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- W2120675281 abstract "In this paper we treat design philosophies and enabling technologies for ambient awareness within grids of future mobile computing/communication devices. We extensively describe the possible context sensors, their required accuracies, their use in mobile services—possibly leading to background interactions of user devices—as well as a draft of their integration into an ambient aware device. We elaborate on position sensing as one of the main aspects of context aware systems. We first describe a maximum accuracy setup for a mobile user that has the ability of Augmented Reality for indoor and outdoor applications. We then focus on a set-up for pose sensing of a mobile user, based on the fusion of several inertia sensors and DGPS. We describe the anchoring of the position of the user by using visual tracking, using a camera and image processing. We describe our experimental set-up with a background process that, once initiated by the DGPS system, continuously looks in the image for visual clues and—when found—tries to track them, to continuously adjust the inertial sensor system. We present some results of our combined inertia tracking and visual tracking system; we are able to track device rotation and position with an update rate of 10 ms with an accuracy for the rotation of about two degrees, whereas head position accuracy is in the order of a few cm at a visual clue distance of less than 3 m." @default.
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- W2120675281 date "2003-07-01" @default.
- W2120675281 modified "2023-09-23" @default.
- W2120675281 title "Philosophies and technologies for ambient aware devices in wearable computing grids" @default.
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- W2120675281 doi "https://doi.org/10.1016/s0140-3664(02)00249-9" @default.
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