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Prezentace Mixed Reality Geographical Information System_Pavlišta Jiří

Y04A2Z - Anglický jazyk 2-1

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Location-based Mixed Reality for Mobile Information Services
Research Issues
A number of principal research issues, related to good calibration and registration techniques are being addressed. They include:
Registration of the geographical information with real objects in real-time
Use of mixed reality for spatial visualization at decision points
Integration of visualized geographic information with other location-based services
System Architecture and Functionality
To explore the potential of augmented reality in practice, we have designed a tangible mixed reality interface. An overview of the system architecture at the mobile device side includes a tracking sub-system, camera sub-system, graphical representation sub-system and user-Interface sub-system.
The AR models acquire both the location and orientation information through a client API on the mobile device, which is sent to the server. The server will build and render the scene graph associated with the location selected and return it to the client for portrayal.
Image-based Modelling
The first significant challenge is to model the areas of interest as accurately and realistically as possible. We are modeling the 3D scene around the user by means of image-based modeling techniques. A partner on the project, GeoInformation Group (Cambridge, U.K.) provided a unique and comprehensive set of building height/type and footprint data for London. Subsequently, the 3D models are extruded up from Mastermap building footprints to heights held in the GIG City heights database.
Next, textures are manually captured using a digital camera with five megapixel resolution in order to create a more realistic virtual environment.
Mixed Reality Pre-navigational Experiences
The stereotypical representation for self-localization and navigation is the map, which leads to the assumption that a digital map is also an appropriate environment representation on mobile devices. However, maps are designed for a detached overview (allocentric) rather than a self-

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Vloženo: 26.04.2009

Velikost: 146,00 kB

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