Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Experiment in geometry

TUV had a one-week test run with two selected high school groups, who regularly visited our lab and worked with the system under the guidance of a teacher and our technical support. Tests were run in two computer labs located on two different floors. The function of the first and main laboratory was to accommodate the immersive Construct3D set-up, where 2 students collaboratively solved a task. The students wore Head-Mounted Displays and used 2 tracked Personal Interaction Panels and tracked pens to interact with the system. A teacher kept monitoring the students’ progress on a control screen appearing on a BARCO table.

The control screen contained the same virtual scene as that of the students but featured a video background rendering a live video stream of a tracked observer camera that the teacher could position arbitrarily. Since the tracking system knew the exact location and orientation of the camera, the virtual objects including the objects of the mathematical problem and the interaction devices were aligned with the real world and rendered correctly. The students and the teacher were all wearing headsets consisting of headphones and a microphone so that they could communicate with the students sitting in the other laboratory serving as observers and advisors. These students did not have a teacher, just received technical help from technicians, so they worked independently and under no guidance.

They received the mathematical problem that the students working with the immersive set-up in the 1st lab had to solve, so they could provide active help using voice chat with the audio-conferencing module and collaboratively drawn notes with the shared whiteboard module. The 2nd lab also featured a control screen appearing on another BARCO table. This BARCO table showed exactly the same images as the 1st BARCO control screen in the 1st lab. The live video background was transmitted using a videoconferencing module built into the Studierstube collaborative AR framework, while the virtual objects were rendered locally exploiting tracking data sent by the tracking server, thus resulting in much clearer images compared to a solution transmitting video stream containing the already composite images. During the geometry experiment the general platform communication and collaboration tools were well exploited besides the active use of the ESS machines.

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Vienna University of Technology
Favoritenstr. 9-11/188/2
A-1040 Vienna
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