Remote collaboration using real-world projection interface

Under a remote collaboration demanding multiple fieldworkers, using a head-set interface composed from HMD and HMC in a situation of that only one wearable interface is allowed using in a field, there might be discrepancies in the transmission of instructions among the field workers and a remote expert because a worker without the interface of remote collaboration have to receive sidelong instructions from the remote expert via another worker with the interface. We expect that a real-world projection device, such as WACL, absorbs the discrepancies because the projected information can be watched by the people around the projection device. Therefore, we conduct a user study comparing the head-set interface and WACL interface to measure burdens of transmission of instructions under a remote collaboration demanding multiple field workers. The result shows that HMD is a display for single-user imposes more burdens on interface-wearer when forwarding remote instructions to non-interface-worker. On the other hands, a real world projection interface can reduce the burdens. Also, we found that direct instructions with a laser spot of WACL and sidelong instructions by the interface-wearer´s hand via HMD has same task performance in a simple pick-up-and-put task. Furthermore, by the effect of view controllability and information-browsability of WACL, non interface-workers can receive instructions from the remote expert directly, and carry out the instructions even when the interface-wearer is working.