Demo Abstract: Welcome to My World: Demystifying Multi-User AR with the Cloud

We demonstrate multi-user persistent Augmented Reality (AR) on mobile devices with a novel technique that provides nearly instant acquisition of location and orientation. Visual Inertial Odometry (VIO) provides accurate position and orientation tracking relative to device start-up for AR applications. Unfortunately, the tracking is local to the AR session of a single user and is not anchored in a global coordinate system. In order to provide all devices an accurate location in a common frame of reference, we utilize UWB nodes that range to the devices. To avoid the long startup time required to compute the device's orientation, we propose a novel technique that utilizes previously recorded magnetic field information to rapidly calibrate the compass. In order to simplify setup, we demonstrate automatic mapping of beacon locations and surveying of magnetic field by a pedestrian walking around the test area with a mobile device.