Frontiers of Data and Domputing ›› 2021, Vol. 3 ›› Issue (4): 30-43.doi: 10.11871/jfdc.issn.2096-742X.2021.04.003

• Special Issue: Visualization and Visual Analysis • Previous Articles     Next Articles

Virtual Viewpoint Based Interactive In-situ Visualization of Large-Scale Simulation

SHI Xiaolin1(),BI Chongke1,*(),HUANG Yuanqi1(),DENG Liang2(),WANG Yueqing2(),WANG Fang2()   

  1. 1. College of Intelligence and Computing, Tianjin University, Tianjin 300350, China
    2. China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China
  • Received:2021-06-10 Online:2021-08-20 Published:2021-08-30
  • Contact: BI Chongke E-mail:sxl@tju.edu.cn;bichongke@tju.edu.cn;742023742@qq.com;dengliang11@nudt.edu.cn;yqwang2013@163.com;wwangfang@sina.com

Abstract:

[Objective] In-situ visualization is an effective way to solve the problem of outputting large-scale numerical simulation results to the hard disk for post-processing visualization. However, the current in-situ visualization methods mainly provide browsing mode for experts, which fails to conduct interactive exploration. Therefore, the study of interactive technology for in-situ visualization is essential for helping experts in analyzing the results of numerical simulations. [Methods] We present an interactive in-situ visualization method based on virtual viewpoint to help experts visually explore numerical simulations. Firstly, in order to resolve the problem of incomplete sampling of in-situ visualization images, a virtual viewpoint synthesis method is designed to supplement virtual viewpoint images for 3D reconstruction. Then, based on raw images and the generated virtual viewpoint images, an image stitching method is proposed to show the overall characteristics of in-situ visualization images. Finally, the interactive model can be generated through 3D reconstruction from the stitched images. [Results] In order to demonstrate the effectiveness of the proposed interactive in-situ model, several different numerical simulations are carried out. As a result, the generated in-situ visualization results can be interactively explored by domain scientists. [Limitations] Because that the image processing technology is constantly evolving, we hope to conduct more explorations on combination of in-situ visualization image data and interactive image processing in the future. [Conclusions] In this paper, a virtual viewpoint-based interactive in-situ visualization method is proposed. It can successfully help experts to interactively explore the intermediate output data of large-scale simulation.

Key words: in-situ visualization, interactive operation, image processing