动态低采样环境光遮蔽的实时光线追踪分子渲染

doi:10.11896/jsjkx.210200042

计算机科学 ›› 2022, Vol. 49 ›› Issue (1): 175-180.doi: 10.11896/jsjkx.210200042

• 计算机图形学&多媒体 • 上一篇下一篇

动态低采样环境光遮蔽的实时光线追踪分子渲染

李家振, 纪庆革

中山大学计算机学院广州510006
广东省大数据分析与处理重点实验室广州510006

收稿日期:2021-02-04 修回日期:2021-07-01 出版日期:2022-01-15 发布日期:2022-01-18
通讯作者: 纪庆革(issjqg@mail.sysu.edu.cn)
作者简介:lijzh66@mail2.sysu.edu.cn
基金资助:
国家自然科学基金联合基金(U1611263)

Dynamic Low-sampling Ambient Occlusion Real-time Ray Tracing for Molecular Rendering

LI Jia-zhen, JI Qing-ge

School of Computer Science and Engineering,Sun Yat-sen University,Guangzhou 510006,China
Guangdong Province Key Laboratory of Big Data Analysis and Processing,Guangzhou 510006,China

Received:2021-02-04 Revised:2021-07-01 Online:2022-01-15 Published:2022-01-18
About author:LI Jia-zhen,born in 1997,postgraduate.His main research interests include computer graphic and virtual reality.
JI Qing-ge,born in 1966,Ph.D,associate professor,is a member of China Computer Federation.His main research interests include computer graphic,vir-tual reality and computer vision.
Supported by:
Natural Science Foundation of Jiangsu Province,China(BK20141209).

摘要/Abstract

摘要： 分子可视化工作中高质量的分子渲染效果对研究人员观察生物分子结构尤为重要。主流分子可视化工具中常用的光栅化方法渲染效果不佳,不利于研究人员观察分子结构。先进的光线追踪渲染技术可以实现高质量的渲染效果,但目前工具中支持光线追踪的分子渲染方法存在使用平台限制、实时性能不足以及渲染质量不佳的问题。文中提出一种动态低采样环境光遮蔽的实时光线追踪分子渲染方法,其中提出了光线追踪中简易的重投影方法,用于实现动态低采样环境光遮蔽的时间性降噪;以及提出了阴影光线包装策略,改进了光线遍历场景时的计算并行度。实验结果表明,所提方法在个人电脑上可达到实时交互渲染性能,并且在“天河二号”平台上与先进的VMD-OSPRay方法相比,该方法获得了1.40~1.64倍的性能加速,同时改善了动态图像严重的噪点问题。

关键词: 分子可视化, 分子渲染, 光线追踪, 环境光遮蔽, 数据并行

Abstract: High-quality rendering in molecular visualization are particularly important for researchers to observe the structure of biomolecules.The rasterization rendering effect commonly used by mainstream molecular visualization tools is not good.Advanced ray tracing rendering technology can achieve high-quality rendering effects,however,molecular rendering methods that support ray tracing in the current tools have various problems such as platform limitations,insufficient real-performance,and poor rende-ring quality.In this paper,a dynamic low-sampling ambient occlusion real-time ray tracing for molecular rendering is proposed.A simple reprojection method for ray tracing is proposed to implement temporal denoising of low-sampling ambient occlusion in dynamic.We also propose a shadow rays packet strategy to improve the parallelism of calculation when the ray traverses the scene.Experimental results show that our method can achieve interactive rendering performance on PC,and compared with the advanced VMD-OSPRay method on the TH-2 supercomputer,our method achieves performance acceleration of 1.40 to 1.64 times,and improves the serious noise problem of dynamic images.

Key words: Ambient occlusion, Data parallel, Molecular rendering, Molecular visualization, Ray tracing

中图分类号:

TP391

李家振, 纪庆革. 动态低采样环境光遮蔽的实时光线追踪分子渲染[J]. 计算机科学, 2022, 49(1): 175-180. https://doi.org/10.11896/jsjkx.210200042

LI Jia-zhen, JI Qing-ge. Dynamic Low-sampling Ambient Occlusion Real-time Ray Tracing for Molecular Rendering[J]. Computer Science, 2022, 49(1): 175-180. https://doi.org/10.11896/jsjkx.210200042

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动态低采样环境光遮蔽的实时光线追踪分子渲染

Dynamic Low-sampling Ambient Occlusion Real-time Ray Tracing for Molecular Rendering

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