ISSN 1000-1239 CN 11-1777/TP

• 软件技术 •

### 基于图像的大规模数据集交互可视化

1. (北京应用物理与计算数学研究所 北京 100094) (whk@iapcm.ac.cn)
• 出版日期: 2017-04-01
• 基金资助:
国家自然科学基金项目(61232012)；中国工程物理研究院科学技术发展基金重点基金项目(2014A0403019)；计算物理重点实验室基金项目

### Image-Based Interactive Visualization of Large-Scale Data Sets

Wang Hongkun, Cao Yi, Xiao Li

1. (Institute of Applied Physics and Computational Mathematics, Beijing 100094)
• Online: 2017-04-01

Abstract: With the development of supercomputers, the parallel scale of numerical simulations is increasing exponentially. It is a time-consuming task to visualize the data sets of ever-increasing scale output in the simulations. It is difficult or even impossible to analyze the data sets smoothly, even on a visualization server of high performance. To achieve good interactivity and display effect, an efficient image-based approach is proposed in this paper, and a corresponding software system is also developed. Firstly, typical visual analysis patterns are summarized based on domain knowledge. These patterns can commendably depict inner physical characters in a simulated data field. Secondly, based on these patterns, a set of high-resolution images are pre-generated from large-scale time-varying data sets on a supercomputer. These images are rendered at various viewpoints around the data field and then organized according to the patterns and the time steps. Thirdly, we analyze the simulated data field interactively from these visualization images on a common computer. These visualization images can be observed from different directions by changing the viewpoint interactively. They can also be shown in proper resolution according to the size of the observing window. As a result, the entire time-varying evolution of physical characters can be interactively explored at different viewpoints in proper resolution. The proposed approach does not suffer from large scale of data sets and high computational complexity of visualization and thus significantly improves the visual analysis efficiency for large-scale data sets from the simulations.