Santiago Salamanca

Santiago Salamanca
Universidad de Extremadura | UNEX · Department of Electric Engineering, Electronics and Automatics

Ph.D.

About

81
Publications
17,643
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
335
Citations
Citations since 2017
24 Research Items
162 Citations
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
Additional affiliations
November 1995 - March 2020
Universidad de Extremadura
Position
  • Professor (Assistant)

Publications

Publications (81)
Article
Full-text available
Accessibility regulations towards building design and public places are more restrictive than in past years. Along with energy efficiency, accessibility is one of the pillars of an optimal building design. However, even buildings adapted for actual regulations are not always optimal, and there is still much to do to avoid adding more difficulties f...
Chapter
Full-text available
Las nubes de puntos cada vez pueden contener más información, parte de la cual puede ser variable en el tiempo. Por este motivo, es valioso poder generar nubes que contengan la información correspondiente a diferentes instantes de tiempo sin la edundancia de información espacial. De esta forma, se consigue que el procesamiento y la visualización de...
Chapter
Full-text available
Desde sus inicios, el ámbito de la visión por computador se ha esforzado por recabar de imágenes 2D y espacios 3D la información y el conocimiento que el ser humano puede extraer fácilmente con un solo vistazo. Los métodos más efectivos han apostado por llevar el concepto de inteligencia artificial un paso más allá, optando por unir la extracción d...
Article
Full-text available
This paper presents a method to restore 3D models created from range sensors. The approach recovers the 3D information that is lost during the scanning process, usually due to inaccessible zones on the object (occluded areas and crevices). The raw and incomplete 3D data are first projected onto a grid to identify the zones to be repaired. Our algor...
Chapter
Full-text available
No se concibe el trabajo arqueológico en la actualidad sin la inclusión de nuevas metodologías que faciliten las tareas de investigación y ofrezcan soluciones a problemas que, empleando métodos tradicionales, quedarían sin resolver. Proponemos en este artículo la aplicación de una estrategia de reconstrucción de puzles 3D incompletos sobre una de l...
Article
Full-text available
People with disabilities encounter numerous barriers when dealing with the simplest and most usual things in their daily lives. This is even more remarkable when they are faced with archaeological heritage buildings or environments. People with reduced mobility come too often upon architectural barriers that stop them from enjoying their visits to...
Article
The traditional approach for physical reproduction in Cultural Heritage requires the production of moulds on the very surface of the original artwork in an invasive, manual and usually time-consuming process that is intensely influenced by the complexity of the piece to be reproduced. The difficulties increase when changing the size of the copy is...
Article
Full-text available
Technology development really reaches its highest point when it becomes a tool to facilitate life to people, especially to those more disadvantaged groups. This is the case of people with disabilities, who find lots of barriers to cope with the most usual and simplest things in their day-to-day. This fact is even more significant when they happen t...
Conference Paper
t is a fact that studying subjects eminently theoretical as History, Philosophy, etc. may sometimes be boring for teenagers. In our current society, based on the immediacy of data, images, sounds..., telling stories in a traditional way ends up reversing in a counterproductive way for learners and teachers. New educational methodologies have been d...
Article
This paper presents an original method for the analysis of the geometric and optical properties of parabolic solar trough collectors using laser scanners and image processing techniques. The aim of the paper is to propose a methodology with which to automatically analyse geometric errors in the mirror and receiver, in addition to presenting an empi...
Conference Paper
Children, from ever younger ages, are exposed to new technologies and accustomed to their usage. One of the uses they enjoy the nost are video games. During game sessions, they are focused on the objectives of the game and have an enthusiastic and active attitude. Conversely, children have a passive attitude, as mere receivers of knowledge, and som...
Chapter
The current advances of Information and Communication Technologies (ICTs) have created new spaces for the recreational participation, mainly on virtual spaces, which can be considered as one of the main drivers of the cultural and creative production. This paper describes the experience in developing and testing an interactive 3D virtual environmen...
Conference Paper
Full-text available
El Modelado con Información para la Construcción (Building Information Modelling o BIM, en inglés) es una metodología de trabajo colaborativa que implica el proceso de generación y gestión de datos de un edificio a lo largo de su ciclo de vida. En los últimos años, estos modelos se han adaptado con éxito a la gestión de información en el ámbito de...
Conference Paper
Full-text available
En este trabajo se presenta un procedimiento de segmentación de datos 3D pertenecientes a obras del patrimonio cultural. El objetivo es, en primer lugar, que el algoritmo sea capaz de separar las zonas ornamentales de las no ornamentales y, en segundo lugar, que el procedimiento sea rápido. Para ello se ha propuesto un método que realiza la segment...
Conference Paper
Full-text available
Este trabajo trata de la adaptación experimentada por la metodología BIM (Building Information Modelling) para abordar el modelado y la gestión de edificios históricos, obteniendo lo que se conoce como HBIM (Heritage/Historic Building Information Model). Las siete dimensiones y los niveles de madurez establecidos en BIM, se evalúan y analizan para...
Chapter
This chapter presents a new line of research that addresses the treatment of data acquired through different sensors to capture reality in order to obtain useful information that can be applied to the generation of knowledge in the field of conservation and restoration of Cultural Heritage. This technology is expected to be used to solve impact pro...
Chapter
This chapter deals with the adaptation experienced by BIM (Building Information Modelling) methodology to address the modelling and management of heritage/historic buildings, obtaining what is known as HBIM (Heritage/Historic Building Information Modelling).
Article
Full-text available
This paper presents a review of the most relevant current techniques that deal with hole-filling in 3D models. Contrary to earlier reports, which approach mesh repairing in a sparse and global manner, the objective of this review is twofold. First, a specific and comprehensive review of hole-filling techniques (as a relevant part in the field of me...
Article
Full-text available
En este artículo se propone un método para rellenar huecos en objetos 3D. La idea principal es la de utilizar un algoritmo de restauración de imágenes para reconstruir las partes que se han de completar. Para ello es necesario hacer una transformación de los datos de la superficie 3D en datos de imagen 2D. Por tanto, el algoritmo propuesto parte de...
Conference Paper
In this paper we show the work that must be carried out to generate accurate, dense and coloured 3D models of large outdoor ancient scenarios from scanners. This is a challenging research field in which several problems still remain unsolved. Particularly, the 3D model creation process in outdoor scenes might be inefficient if the scene is digitali...
Article
Full-text available
This paper deals with the generation of accurate, dense and coloured 3D models of outdoor scenarios from scanners. This is a challenging research field in which several problems still remain unsolved. In particular, the process of 3D model creation in outdoor scenes may be inefficient if the scene is digitalized under unsuitable technical (specific...
Conference Paper
This paper has a double aim: on the one hand it deals with the description of the work that must be carried out to incorporate 3D models to the teaching-learning process. It covers the whole course of action from the planning acquisition phase to the post-processing stage that finishes with the digital replica of the real object provided. On the ot...
Article
The automatic reconstruction of archeological pieces through the integration of a set of unknown segments is a highly complex problem which is still being researched. When only a few segments of the original piece are available, solutions exclusively based on computational algorithms are inefficient when attempting to create a credible whole restor...
Conference Paper
Full-text available
To date the methods to create accuracy dense realistic 3D models of outdoors by using laser scanners are highly dependent on the on-site conditions in the very moment of the 3D data collection. Thus, researchers put in a lot of effort on eliminating colour incoherencies (sunny/shady, bright/dark, non sensed areas, etc.) or modelling the light of th...
Article
Full-text available
Imagine for a moment that you have to solve a 3D jigsaw of which you have lost several pieces. You have also lost the original box-top showing the final picture, and as if that were not enough, some of the pieces you do have may belong to some other jigsaw. This is in essence the sort of challenge that we faced in the novel project that we shall be...
Article
The intention of the strategy proposed in this paper is to solve the object retrieval problem in highly complex scenes using 3D information. In the worst case scenario the complexity of the scene includes several objects with irregular or free-form shapes, viewed from any direction, which are self-occluded or partially occluded by other objects wit...
Article
Full-text available
Lo más habitual es que los restos arqueológicos estatuarios se encuentran fragmentados. Debido a ello, en cada fragmento habrá zonas que formen parte de la porción esculpida y otras que sean regiones por donde se haya roto la escultura. Una labor inicial básica para la restitución de éstas, es la determinación de qué partes son de rotura y qué part...
Conference Paper
In this paper we propose a method for characterizing the surface of fractured pieces which come from old and complete original objects. Natural fractured pieces are difficult to segment due to the fact that the faces and edges are not well defined. For this reason, standard local feature based approaches are clearly inefficient to make an efficient...
Article
Full-text available
This work analyzes a new method for object recognition in complex scenes combining vision-based techniques applied to the 3-D data obtained using range sensors and object identification coming from radio frequency tags (radio frequency identification (RFID) technology). Three-dimensional vision-based algorithms for object recognition have many rest...
Article
In this paper, we present a structured light technique based on the projection of a color coded hexagonal array that is able to obtain range images from moving scenes. Repetition and disorder is allowed in the codeword which implies several advantages: the mean Hamming distance between contiguous codewords of the pattern increases, the code loss du...
Conference Paper
Full-text available
Object recognition may be a hard computer vision task under severe occlusion circumstances. This problem is efficiently solved in this paper through a new 3D recognition method for free-form objects. The technique uses the Depth Gradient Image Based on Silhouette representation (DGI-BS) and settles the problem of identification-pose under occlusion...
Conference Paper
In this paper we present the 3D restitution of large and incomplete thousand-year-old sculptures belonging to the Spanish Museum of Roman Art (MNAR, Museo Nacional de Arte Romano). Roman sculptures are difficult to synthesize because of the complex geometry of the clothes that the characters usually wear and the glows that the marble causes. Theref...
Conference Paper
Full-text available
This work faces the problem of 3D shape clustering when the whole surface information is available. The key of our method is to use a flexible feature, called Cone-Curvature, which provides local and extended information around every node of the mesh that represents the object. Thus as we increase the region around a node a new order of CC can be c...
Conference Paper
Full-text available
In this work a method for filling holes in 3D meshes based on a 2D image restoration algorithm is expounded. Since 3D data must be converted to a suitable input format, a 3D to 2D transformation is executed by projecting the 3D surface onto a grid. The storage of the depth information in every grid provides the 2D image which the restoration algori...
Conference Paper
One of the lacks of the current conventional 3D sensor devices is that they are unable to carry out an efficient fusion between overlapped samples and generate complete and realistic reconstruction of an object (Figure 1). The completeness concerns both geometry and colour aspects (G+C). Consequently, obtaining whole (G+C) and precise registration...
Article
Full-text available
This paper presents a new strategy to extract knowledge about the objects and their relative location in a complex scene when a single range image is taken. The analysis process is based on a range data distributed segmentation technique, which separates the components of the scene, and on a silhouette segmentation method, which classified the silh...
Conference Paper
Nowadays virtual reality users and professionals demand a growing quality and a higher degree of realism in development and applications. Among these technologies augmented reality systems stand out due to their complexity and possibilities, having open current problems from the digitalization process to the accurate insertion of digital informatio...
Article
Full-text available
This work describes a method for filling holes in a 3D mesh based on 2D image restoration algorithms. Since these algorithms need an image as input, the first stage of the method concerns a 3D to 2D transformation. By pro- jecting the 3D surface onto a squared plane, a 2D image is generated in such a way that the depth information is stored in each...
Conference Paper
This work presents a new method for object recognition in complex scenes combining vision-based techniques applied to the 3D data obtained using range sensors, and object identification coming from Radio Frequency tags (RFID technology). Vision based algorithms for 3D recognition have many restrictions in practical applications: uncertainty, incapa...
Article
Full-text available
En este trabajo se muestra un método para el reconocimiento de objetos de forma libre a partir de los datos de rango de una vista parcial. Para ello presentamos una nueva característica que denominamos Cono-Curvatura Ponderada (WCC), que mide el ángulo que sustenta cada uno de los nodos de la malla. Debido a que la información empleada no es comple...
Article
In this work we present a method for free-form object recognition from range data of one partial view. To do this, a new feature, called Weighted Cone-Curvature (CCW), is introduced. The CCW measures the angle supported for the nodes of the mesh. Because of the fact that the information is not complete, it is necessary to apply a technique based on...
Conference Paper
Object recognition in 3D scenes with occlusion means identifying an incomplete and unknown object, which is arbitrarily posed, in an object database. This hard computer vision problem is solved in this paper through a new 3D shape representation called depth gradient image based on silhouette (DGI-BS). DGI-BS can be used to obtain a complete model...
Conference Paper
Full-text available
Greatest difficulties arise in 3D environments when we have to deal with a scene with dissimilar objects without pose restrictions and where contacts and occlusions are allowed. This work tackles the problem of correspondence and alignment of surfaces in such a kind of scenes. The method presented in this chapter is based on a new representation mo...
Chapter
Full-text available
This paper presents a method to estimate the pose (position and orientation) associated to the range data of an object partial view with respect to the complete object reference system. A database storing the principal components of the different partial views of an object, which are generated virtually, is created in advance in order to make a com...
Article
Full-text available
En este trabajo se presenta un toolbox para el programa Matlab que permite la adquisición de datos 3D mediante técnicas de visión activa. Se trata de un sistema constituido por elementos de bajo coste: una cámara (en nuestro caso se ha empleado una webcam conectada al puerto USB del PC), una lámpara, dos planos de referencia y una barra o stick. Ot...
Conference Paper
This work presents a method for free-shaped object recognition from its partial views. Consecutive database reductions are achieved in three stages by using effective discriminant features. These features are extracted from the spherical mesh representation used to modeling the partial view and from the view range data itself. The used characterist...
Conference Paper
Full-text available
This paper shows how to extract information about the parts and their layout in a complex scene when a single range image is available. In the worst case, the complexity of the scene includes: no shape-restrictions, shades, occlusion, cluttering, contact, surfaces viewed in oblique angles and without textures. This work is a prerequisite before car...
Article
This paper presents the structure and the generation method of a database composed of virtually generated partial views of 3D real objects. The main purpose of this database is to help in the visualization of complex scenes composed of several objects where only partial range data information of each object is available. The database stores the pri...
Conference Paper
Full-text available
A 3D shape characterization that allows establishing robust similarity measurements is presented. This characterization is based on a new extended curvature feature called cone-curvature (CC), built on top of the recent modeling wave (MW) topological organization for 3D objects modeling meshes. Through the CC feature, flexible and extended surround...
Conference Paper
Full-text available
In this paper we present a method for automatic segmentation of 3D complex scenes from a single range image. A complex scene includes several objects with: irregular shapes, occlusion, the same colour or intensity level and placed in any pose. Unlike most existing methods which proceed with a set of images obtained from different viewpoints, in thi...