The Vacuum Buffer
Voicu Popescu, Anselmo Lastra
ABSTRACT
When rendering from depth images, an important and difficult task is selecting
the subset of depth-image samples that need to be warped to generate the
new view.
We present the vacuum-buffer algorithm, and its use within a sample-selection
method. Like other techniques, our method proceeds by considering samples
of reference images that were acquired from locations close to the current
camera position. Additionally, our method offers an estimate of whether
visible surfaces were potentially missed and points to the scene locations
where such surfaces might be. The vacuum buffer is essentially a generalized
z-buffer and it measures what subvolumes of the current view-frustum have
not been seen by any reference image considered so far.
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