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Summary: The International Journal of Virtual Reality, 2009, 8(X):Y-Z 1
Abstract-- Recent developments in occlusion management for
3D environments often involve the use of dynamic transparency, or
"virtual X-ray vision", to promote target discovery and access in
complex 3D worlds. However, there are many different approach-
es to achieving this effect and their actual utility for the user has
yet to be evaluated. Furthermore, the introduction of semi-
transparent surfaces adds additional visual complexity that may
actually have a negative impact on task performance. In this
paper, we report on an empirical user study investigating these
human aspects of dynamic transparency. Our implementation of
the technique is an image-space algorithm built using modern
programmable shaders to achieve real-time performance and
visually pleasing results. Results from the user study indicate that
dynamic transparency provides superior performance for
perceptual tasks in terms of both efficiency and correctness.
Subjective ratings are also firmly in favor of the method.
Index Terms--About four key words or phrases in alphabetical
order, separated by commas.
I. INTRODUCTION
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