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The Wearable Active Camera/Laser (WACL) allows the remote collaborators not only to set their viewpoints into the wearer's workplace independent of the wearer's motion but also to point to real objects directly with the laser spot. In this paper, we report an user test to examine the advantages and limitations of the WACL interface in remote collaboration by comparing a head-mounted display and a headmounted camera-based headset interface. Results show that the WACL gives better impressions on comfortability when wearing, eye-friendliness, and fatigue in spite of no significant difference in task completion time. We first review related works and user studies with wearable collaborative systems, and then describe the details on the user test.

We propose a wearable active camera with laser pointer (WACL) as a human interface device for use in telecommunications. The WACL laser pointer is attached to the active camera-head and it can point a laser spot while elevating and panning the camera-head. In our system, a remote instructor can observe around the worker, who is wearing the WACL, independently of the worker's motion, and can clearly and naturally instruct the worker in tasks by pointing the laser spot at real objects. This paper describes the outline of a telecommunication support system using the WACL and a method to stabilize the camera and laser pointer independently of the wearer's motion. We have implemented and demonstrated an example of an application using our system.

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