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One of the main goals of anywhere augmentation is the development of automatic algorithms for scene acquisition in augmented reality systems. In this paper, we present Envisor, a system for online construction of environment maps in new locations. To accomplish this, Envisor uses vision-based frame to frame and landmark orientation tracking for long-term, drift-free registration. For additional robustness, a gyroscope / compass orientation unit can optionally be used for hybrid tracking. Thedoi:10.1109/vr.2008.4480745 dblp:conf/vr/DiVerdiWH08 fatcat:j23367bwuvesfblmc74aotqwea