Efficient Synthetic Light Field Rendering on Heterogeneous Systems Using a Pipeline-Based Runtime Design
Chih-Chen Kao, Liang-Chi Tseng, Wei Chung Hsu

Conference
Best paper award finalist

Venue

RACS 2017

Abstract

The research interest of real-time global illumination has increased due to the growing demand of graphics applications such as virtual reality. Recently, the design that combines Image-based rendering (IBR) and Ray-Tracing to create Synthetic Light Field (SLF) has been widely adopted to provide delicate visual experience for multiple viewpoints at an acceptable frame rate. However, despite its parallel characteristic, constructing a SLF is still inefficient on modern Graphics Processing Unit (GPU) due to the irregularities. For instance, the issues caused by branch divergence, early-termination and irregular memory access prolong the execution time that cannot be simply resolved by workload merging. In this paper, we proposed a Runtime design that reorganizes the execution into a pipeline-based pattern with grouping of primary rays. With this approach, the number of valid rays can be maintained at a high level with less divergence of paths. Based on the experiment on a heterogeneous system, the throughput becomes 2.48 times higher than the original on average.

Author Links

1. 高至辰
PhD student
2. 曾亮齊
Master student
3. 徐慰中
Advisor

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Cite This Paper

Chih-Chen Kao, Liang-Chi Tseng, Wei Chung Hsu:
Efficient Synthetic Light Field Rendering on Heterogeneous Systems Using a Pipeline-Based Runtime Design RACS 2017
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