Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Accuracy measures for evaluating computer pointing devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Interactive stereoscopic display for three or more users
Proceedings of the 28th annual conference on Computer graphics and interactive techniques
See-through techniques for referential awareness in collaborative virtual reality
International Journal of Human-Computer Studies
Visual consistency in rotational manipulation tasks in sheared-perceived virtual environments
EGVE'07 Proceedings of the 13th Eurographics conference on Virtual Environments
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In a common application scenario, large screen projection-based stereoscopic display systems are not used by a single user alone, but are shared by a small group of people. Using multiviewpoint images for multiuser interaction does not require special hardware and scales transparently with the number of colocated users in a system. We present a qualitative and quantitative study comparing usability and interaction performance for multiviewpoint images to non-head-tracked and head-tracked interaction for ray-casting selection and in-hand object manipulation. Results show that while direct first-person interaction in projection-based displays without head-tracking is difficult or even completely impractical, interaction with multiviewpoint images can produce similar or even better performance than fully head-tracked interaction. For ray-casting selection, interaction with multiviewpoint images is actually up to 10 percent faster than head-tracked interaction. For in-hand object manipulation in a simple docking task, multiviewpoint interaction performs only about 6 percent slower than fully head-tracked interaction.