3.1.1 Remote 3D Annotation and Screen Lock
Mechanism with Live Preview
The design challenge for remote 3D annotation is the constant
head movement of the HoloLens user that the remote viewer from
a companion device has to accommodate. When the companion
view is constantly in motion, it is difficult to leave accurate
annotations. To resolve this issue, we introduce a screen lock
mechanism. Once the companion device user starts drawing onto
the scene, their view of the AR space is locked to that scene in
space and time. The companion user is able to annotate that fixed
snapshot without becoming distracted by the continued change of
scene dictated by the primary user. While the scene feels
suspended, the annotation is sent back into the AR space for the
HoloLens user to see. In other words, the HoloLens user sees a
live update of the annotations created by the remote participant
relative to the live, continuously updated view of the HoloLens
user.
To maintain situational awareness of the view of the HoloLens
user despite being in suspended view of a static frame of the
space, the companion user receives a continuous stream of the
current perspective of the HoloLens user via a Picture-in-Picture
(PiP) window. (See Figure 4 for an illustration of the screen lock
method).