Abstract
We present a 3D referencing technique tailored for remote maintenance tasks in augmented reality. The goal is to improve the accuracy and efficiency with which a remote expert can point out a real physical object at a local site to a technician at that site. In a typical referencing task, the remote expert instructs the local technician to navigate to a location from which a target object can be viewed, and then to attend to that object. The expert and technician both wear head-tracked, stereo, see-through, head-worn displays, and the expert's hands are tracked by a set of depth cameras. The remote expert first selects one of a set of prerecorded viewpoints of the local site, and a representation of that viewpoint is presented to the technician to help them navigate to the correct position and orientation. The expert then uses hand gestures to indicate the target.