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  • HCI'07: A reconfigurable Immersive Workbench and Wall- System for Designing and Training in 3D Environments

    Gimeno, Jesús; Fernández, Marcos; Morillo, Pedro; Coma, Inmaculada; Pérez, Manuel

    (2007). Article

    Full article.

    Virtual and Augmented Reality have been widely used in many scientific fields for the last two decades in order to visualize complex data and information. Although both techniques are oriented to show users complex 3D environments by means of an intuitive and easy mechanism, they use to become useless to manipulate the information in an intuitive and realistic way. In this paper, we present SOROLLA, a new concept of workbench designed for virtual and augmented reality purposes and specially oriented to the fields of teleeducation and engineering. Unlike other proposals, SOROLLA not only allows an easy utilization and configuration, but also shows a cost-effective immersive visualization...

    Virtual and Augmented Reality have been widely used in many scientific fields for the last two decades in order to visualize complex data and information. Although both techniques are oriented to show users complex 3D environments by means of an intuitive and easy mechanism, they use to become useless to manipulate the information in an intuitive and realistic way. In this paper, we present SOROLLA, a new concept of workbench designed for virtual and augmented reality purposes and specially oriented to the fields of teleeducation and engineering. Unlike other proposals, SOROLLA not only allows an easy utilization and configuration, but also shows a cost-effective immersive visualization system based on off-the-shelf elements. The initial results using our workbench and wall-system show that both efficiency and user satisfaction are higher than the ones obtained using conventional devices.

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  • Analysis of cable model, considering mass and wave oscillations

    García Fernández, I.; Pla Castells, M.; Martínez Durá, R. J.

    (2007). Article

    International e-Conference on Computer Science. Proceedings of the IeCCS2007 2007 Theoretical cable-pulley dynamics models usually lead to computationally expensive numerical models. For this reason, both mass and cable oscillation are usually neglected when efficiency is an issue. Recently a new model has been presented that allows the simulation of cable oscillation and catenary with low computational cost. In this paper, we present a preliminary analysis of the dynamics of the model, based on numerical tests. More precisely, we analyze the influence of the main parameters of the model over its dynamics, taking as a reference the massless models used so far.

    Ignacio García Fernández

  • A Mixed Model for Real-Time, Interactive Simulation of a Cable Passing Through Several Pulleys

    García Fernández, I.; Pla Castells, M.; Martínez Durá, R.J.

    (2007). Article

    AIP Conference Proceedings, AIP 2007, 212-215 A model of a cable and pulleys is presented that can be used in Real Time Computer Graphics applications. The model is formulated by the coupling of a damped spring and a variable coefficient wave equation, and can be integrated in more complex mechanical models of lift systems, such as cranes, elevators, etc. with a high degree of interactivity.

    Ignacio García Fernández

  • Space-frequency quantization using Directionlets

    Velisavljevic, V.; Beferull-Lozano, B.; Vetterli, M.

    (2007). Article

    In our previous work we proposed a construction of critically sampled perfect reconstruction transforms with directional vanishing moments (DVMs) imposed in the corresponding basis functions along different directions, called directionlets. Here, we combine the directionlets with the space-frequency quantization (SFQ) image compression method, originally based on the standard two-dimensional (2-D) wavelet transform (WT). We show that our new compression method outperforms the standard SFQ as well as the state-of-the-art compression methods, like SPIHT and JPEG-2000, in terms of the quality of compressed images, especially in a low-rate compression regime. We also show that the order of...

    In our previous work we proposed a construction of critically sampled perfect reconstruction transforms with directional vanishing moments (DVMs) imposed in the corresponding basis functions along different directions, called directionlets. Here, we combine the directionlets with the space-frequency quantization (SFQ) image compression method, originally based on the standard two-dimensional (2-D) wavelet transform (WT). We show that our new compression method outperforms the standard SFQ as well as the state-of-the-art compression methods, like SPIHT and JPEG-2000, in terms of the quality of compressed images, especially in a low-rate compression regime. We also show that the order of computational complexity remains the same, as compared to the complexity of the standard SFQ algorithm.

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  • Space-Frequency Quantization for Image Compression using Directionlets

    Velisavljevic, V.; Beferull-Lozano, B.; Vetterli, M.

    (2007). Article

  • 11th International Conference on Computing and Decisión Making in Civil and Building Engineering : VALLE®: A highway design system in a virtual reality environment

    Bosch,Carlos; Ballester, f.; Otero, Cesar; Fernández, Marcos; Coma, Inmaculada; Togores, Reinaldo; Pérez, M. Antonia

    (2006). Article

    Herramienta VALLE para la visualización interactiva de carreteras. Approximately 3 years ago, the Spanish company DRAGADOS undertook the creation of a Highway Design program completely integrated in a Virtual Reality environment. Throughout the first months of the year 2006, the version 1.0 of VALLE® (Virtual roAd modeLLEr) is being implanted in the Company. DRAGADOS’ intention was to merge in VALLE® the technical and interactive capacities of a Civil Engineering Computer Aided Design application (like InRoads, Civil 3D, etc.) with the graphic and realistic capacities of Virtual Representation software (such as Virtual Map, RDV or similar) so that the user could directly test modifications...

    Herramienta VALLE para la visualización interactiva de carreteras. Approximately 3 years ago, the Spanish company DRAGADOS undertook the creation of a Highway Design program completely integrated in a Virtual Reality environment. Throughout the first months of the year 2006, the version 1.0 of VALLE® (Virtual roAd modeLLEr) is being implanted in the Company. DRAGADOS’ intention was to merge in VALLE® the technical and interactive capacities of a Civil Engineering Computer Aided Design application (like InRoads, Civil 3D, etc.) with the graphic and realistic capacities of Virtual Representation software (such as Virtual Map, RDV or similar) so that the user could directly test modifications of horizontal alignments, profiles, sections or other elements in an interactive and realistic way. The ability of editing the road layout in a realistic representation of the environment makes VALLE® a valuable aid in the decision making process related to highway design.

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  • Sixth IASTED International Conference. Visualization, Imaging and Image Processing: An authoring tool for driving simulation experiments based on configurable components

    Coma, Inmaculada; Fernández, Marcos; Bayarri, Salvador

    (2006). Article

    Herramienta para el diseño de experimento en simulación de conducción. Designing a driving simulator for experimental or driver training purposes requires creating a number of exercises or scenarios to take measurements of driver’s performance. Those scenarios are difficult to generate. The reason for this complexity is that a database with different related layers must be created and combined. These layers are the visual information (roads and environment), the network topology and logical lanes, and the elements with dynamic behaviour (cars, lights and virtual actors). Some of these dynamic elements have an autonomous behaviour while others need to be controlled to produce repeatable...

    Herramienta para el diseño de experimento en simulación de conducción. Designing a driving simulator for experimental or driver training purposes requires creating a number of exercises or scenarios to take measurements of driver’s performance. Those scenarios are difficult to generate. The reason for this complexity is that a database with different related layers must be created and combined. These layers are the visual information (roads and environment), the network topology and logical lanes, and the elements with dynamic behaviour (cars, lights and virtual actors). Some of these dynamic elements have an autonomous behaviour while others need to be controlled to produce repeatable events. In this paper an approach for generation and control of simulation scenarios, based on configurable components and interfaces to configure them, is introduced. One advantage of this approach is the use of a unique tool for the whole design process (both static and dynamic scenarios) providing graphic interfaces with direct manipulation that make easier the development of simulation applications.

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  • III Congreso internacional de Ciudad y Territorio Virtual: Integración de las técnicas de realidad virtual en el proceso de diseño y revisión de proyectos de infraestructuras viarias: VALLE.

    Fernández, Marcos; Coma, Inmaculada; Otros

    (2006). Article

    Herramienta VALLE para el diseño de estructuras viarias y carreteras el apoyo de las técnicas de visualización 3D. Desde hacia varios años se ha hecho evidente el interés que tienen en el diseño de estructuras viarias y carreteras el apoyo de las técnicas de visualización 3D para tener una idea tanto del aspecto final de un proyecto concreto e incluso poder evaluar su impacto ambiental y estético. Son diversos los paquetes (VirtualMap, RDV u otros similares) que incluyen exportadores o visualizadores de este tipo. No obstante en todos los casos la aparición de las técnicas 3D en algunos casos es para generar simplemente un video de presentación y en otros casos algún vuelo que aunque...

    Herramienta VALLE para el diseño de estructuras viarias y carreteras el apoyo de las técnicas de visualización 3D. Desde hacia varios años se ha hecho evidente el interés que tienen en el diseño de estructuras viarias y carreteras el apoyo de las técnicas de visualización 3D para tener una idea tanto del aspecto final de un proyecto concreto e incluso poder evaluar su impacto ambiental y estético. Son diversos los paquetes (VirtualMap, RDV u otros similares) que incluyen exportadores o visualizadores de este tipo. No obstante en todos los casos la aparición de las técnicas 3D en algunos casos es para generar simplemente un video de presentación y en otros casos algún vuelo que aunque interactivo no permite sino ver y no interactuar con el diseño en cuestión. Sin embargo, en determinados casos, como la revisión de obras o la discusión de proyectos de gran envergadura, seria interesante que la representación 3D interactivo o modelo de realidad virtual permitiese la edición sobre dicho modelo de los diseños de la carretera o infraestructura viaria en cuestión. Siguiendo esta reflexión hace ya tres años dragados se planteo buscar una herramienta que integrase las posibilidad de la edición de carreteras (aunque de forma limitada) con un entorno de realidad virtual 3d interactivo. Fruto de esta búsqueda fue la formación de un grupo de investigación y desarrollo formado por personal de DRAGADOS, la escuela de ingenieros de caminos de la Universidad de Cantabria y el grupo ARTEC del Instituto de Robótica de la Universitat de València. Este equipo con experiencia contrastada tanto en el campo de la ingeniería civil (Universidad de Cantabria) como en la realidad virtual (artec) ha desarrollado el paquete VALLE® para cubrir los requerimiento anteriormente citados.

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  • 2nd world autism congress & exhibition'06: exploring the advantages of augmented reality for intervention in asd

    Herrera, Gerardo; Jordan, Rita; Gimeno, Jesús

    (2006). Article

    Full article.

    Research and practice have demonstrated that both visual and computer mediation of learning is very facilitatory in autism spectrum disorders (ASD). Virtual Reality (VR) has extended and enhanced those benefits but still leaves some more severely affected individuals unable to generalise their learning to new situations. Augmented Reality (AR) Technologies offer new opportunities for providing visual information to people with autism in real (although augmented) situations and have the potential to further facilitate learning. In this paper we explore some ways in which AR can augment the reality seen by the individual with autism that, as we suggest, can be of high educational benefit. We...

    Research and practice have demonstrated that both visual and computer mediation of learning is very facilitatory in autism spectrum disorders (ASD). Virtual Reality (VR) has extended and enhanced those benefits but still leaves some more severely affected individuals unable to generalise their learning to new situations. Augmented Reality (AR) Technologies offer new opportunities for providing visual information to people with autism in real (although augmented) situations and have the potential to further facilitate learning. In this paper we explore some ways in which AR can augment the reality seen by the individual with autism that, as we suggest, can be of high educational benefit. We suggest its use in pretend play training; regarding help on the distinction of the self from others; for augmenting communication and social understanding; for one’s own emotional awareness; for improving attention patterns; for teaching object permanence and for concept development through what we call ‘superimposed pictograms’.

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  • Interacción'06: ENSISAM, un entorno de simulación de situaciones de salvamento marítimo.

    Gimeno, Jesús; Casas, Sergio; Pérez, Manuel; Fernández, Marcos; Coma, Inmaculada

    (2006). Article

    Articulo completo.

    La necesidad de instrucción y evaluación de procedimientos de salvamento marítimo y la imposibilidad de realizar estas tareas en condiciones reales, se puede resolver mediante el uso de técnicas de simulación inmersiva. Este es el caso del entorno ENSISAM, donde además de utilizar técnicas avanzadas de simulación gráfica en tiempo real, se han desarrollado y aplicado elementos de interacción multimodales, así como nuevos dispositivos de diseño propio, creados a partir de las necesidades específicas de los usuarios, como el guante inalámbrico de realidad virtual Thimble-Glove.

 
 
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