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Accelerating Volume Animation by Space-Leaping (1993)
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BibTeX
@MISC{Yagel93acceleratingvolume,
author = {Roni Yagel and Zhouhong Shi},
title = {Accelerating Volume Animation by Space-Leaping},
year = {1993}
}
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Abstract
f i In this paper we present a method for speeding the process of volume rendering a sequence o mages. Speedup is based on exploiting coherency between consecutive images to shorten the n path rays take through the volume. This is achieved by providing each ray with information eeded to leap over the empty space and commence volume traversal at the vicinity of mean- - b ingful data. The algorithm starts by projecting the volume into a C-buffer (Coordinates uffer) which stores, at each pixel location, the object-space coordinates of the first non-empty s t voxel visible from that pixel. For each change in the viewing parameters, the C-buffer i ransformed accordingly. In the case of rotation the transformed C-buffer goes through a pro- - b cess of eliminating coordinates that possibly became hidden. The remaining values in the C uffer serve as an estimate of the point where the new rays should start their volume traverc sal. This space-leaping method can be combined with existing accele...
