SynchronizAR

Bag of World Anchors for Instant Large-Scale Localization

“…Each participant can manipulate every object's pose. Without external infrastructure to establish inter-participant registration, such features can be expensive to build and maintain, sometimes requiring custom hardware [19]. However, we rely on the matching of BOWA to seamlessly register the participant's spaces.…”

A Quest for Co-Located Mixed Reality: Aligning and Assessing SLAM Tracking for Same-Space Multi-User Experiences

“…2.1.1 Alignment using Features, GNSS. SynchronizAR [22] demonstrated how ad-hoc co-located experiences could be constructed spontaneously and implicitly. They used Ultra-Wide Bandwidth (UWB) modules attached to each MR device, providing distance measurements between all devices in the co-located session, which in turn allowed for the positions (relative to each other) of the MR devices to be resolved.…”

“…For headset-based devices in particular, the same mechanisms by which they track controllers, through embedded IR LEDs with frequency-encoded information, could be used to allow for the tracking of other headsets in a co-located space without necessitating the transfer of point-cloud data or manual alignment -there is no technical impediment preventing a Quest headset from, for example, detecting the position of other controllers in the same play area, and the position of other headsets is known in relation to these controllers. Other signals in the environment could also be used for alignment, much as SynchronizAR [22] used Ultra-Wide Bandwidth distance measurements, for example using triangulation-based localisation techniques to create an alignment, with varying margins for error that might be acceptable for specific use cases. In the end, such solutions may just be stop-gaps, but for specific use cases and user groups these solutions might be more pertinent routes toward immediate ad-hoc co-location.…”