaciones a la Mecánica de Fluidos, Robótica y aspectos de TIC relacionados con la asistencia a la producción de contenidos digitales

Las estratificaciones proporciona un lenguaje potente para abordar cuestiones avanzadas en Ingeniería. En este introducción se presentan algunas aplicaicones a la Mecánica de Fluidos, Robótica y aspectos de TIC relacionados con la asistencia a la producción de contenidos digitales.

Las estratificaciones proporcionan un lenguaje apropiado para abordar cuestiones avanzadas en Ingeniería. En este trabajo se presentan algunas aplicaciones a la Mecánica de Fluidos, Robótica y aspectos de TIC relacionados con la asistencia a la producción de contenidos digitales

BIM (Building Information Modelling) methodology allows sharing the information about the same construction between the involved stakeholders. The same building will be affected by different AEC (Architectural, Engineering and Construction) processes. Some n-dimensional extensions have been recently proposed in the literature. The fourth dimension...

The development of mobile applications is a challenging activity. The main problems are the limits of the mobile devices (in memory size, processing power, battery duration, etc.) and the diversity of target platforms, display sizes, or input modes (keypads or tactile screens). For these reasons, the software product line (SPL) development paradigm...

In this work, we give a description of a general methodology for the integration of Documentation, Information and Management Systems in the framework of Semantic Web. To achieve this goal, we provde a structural framework involving the knowledge management. Next, we adapt GIS layered methodologies to CH environments, including some aspects for sem...

Manufacture and preindustrial activities have configured infrastructures and commercial development along several centuries. Both regional economic and social environment of the present days can be seen as a consequence of the secular interaction between available physical resources and social tissue along our history. Since ancient times, the econ...

Mobile devices provide an increasingly sophisticated support to enhanced experiences and understanding the remote past in an interactive way. The use of augmented reality technologies allows to develop mobile applications for indoor exploration of virtually reconstructed archaeological places. In our work we have built a virtual reconstruction of a...

Learning of Conservation and Rehabilitation Tasks in AEC [Architecture, Engineering, Construction] environments poses hard challenges for integrating materials, context and processes. Our approach is focused towards different multimedia representations [text, image, video, laser scan] with a common reference given by an evolving representation of a...

In this work we develop a multiply interconnected system which involves objects, agents and interactions between them from the use of ICT applied to open repositories, users communities and web services. Our approach is applied to Architectural Cultural Heritage Environments (ACHE). It includes components relative to digital accessibility (to augme...

In this work we present a new software platform for interactive volumetric visualization of complex architectural objects and their applications to teaching and training conservation interventions in Architectural Cultural Heritage. Photogrammetric surveying is performed by processing the information arising from image- and range-based devices. Our...

Standardization is one of the pillars of interoperability. In this context, efforts promoted by the Open Geospatial Consortium, such as CityGML (Technical University, Berlin), a standard for exchanging three-dimensional models or urban city objects, are welcomed. However, information from other domains of interest (e.g. energy efficiency or buildin...

The increasing proportion of aged people in developed countries makes attractive the creation of assistance services for dependent people, based on remote monitoring. The use of information and communication technologies to facilitate their autonomy is a clear example of how technological advances can improve the quality of life of these persons. W...

Nowadays, there is a huge proliferation of software based on traditional image-based 3D reconstruction methods which use multiple images to extract 3D models. However, sometimes it is not possible to obtain such images, mainly when damaged or destroyed buildings need to be documented and only single photographs or paintings exist or even when worki...

From a single view that contains a three dimensional scene is possible to obtain substantial information about the object and even its partial reconstruction. This analysis can provide, in the case of Photogrammetry, measures of the original object, and in the case of Computer Vision, useful information to 3D reconstruction. Nevertheless, to carry...

There exists a very large amount of damaged buildings in Cultural Heritage. Common damages are related with structural deformations (lack of verticality, crashes, e.g.) and the degradation of the support (deteriorated materials, e.g.). A dense information is needed for both of them. Non-intrusive methods based in laser scans provide a 3d support wi...

Multirresolutions approaches require hybrid solutions for processing, analysis and visualisation of architectural and urban environments. Hybrid solutions must combine the accuracy of photogrammetric recording, density of point clouds captured with laser scans and increasing facilities provided by rendering of complex environments relative to reali...

Digital acquisition, processing and visualization of archaeological sites require increasing performance for software tools. The application of hybrid methodologies based on digital information poses new challenges for satisfying professional and entertainment requirements, helping to have a better understanding of archaeological sites. A faithful...

We have developed a software tool for Learning of Conservation and Rehabilitation Tasks in AEC [Architecture, Engineering, Construction] environments. It is based on different multimedia contents [text, image, video, laser scan] which are georeferenced to a representation of an outdoor scene. Three-dimensional modelling is compatible with any kind...

Cultural Heritage documentation by itself is meaningless if it does not help to create wealth and provide values to society. In recent years, the number of digital contents related to cultural heritage resources is growing in a way that it very difficult to discover reliable information. Thanks to the Internet they can be easily published and distr...

The fusion of different image-and range-based techniques is acknowledged as the best option for three-dimensional surveying of objects displaying a complicated geometry at different scales and/or resolutions. A special case deserving still several challenges involves to towers which represent a compendium of constructive elements and, consequently,...

Buildings in Cultural Heritage environments exhibit some common structural defects in elements which can be recognized by their differences with respect to the ideal geometric model. The global approach consists of detecting misalignments between elements corresponding to sections perpendicular to an axis, e.g. The local approach consists of detect...

Space-temporal models for Geographic Information Systems (GIS) have been of increasing use from the early nineties in regard to pro-cesses requiring a frequent updating of spatial information. There is a common agreement about the need of using a vector support for representing the evolution of spatial data along the time, and a lot of extensions o...

Location of industries or services is a classical problem with an overlapping of techniques involving a ge- ographic support, a quantitative evaluation of supply and demand components, and communication networks. Tradi- tional Cost-Benefit Analysis are focused towards maximization of economic and social benefits in terms of distance maps, minimizat...

This article explains the working methodology followed to carry out a project in which the D laser scanner survey of San Martin’s Church (placed in Plaza Juan Bravo, in the historic city centre of Segovia Spain), has been undertaken. There is also a virtual tour through the nearby streets, which lead us to the Jewry Museum, going through the Paseo...

Life quality of dependent persons is associated with personal autonomy and mobility, between others parameters. But the development of mobile applications for autonomy support is a challenging activity. Some of the challenges are the diversity of target platforms (including display sizes, keypads or tactile screens variations in each platform), and...

A semiautomatic management of traffic scenes displays a large diversity of mobile data arising from usual Computer Vision techniques. The mobile nature of inputs requires the combination of different techniques for filtering, tracking, and clustering features along a video sequence. These problems are considerably harder in presence of low visibili...

The increasing proportion of aged people in developed countries makes attractive the creation of assistance services for dependent people, based on remote monitoring. The use of information and communication technologies to facilitate their autonomy is a clear example of how technological advances can improve the quality of life of these persons. W...

Usual approaches to GIS (Geographic Information Systems) to AEC (Architecture, Engineering and Construction) environments follow a strategy where raster information is referred to vector data. The large diversity of business models, processes, services and applications makes very difficult to share or exchange information and there is an increasing...

Technology Enhanced Learning (TEL) is an area of increasing interest at working places. Its interest arises from a combination of different factors such as the capability of improving skills and formation of workers, better performance at each workplace, higher flexibility and adaptability contents; distribution, updating and addition of materials...

La resolución de los problemas de Accesibilidad al Patrimonio según los principios de “Diseño para Todos” requiere una integración de herramientas (orientadas a técnicos y Administración) y de funcionalidades (orientadas hacia diferentes tipos de usuarios, con especial atención a personas dependientes ó discapacitadas). Las cuestiones más important...

This research work, aims to contribute to the increasing application of new technologies (3D laser-scanner) in the archaeological discipline, with the aim of developing new avenues of study related documentation, analysis, dissemination, conservation and value of the archaeological register. To tackle this project successfully, we considered essent...

The problem of fall detection in elderly patients is particularly critical in persons who live alone or are alone most of the day. The use of information and communication technologies to facilitate their autonomy is a clear example of how technological advances can improve the quality of life of dependent people. This article presents a prototype...

The problem of fall detection in elderly patients is particularly critical in persons who live alone or are alone most of the day. The use of information and communication technologies to facilitate their autonomy is a clear example of how technological advances can improve the quality of life of dependent people. This article presents a prototype...

A sustainable urban environment requires an integration of documentation and management systems in surveying and planning applications for different kinds of services involving services and processes. Traditional GIS approaches are geo-referenced to 2D information or, more recently, to a virtualized environment arising from the reprojection of text...

The increasing proportion of aged people in the population of developed countries requires the provision of assistance services based on remote continuous monitoring. Wireless sensors allow regular and real-time information to be obtained concerning health parameters in a non-intrusive way. The identification of critical values for these parameters...

El objetivo general de la Eficiencia Energética es la reducción del consumo de energía y del impacto de los edificios sobre el entorno a lo largo de su ciclo de vida. Ello requiere nuevas herramientas de diseño y seguimiento de los procesos, que incluyen el análisis de los casos existentes y la simulación de nuevas soluciones para facilitar un sopo...

El objetivo de este trabajo es mostrar algunos desarrollos recientes relacionados con la integración de métodos y herramientas de Sistemas de Información, Procesamiento y Visualización de Datos Geoespaciales en un marco 3D. Con ello se pretende facilitar un marco común que afecta a las fases de toma de datos, procesamiento y análisis de la informac...

Energy efficiency in buildings involves to the interoperability between tools for integrated networks of sensors for data (capture, monitoring and control), 3D Information Systems in AEC for their representation, and services architectures for their management. The interoperability between all of them requires a semantic frame-work able of identify...

The evolution of the population pyramid in developed countries, with an increasing proportion of aged people introduces new challenges to the public and private assistance services. A form of improving these services while keeping controlled the associated costs is to use remote continuous assistance. Wireless sensors allow obtaining real-time info...

The increasing availability of software tools for image-and range-based surveying and visualizing 3D objects has posed some issues relative to the need of integrating different contents (relative to data and metadata, structure and function) in a common Information System. In this work, we develop an integrated solution for a 3D GIS whose support i...

During the last years some computer-assisted semen analysis (CASA) software have appeared to assist the laboratory andrologist labour, but the detailed method of these systems have been hidden to the scientific community because of commercial interests. In this work a simple and efficient CASA system is presented from the computer vision researcher...

In the past few years, there exists an increasing relevance for surveying, protection, restoration and dissemination of Cultural Heritage. This trend is supported by the power provided by Information and Communication Technologies in two remarkable aspects: the ability of computer based tools for representing 3D objects from digital images and the...

The recent incorporation of laser devices provides advanced tools for assisting the conservation and restoration of Cultural Heritage. It is necessary to have as complete as possible understanding of the object state before evaluating or defining the reach of the restoration process. Thus, a special effort is devoted to surveying, measuring and gen...

El monasterio de Santa María de Aciago, situado en el término municipal de Villanueva de Duero (Valladolid), muy próximo a la desembocadura del Adaja en el Duero, perteneció a la Orden Cartuja, institución fundada en 1084 en el monasterio de la Chartreuse, cerca de Grenoble, por San Bruno y seis compañeros monjes. Llamado por el Papa Urbano II a Ro...

The recent incorporation of laser devices provides advanced tools for assisting the conservation and restoration of Cultural Heritage. It is necessary to have as complete as possible understanding of the object state before evaluating or defining the reach of the restoration process. Thus, a special effort is devoted to surveying, measuring and gen...

Los recientes avances en la captura y procesamiento de información 3d permiten abordar la elaboración y gestión de documentación a diferentes niveles de resolución para aplicarlo en tareas de documentación y visualización. El sistema desarrollado por el grupo DAVAP de la Universidad de Valladolid, combina metodologías basadas en fotogrametría terre...

In this paper an integrated approach for modeling complex archaeological sites is developed. Particularly, we describe a 3D modeling pipeline which integrates laser scanning and low-cost Photogrammetry over an emblematic Jewish tanneries situated in Avila (Spain). Due to its inherent complexity and the relevance of the archaeological site, Jewish t...

Visual perception of the environment provides a detailed scene representation which contributes to improve motion planning and obstacle avoidance navigation for wheelchairs in non-structured indoor scenes. In this work we develop a mobile representation of the scene based on perspective maps for the automatic naviga-tion in absence of previous info...

This contribution gives account of one of the results achieved by the group MAPA (Models and Algorithms for the digital documentation of Architectural Heritage) that integrates the IMAP3D group and the DAVAP group. The group work is based on the assumption that preservation of cultural heritage is a responsibility for the whole cartographic communi...

The global management of complex urban environments require flexible Information Systems able of adapting to different needs of private and institutional agents related to preservation and sustainability of Cultural Heritage. Heterogeneity of formats and sources makes difficult the transfer of digital information, which is increased by nontextual s...

El monasterio de Santa María de Aciago, situado en el término municipal de Villanueva de Duero (Valladolid), muy próximo a la desembocadura del Adaja en el Duero, perteneció a la Orden Cartuja, institución fundada en 1084 en el monasterio de la Chartreuse, cerca de Grenoble, por San Bruno y seis compañeros monjes. Llamado por el Papa Urbano II a Ro...

Laser-based surveying of 3D curved objects is based on discrete clouds of points. Ordering such clouds of points simplifies the computer data management, but can increase troubles when misleading surfaces are superimposed to 3D objects. An evaluation of adaptive goodness-of-fit is need to bound errors and to maintain the model fidelity to the objec...

Multi-resolution surveying is a topic with increasing interest for information management and visualization of Cultural Heritage. Highly ornamented façades provide a challenge for testing integration of techniques to different resolutions. In this work we develop two strategies based on high resolution digital photogrammetry and 3D laser scanning f...

A real-time and reliable automatic video segmentation is one of the outstanding problems in Computer Vision with large applications to compression, transmission and motion analysis. In this paper, we show a novel approach based on the superposition of distance maps linked to centroids of mobile regions acting as attractors of homogenous regions to...

Reconstruction from a single view of architectural scenes is possible thanks to the automatic identification of structural perspective elements in the view. Reliable and accurate reconstruction depends strongly on a robust estimation of vanishing points. In this paper we compare different approaches for estimation of vanishing points, and we justif...

PDE have been used in image processing for denoising and stabilizing edges. Main approaches concern to diffusion processes (heat equation) and variational principles (energy method). In this work we propose a first approach to the image processing by means of a simple integro-differential equation given by the linear equation. Our purpose is to exp...

In this paper we address the problem of the estimation and automatic generation of structural perspective elements in architectural scenes. Structural character of geometric approach concerns to the preservation of incidence and adjacency constraints which can be visualized in different views of the same scene. The automatic generation of a perspec...