Browsing by Author "Iglesias, R."
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Item Assembly simulation on collaborative haptic virtual environments(2007) Iglesias, R.; Prada, E.; Uribe, A.; Garcia-Alonso, A.; Casado, S.; Gutierrez, T.; Medical Technologies; PROMETAL; CIRMETALCurrently, Virtual Environments (VEs) are used within engineering industry: physical prototypes or mock-ups are replaced by virtual prototypes. Increasingly, these VEs also allow designers and engineers to carry out assembly/disassembly processes and assembly sequences before any physical prototype is built. Moreover, different designers or engineers, which may be situated in the same or in geographically dispersed locations, often collaborate in the design of products. This allows developing more complex products within a shorter time scale and lowered costs. On the other hand, the utilization of haptic feedback has been found to significantly enhance task performance, for instance, in assembly tasks. In this paper we describe an assembly simulation application on a collaborative haptic virtual environment, where several users interact with virtual models to perform assembly operations within the same virtual scene. The paper also summarizes results achieved with experiments which evaluated different collaborative architectures. Furthermore, it reports on the goals that can be achieved and the limitations for haptic collaborative interaction in each case.Item Computer graphics access for blind people through a haptic and audio virtual environment(2004) Iglesias, R.; Casado, S.; Gutiérrez, T.; Barbero, J. I.; Avizzano, C. A.; Marcheschi, S.; Bergamasco, M.; PROMETAL; CIRMETALThis paper describes a new Haptic & Audio Virtual Environment to allow visually impaired people to have access to the three-dimensional graphic computer world through the sense of touch (using a new dual-finger haptic interface) and augmented by audio output and voice commands. Such system has been developed within the European project "GRAB". The new system provides an integrated platform for the design and development of audio-haptic applications in different fields (architecture, art, aeronautics, medicine,..). In order to demonstrate the validity of the approach, the project was specifically focused on the development of three applications for visual impaired people: an adventure game, a city map explorer and a chart explorer. Both the new environment and the applications were tested by visually impaired people with different profiles (congenitally blind, advantageously blind, partially sighted,..) to evaluate the usefulness and potential of these developments. The results of this validation confirm the validity of the system. Overall, it seems the GRAB system is feasible for these kinds of applications, although some features require some adjustments to create future usable tools.