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Fast volume rendering using adaptive block subdivision

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2 Author(s)
Choong Hwan Lee ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea ; Kyu Ho Park

We propose a fast volume rendering scheme that greatly reduces ray-casting overheads by adaptive block subdivision. We first apply a uniform space subdivision for constructing the adaptively subdivided volume. Then we merge coherent uniform blocks to generate adaptive-sized blocks that are efficient for leaping space. To accomplish this, an efficient block merging algorithm based on a boundary following and scan-filling strategy is proposed. Experimental results show that our fast volume rendering scheme is superior to other schemes in constructing a data structure for fast rendering; due to its simple construction approach, construction speed is more than three times faster than a hierarchical data structure, the octree. A 25% to 70% performance gain in rendering time over the octree is also exhibited. The additional advantages of our scheme are a stable acceleration for animation and an associativity with a compression-based volume rendering

Published in:

Computer Graphics and Applications, 1997. Proceedings., The Fifth Pacific Conference on

Date of Conference:

13-16 Oct 1997