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Erschienen in: Journal of Visualization 3/2021

03.01.2021 | Regular Paper

A composition-free parallel volume rendering method

verfasst von: Jiamin Wang, Chongke Bi, Liang Deng, Fang Wang, Yang Liu, Yueqing Wang

Erschienen in: Journal of Visualization | Ausgabe 3/2021

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Abstract

In the in situ visualization of large-scale simulation, if using the traditional sort-last parallel rendering method, the performance cannot be fully improved due to the heavy communication cost in the final stage: compositing of images. In order to resolve this problem, in this paper, we proposed a composition-free parallel volume rendering method. This is achieved by our proposed hybrid parallelization based on the image space partition and octree-based data space partition. Firstly, in the data distribution stage, an octree structure decoupled from volume representation was proposed, which only stored the indicts of sub-blocks, the adjacent sub-blocks, and the space coordinate information of its bounding box. Before rendering, to avoid the compositing stage, a ray-data intersection list was created for each pixel, which sorted by visibility order and identified NON-EMPTY sub-blocks along the ray. Then in the rendering stage, to improve the efficiency of rendering, a ray-data intersection lists-based rendering method was proposed. Finally, we only need to align the partial images to form the final output image. No compositing process is necessary in our parallel volume rendering method. In order to demonstrate the efficiency of our approach, two existing volume rendering methods have been carried out to compare with our composition-free method.

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Metadaten
Titel
A composition-free parallel volume rendering method
verfasst von
Jiamin Wang
Chongke Bi
Liang Deng
Fang Wang
Yang Liu
Yueqing Wang
Publikationsdatum
03.01.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Visualization / Ausgabe 3/2021
Print ISSN: 1343-8875
Elektronische ISSN: 1875-8975
DOI
https://doi.org/10.1007/s12650-020-00719-x

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