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A useful function of augmented reality (AR)

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Context-aware computers rely o n user and physical models t o describe the context of a user. In this paper, we focus on the problem of developing and maintaining a physical model of the environment using a mobile computer. W e describe a set of tools f o r automatically creating and modifying three-dimensional contextual information. The tools can be utilized across multiple hardware platforms, with different capabilitaes, and operating in collaboration with one another. W e demonstrate the capabilities of the tools using two mobile platforms. One of them, a mobile augmented reality system is used t o construct a geometric model of a n indoor environment which is then visualized o n the same platform.

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Scientific and Engineering Solutions. 1 All the pictures for the AR system in this paper were captured by mixing the output of our AR system together with data from a video camera. The low quality of the images is due to limitations with the current camera and video mixer configuration. If this paper is accepted, we shall obtain better images.