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Parallel processing of the shear-warp factorization with the binary-swap method on a distributed-memory multiprocessor system

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4 Author(s)
Sano, K. ; Graduate Sch. of Inf. Sci., Tohoku Univ., Sendai, Japan ; Kitajima, H. ; Kobayashi, H. ; Nakamura, T.

Volume rendering is an efficient tool for analyzing and understanding volumetric data in many scientific applications such as medical imaging and computational fluid dynamics. The paper presents a data-parallel volume rendering algorithm for shear-warp factorization of the viewing transformation with the binary-swap compositing method to achieve real-time rendering. This algorithm is suited to distributed-memory multiprocessor systems with a message-passing mechanism. Volume is subdivided into subvolumes to be allocated to PEs. Each PE shears an allocated subvolume and generates a subvolume image from the sheared subvolume in parallel. In order to carry out fast compositing of subvolume images, the binary-swap method is employed, which can keep the overheads due to compositing low. The authors implement the parallel shear-warp factorization algorithm with binary-swap compositing on the IBM SP2 with 32 PEs, and show volume rendering of 2562×128 to 2563 voxels for a screen of 2562 pixels at 15 to 22 frames/sec. As a result, message-passing multiprocessor systems using the algorithm are also suitable for achieving real-time volume rendering

Published in:

Parallel Rendering, 1997. PRS 97. Proceedings. IEEE Symposium on

Date of Conference:

20-21 Oct 1997

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