Visual Quality Adjustment for Volume Rendering in a Head-Tracked Virtual Environment

IEEE Transactions on Visualization and Computer Graphics
Claudia HänelTorsten Kuhlen

Abstract

To avoid simulator sickness and improve presence in immersive virtual environments (IVEs), high frame rates and low latency are required. In contrast, volume rendering applications typically strive for high visual quality that induces high computational load and, thus, leads to low frame rates. To evaluate this trade-off in IVEs, we conducted a controlled user study with 53 participants. Search and count tasks were performed in a CAVE with varying volume rendering conditions which are applied according to viewer position updates corresponding to head tracking. The results of our study indicate that participants preferred the rendering condition with continuous adjustment of the visual quality over an instantaneous adjustment which guaranteed for low latency and over no adjustment providing constant high visual quality but rather low frame rates. Within the continuous condition, the participants showed best task performance and felt less disturbed by effects of the visualization during movements. Our findings provide a good basis for further evaluations of how to accelerate volume rendering in IVEs according to user's preferences.

References

Nov 8, 2005·IEEE Transactions on Visualization and Computer Graphics·Catherine A ZanbakaLarry F Hodges
Nov 10, 2006·IEEE Transactions on Visualization and Computer Graphics·Chaoli WangHan-Wei Shen
May 9, 2008·IEEE Transactions on Visualization and Computer Graphics· PrabhatMel Slater
Jan 5, 2010·Nature Reviews. Neuroscience·Karl Zilles, Katrin Amunts
Mar 10, 2012·IEEE Transactions on Visualization and Computer Graphics·Bireswar LahaDoug A Bowman
May 9, 2014·IEEE Computer Graphics and Applications·Steven BirrBernhard Preim
May 23, 2014·Frontiers in Neuroinformatics·Claudia HänelTorsten Kuhlen
Sep 12, 2015·IEEE Transactions on Visualization and Computer Graphics·Steffen FreyThomas Ertl
Dec 1, 2012·IEEE Transactions on Visualization and Computer Graphics·M HadwigerH Pfister

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