Week 6 Summary
The Importance of Stereo and Eye-Coupled Perspective for Eye-Hand Coordination in Fish Tank VR
This paper investigates and discusses the relative importance of stereo and eye coupled perspective for eye-hand coordination in a virtual reality system.
The authors first introduce the importance of stereo, correct perspective and active touch in virtual reality by reviewing a lot of prior works. Both stereoscopic disparity and motion parallax are very important for visualizing the positions of objects.
Then the authors talk about the experiment for the evaluation of correct perspective and stereoscopic depth for tapping task. The experiment was done by conducting several Fitts’ Law taping tasks with a VR system using “fish tank VR” technologies. In their experiment, they used LCD shutter glasses to provide stereoscopic display. Another factor, the correct perspective image to each eye was provided by tracking the position and orientation of the shutter glasses. There was also a PHANToM 1.0 to provide hand operation. The experiment tasks were some kind of Fitts’ Law tapping tasks. The subjects needed to tap the tops of a series of cylinder of different sizes in the virtual environment. Each trial contains 12 tapping from one target to another target. To compare the importance of stereo and motion parallax, experiments were taken under 3 kind of condition: S or noS, HT or noHT and the index of difficulty. The mean time per tap was used for evaluating the result.
The result shows that both stereo and head tracking help with decrease the per tap time but stereo has more advantage when task difficulty increases. The result also indicates that the head tracking cannot help to adjust the task more quickly.
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