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A data distributed, parallel algorithm for ray-traced volume rendering

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4 Author(s)
Ma, K.-L. ; NASA Langley Res. Center, Hampton, VA, USA ; Painter, J.S. ; Hansen, C.D. ; Krogh, M.F.

This paper presents a divide-and-conquer ray-traced volume rendering algorithm and a parallel image compositing method, along with their implementation and performance on the Connection Machine CM-5, and networked workstations. This algorithm distributes both the data and the computations to individual processing units to achieve fast, high-quality rendering of high-resolution data. The volume data, once distributed, is left intact. The processing nodes perform local raytracing of their subvolume concurrently. No communication between processing units is needed during this locally ray-tracing process. A subimage is generated by each processing unit and the final image is obtained by compositing subimages in the proper order, which can be determined a priori. Test results on the CM-5 and a group of networked workstations demonstrate the practicality of our rendering algorithm and compositing method

Published in:

Parallel Rendering Symposium, 1993

Date of Conference:

25-26 Oct 1993

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