Resultados de la búsqueda39 resultados

  • GRAPP'13: On the Characterization of a Speed-boat Motion for Real-time Motion Cueing

    Casas, Sergio; Coma, Inmaculada; Riera, Jose V.;Fernández, Marcos

    2013. Article

    Full article.

    Watercraft. This paper presents an experimental characterization of a speed-boat in order to understand the nature and magnitude of a typical small watercraft motion. Unlike other studies, this work focuses on realtime simulation instead of on boat design issues. The purpose of the study is to guide the future process of designing and parameterizing a suitable motion platform for a VR application. The characterization is performed by placing two accelerometers, two gyroscopes, one GPS logger, one digital compass, and one digital anemometer on a speed-boat at several ranges of motion and maneuvering. We analyze tilt, speed, wind, steering, angular speed, acceleration and angular acceleration...

    Watercraft. This paper presents an experimental characterization of a speed-boat in order to understand the nature and magnitude of a typical small watercraft motion. Unlike other studies, this work focuses on realtime simulation instead of on boat design issues. The purpose of the study is to guide the future process of designing and parameterizing a suitable motion platform for a VR application. The characterization is performed by placing two accelerometers, two gyroscopes, one GPS logger, one digital compass, and one digital anemometer on a speed-boat at several ranges of motion and maneuvering. We analyze tilt, speed, wind, steering, angular speed, acceleration and angular acceleration at both frequency and time domains. Characterization results show that at least a 3-DoF heave-pitch-roll motion platform should be used

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  • GRAPP'13: Virtual Avatars Signing in Real Time for Deaf Students

    Vera, Lucia; Coma, Inmaculada; Campos, Julio; Martínez, Bibiana; Fernández, Marcos

    2013. Article

    Full article.

    This paper describes a speech and text translator from Spanish into Spanish Sign Language, that tries to solve some of the problems that deaf people find when they access and attend specific training courses. In addition to the translator system, a set of real-time avatar animations representing the signs are used. The creation process of such avatars is also described. The system can be used in courses where deaf and hearing people are sharing the same material and classroom, which contributes to improve the integration of this group of people to specific academic areas. The tool has been tested to obtain direct information with a group of deaf people from the Deaf Association of Seville.

  • GRAPP'12:An Occlusion-Aware AR Authoring Tool for Assembly and repair tasks

    Gimeno, Jesús; Morillo, Pedro; Orduña, Juan Manuel; Fernández, Marcos

    2012. Article

    Full article.

    The use of authoring tools has become a valuable trend for the fast development of Augmented Reality (AR) applications in industrial organizations. However, most of current AR authoring tools are actually programming interfaces that are exclusively suitable for programmers. Moreover, they do not provide advanced visual effects, such as occlusion or object collision detection, to the resulting AR applications. In this paper, we propose an easy-to-use AR authoring tool oriented to the development of AR applications for the execution of industrial sequential procedures. Unlike other recent easy-to-use AR authoring tools, this software framework allows non-programming users to develop low-cost...

    The use of authoring tools has become a valuable trend for the fast development of Augmented Reality (AR) applications in industrial organizations. However, most of current AR authoring tools are actually programming interfaces that are exclusively suitable for programmers. Moreover, they do not provide advanced visual effects, such as occlusion or object collision detection, to the resulting AR applications. In this paper, we propose an easy-to-use AR authoring tool oriented to the development of AR applications for the execution of industrial sequential procedures. Unlike other recent easy-to-use AR authoring tools, this software framework allows non-programming users to develop low-cost AR applications, including occlusion capabilities, by means of the use of a Kinect sensor. These applications could be used in on-site assembly and maintenance/ repair tasks where a certain level of depth perception is needed. In order to validate our AR authoring tool, we have developed four AR applications belonging to different industrial areas. The evaluation results show that overlaying 3D instructions on the actual work pieces reduces the error rate for an assembly task by more than a 75%, particularly diminishing cumulative errors common in sequential procedures. Also, the results show that the time required by non-programming users to develop the AR prototypes using our tool was more than 90% lower than the time required for developing the same prototypes with computer graphics programmers. These results show the potential of our approach and validate the tool as a general-purpose AR authoring tool for industrial AR applications

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  • GRAPP'12: On the Real-time Physics Simulation of a Speed-Boat Motion

    Casas, Sergio; Rueda, Silvia; Riera, José V.; Fernández, Marcos

    2012. Article

    Full article.

    Training necessities on watercraft have increased during the last few years and real-time simulators offer a suitable and safe alternative. However, the design of a real-time watercraft simulator implies that, water simulation and water-vehicle interaction have to be addressed efficiently. This paper presents a simplified physics model of the water-vehicle interaction for real-time speed-boat simulators that run over 6-DOF motion platforms. The proposed model is highly parametrizable and can be adapted to any speed-boat by changing the values of the parameters. We propose the evaluation of the designed model in a quantitative and a qualitative way. Evaluations results show that the proposed...

    Training necessities on watercraft have increased during the last few years and real-time simulators offer a suitable and safe alternative. However, the design of a real-time watercraft simulator implies that, water simulation and water-vehicle interaction have to be addressed efficiently. This paper presents a simplified physics model of the water-vehicle interaction for real-time speed-boat simulators that run over 6-DOF motion platforms. The proposed model is highly parametrizable and can be adapted to any speed-boat by changing the values of the parameters. We propose the evaluation of the designed model in a quantitative and a qualitative way. Evaluations results show that the proposed model behaves like a real one in terms of both objective trajectories and subjective perceived experience.

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  • GRAPP'12: A Kinect-Based Augmented Reality System for Individuals with Autism Spectrum Disorders

    Casas, Xavier; Herrera, Gerardo; Coma, Inmaculada; Fernández, Marcos

    2012. Article

    Full article.

    In this paper an Augmented Reality system for teaching key developmental abilities for individuals with ASD is described. The system has been designed as an augmented mirror where users can see themselves in a mirror world augmented with virtual objects. Regarding the content the tool is designed with the aim of facilitating the acquisition of certain skills in children with ASD. From a technical point of view, it has been necessary to solve two problems to develop the tool. The first one has been how to capture the user’s movements, without wearing invasive devices, to animate their virtual avatar. A Kinect device has been chosen. The other problem has been to mix in the augmented virtual...

    In this paper an Augmented Reality system for teaching key developmental abilities for individuals with ASD is described. The system has been designed as an augmented mirror where users can see themselves in a mirror world augmented with virtual objects. Regarding the content the tool is designed with the aim of facilitating the acquisition of certain skills in children with ASD. From a technical point of view, it has been necessary to solve two problems to develop the tool. The first one has been how to capture the user’s movements, without wearing invasive devices, to animate their virtual avatar. A Kinect device has been chosen. The other problem has been to mix in the augmented virtual scene real objects located at different depths. An OSG shader has been developed, of which details will given in this paper.

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  • NOVATICA: ObservAR, sistema de realidad aumentada multiusuario para exposiciones

    Gimeno, Jesús; Olanda, Ricardo; Martínez, Bibiana; Sanchez, Fernando M.

    2011. Article

    Full article.

    En la actualidad, los museos y salas de exposiciones buscan nuevas formas de mostrar al público sus colecciones de una manera más atractiva. Para ello, emplean nuevas tecnologías como la realidad aumentada, que permiten involucrar activamente al público de forma física, intelectual y social. En este artículo se presenta el diseño y la puesta en funcionamiento de un sistema de realidad aumentada que ofrece un nuevo tipo de experiencia educativa. El sistema está formado por pantallas de visualización que integran el contenido real de la sala de exposición, incluido el público, con elementos audiovisuales y objetos 3D virtuales con los cuales se interactúa a través de un sistema de marcas...

    En la actualidad, los museos y salas de exposiciones buscan nuevas formas de mostrar al público sus colecciones de una manera más atractiva. Para ello, emplean nuevas tecnologías como la realidad aumentada, que permiten involucrar activamente al público de forma física, intelectual y social. En este artículo se presenta el diseño y la puesta en funcionamiento de un sistema de realidad aumentada que ofrece un nuevo tipo de experiencia educativa. El sistema está formado por pantallas de visualización que integran el contenido real de la sala de exposición, incluido el público, con elementos audiovisuales y objetos 3D virtuales con los cuales se interactúa a través de un sistema de marcas natural e intuitivo. La aplicación de este sistema se ha llevado a cabo con éxito en la exposición “Valencia, tierra de comarcas: Diálogos con el patrimonio” donde se realiza un recorrido por el patrimonio cultural de la comunidad valenciana.

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  • An Augmented Reality (AR) CAD System at Construction Sites

    Gimeno, Jesús; Morillo, Pedro; Casas, Sergio; Fernández, Marcos

    2011. Article

    Published on the book: Augmented Reality, some emerging application areas, ISBN: 978-953-307-422-1. --- In this work, key aspects of AR in construction sites are faced and a construction AR aided inspecting system is proposed and tested. Real world would appear in the background with the construction plans superimposed, allowing users not only to inspect all the visible elements of a given building, but also to guarantee that these elements are built in the correct place and orientation. Besides merging computer-generated information from CAD (Computer Aided Design) plans and real images of the building process, the proposed system allows users to add annotation, comment or errors as the...

    Published on the book: Augmented Reality, some emerging application areas, ISBN: 978-953-307-422-1. --- In this work, key aspects of AR in construction sites are faced and a construction AR aided inspecting system is proposed and tested. Real world would appear in the background with the construction plans superimposed, allowing users not only to inspect all the visible elements of a given building, but also to guarantee that these elements are built in the correct place and orientation. Besides merging computer-generated information from CAD (Computer Aided Design) plans and real images of the building process, the proposed system allows users to add annotation, comment or errors as the building process is completed. Since this information is saved in DXF (Drawing Exchange Format) format, a new layer can be added to the original CAD plans including the accomplished modifications. Therefore, users can import original CAD plans to be visualized on real environments, to perform the required modifications using actual image from the current states of the construction site and, finally, to save the final results in the original CAD file. The aim of this new way of working is not to replace the usual CAD applications, but to add a new, more intuitive, faster and reliable stage, in the testing, assessment and modification of plans for construction and reconstruction projects.

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  • Interact'11: Multiuser augmented reality system for indoor exhibitions

    Gimeno, Jesús; Olanda, Ricardo; Martínez, Bibiana; Sanchez, Fernando M.

    2011. Article

    Full article.

    Over the last years, museums and galleries are looking for new ways to show exhibitions to visitors. For that purpose, new technologies like augmented reality are used. In this paper an augmented reality system for indoor exhibitions is presented. The system is formed by visualization screens that mix exhibition environment, visitors included, with multimedia and virtual 3D objects which visitors can manipulate naturally using a markers system. This system has been used in the exhibition “Valencia, tierra de comarcas: Diálogos con el patrimonio”, which deals with a trip through the valencian cultural heritage.

    Poster

  • Interact'11: Augmented Mirror: Interactive Augmented Reality System based on Kinect

    Vera, Lucia; Gimeno, Jesús; Coma, Inmaculada; Fernández, Marcos

    2011. Article

    Full article.

    In this paper we present a virtual character controlled by an actor in real time, who talks with an audience through an augmented mirror. The application, which integrates video images, the avatar and other virtual objects within an Augmented Reality system, has been implemented using a mixture of technologies: two kinect systems for motion capture, depth map and real images, a gyroscope to detect head movements, and control algorithms to manage avatar emotions

  • Interacción'11: Espejo Aumentado: sistema interactivo de Realidad Aumentada basado en Kinect

    Vera, Lucia; Gimeno, Jesús; Coma, Inmaculada; Fernández, Marcos

    2011. Article

    Articulo completo.

    Presentamos en este artículo un sistema de interacción basado en Realidad Aumentada que permite conversar a un personaje virtual controlado por un actor en tiempo real con el público asistente a través de una pantalla de gran formato a modo de espejo aumentado. El sistema integra imágenes de vídeo reales con las imágenes virtuales del avatar y otros objetos animados incorporados como apoyo a la conversación. Para su implementación hemos optado por la exploración y combinación de tecnologías: dos sistemas kinect para captura de movimientos corporales, mapa de profundidad e imágenes reales, un giróscopo para detección de movimiento de la cabeza y algoritmos de control para gestionar las...

    Presentamos en este artículo un sistema de interacción basado en Realidad Aumentada que permite conversar a un personaje virtual controlado por un actor en tiempo real con el público asistente a través de una pantalla de gran formato a modo de espejo aumentado. El sistema integra imágenes de vídeo reales con las imágenes virtuales del avatar y otros objetos animados incorporados como apoyo a la conversación. Para su implementación hemos optado por la exploración y combinación de tecnologías: dos sistemas kinect para captura de movimientos corporales, mapa de profundidad e imágenes reales, un giróscopo para detección de movimiento de la cabeza y algoritmos de control para gestionar las expresiones y emociones del avatar.

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