NDLI: Interactive iso-surface ray tracing of massive volumetric data sets

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Content Provider	ACM Digital Library
Author	Friedrich, H. Günther, J. Marmitt, G. Slusallek, P. Wald, I.
Abstract	The visualization of iso-surfaces from gridded volume data is an important tool in many scientific applications. Today, it is possible to ray trace high-quality iso-surfaces at interactive frame rates even on commodity PCs. However, current algorithms fail if the data set exceeds a certain size either because they are not designed for outof- core data sets or the loading times are too high because there is too much overhead involved in the out-of-core (OOC) techniques. We propose a kD-tree based OOC data structure that allows to ray trace iso-surfaces of large volumetric data sets of many giga bytes at interactive frame rates on a single PC. A LOD technique is used to bridge loading times of data that is fetched asynchronously in the background. Using this framework we are able to ray trace iso-surfaces between 2 and 4 fps on a single dual-core Opteron PC at 640×480 resolution and an in-core memory footprint that is only a fraction of the entire data size.
Starting Page	109
Ending Page	116
Page Count	8
ISBN	9783905673500
ISSN	1727348X
DOI	10.2312/EGPGV/EGPGV07/109-116
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2007-05-20
Publisher Place	Goslar
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Interactive iso-surface ray tracing of massive volumetric data sets