Display of Surfaces from Volume Data
IEEE Computer Graphics and Applications
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The Visual Computer: International Journal of Computer Graphics
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EGGH'95 Proceedings of the Tenth Eurographics conference on Graphics Hardware
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EGGH'95 Proceedings of the Tenth Eurographics conference on Graphics Hardware
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EGGH'95 Proceedings of the Tenth Eurographics conference on Graphics Hardware
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EGGH'95 Proceedings of the Tenth Eurographics conference on Graphics Hardware
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HWWS '97 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
PAVLOV: a programmable architecture for volume processing
HWWS '98 Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware
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VIRIM, a real-time direct volume rendering system is evaluated for medical applications. Experiences concerning the hardware architecture are discussed. The issues are the flexibility of VIRIM, the restriction to two gradient components only, the duplication of the volume data sets on different modules, the size of the volume data set, the gray-value segmentation tool, and the support of algorithmic improvements like space-leaping, early ray-termination and others. It turned out that flexibility is the main benefit and absolutely necessary for VIRIM. Given this flexibility the application areas of real-time rendering systems increase dramatically: Most of the user requirements focus now not on visualization but on general volume data processing. The most serious bottleneck of VIRIM is the limited volume memory that is integrated on the first prototype. The most frequently used tool of VIRIM is gray-value segmentation. It is highly useful if original, i.e. unsegmented data have to be dealt with, and if pre-segmented data have to be investigated. All other benefits and architectural shortcomings are not critical for the application areas of VIRIM, i.e. operation simulation and control in head surgery.