Study on Display System of Natural Phenomena by Using Interactive Computer Graphics

交互式计算机图形学自然现象显示系统的研究

• 批准号: 11680342
• 负责人: NISHITA Tomoyuki
• 金额: $ 2.37万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680342/
• 关键词: Visualization; Natural Phenomena; Computer Graphics; Clouds; Smokes; Cellular Automaton

The research topic of this project is to display realistic rendering of natural phenomena by using Computer Graphics technology. We focus on sky, clouds, smoke, desert scenes and atmospheric effects, such as shafts of light. These phenomena have the common feature that they are consist of the effects of small particles. This research includes the following elements (1) modeling of optical property of natural phenomena, (2) dynamics of natural phenomena, (3) interactive display system of natural phenomena, and (4) evaluation of system performance by using animation.For (1), some of material in real world consists of particles such as sands, air molecules, and water vapor. To create realistic images, physical based simulation and rendering are required. In particular, the color greatly depends on the properties of light scattering due to particles. For (2), the modeling process includes the creation of shapes of objects, their dynamics and their physical properties such as surface reflectance Therefore, a lot of modeling methods have been developed to address this problem. Using these methods, however, obtaining realistic-looking shapes and motion is very time consuming. For the simulation of fluid dynamics for smoke, cellular automata for cloud motion and sand dunes. For (3), the processing speed of graphics hardware has become faster and faster recently. In addition, high performance graphics hardware is available even on low-end PCs. These facts have encouraged us to develop hardware-accelerated methods for rendering realistic images. For (4), we have created the animation videos of natural phenomenaAs a result, we have written nine papers related to this project.

本项目的研究课题是利用计算机图形学技术对自然现象进行真实感绘制。我们专注于天空，云，烟雾，沙漠场景和大气效果，如光线。这些现象有一个共同的特点，即它们都是由小粒子的效应组成的。本研究主要包括以下几个方面：（1）自然现象的光学特性建模;（2）自然现象的动力学;（3）自然现象的交互式显示系统;（4）利用动画对系统性能进行评估。为了创建逼真的图像，需要基于物理的模拟和渲染。特别地，颜色很大程度上取决于由于颗粒引起的光散射的性质。对于（2），建模过程包括创建对象的形状，它们的动态特性和它们的物理属性，如表面反射率。因此，已经开发了许多建模方法来解决这个问题。然而，使用这些方法，获得逼真的形状和运动是非常耗时的。对于烟雾的流体动力学模拟，云运动和沙丘的元胞自动机。对于（3），最近图形硬件的处理速度变得越来越快。此外，高性能图形硬件甚至可以在低端PC上使用。这些事实鼓励我们开发硬件加速的方法来渲染逼真的图像。对于（4），我们制作了自然现象的动画视频，因此，我们已经写了九篇与此项目相关的论文。

项目成果

Y.Dobashi,T.Nishita,H.Yamashita,T.Okita: "Using Metaballs to Modeling and Animate Clouds from Satellite Images"The Visual Computer. 15. 417-482 (1999)

Y.Dobashi、T.Nishita、H.Yamashita、T.Okita：“使用元球对卫星图像中的云进行建模和动画处理”视觉计算机。

Y.Dobashi, T.Nishita, H.Yamashita, T.Okita: "Using Metaballs to Modeling and Animate Clouds from Satellite Images"The Visual Computer. Vol.15. 417-482 (1999)

Y.Dobashi、T.Nishita、H.Yamashita、T.Okita：“使用元球对卫星图像中的云进行建模和动画处理”视觉计算机。

Y.Dobashi, H.Yamashita, T.Okita, T.Nishita: "A Simple, Efficient Method for Realistic Animation of Clouds"Proc.of SIGGRAPH2000. 19-28 (2000)

Y.Dobashi、H.Yamashita、T.Okita、T.Nishita：“一种简单、有效的云真实动画方法”SIGGRAPH2000 论文集。

Y.Dobashi,T.Okita,T.Nishita: "Interactive Rendering of Shafts of Light Using a Harduare-Accelerated Volume Rendering Technique"SIGGRAPH2000 Sketchs & Application, Conference Abstracts and Applications. 219 (2000)

Y.Dobashi、T.Okita、T.Nishita：“使用 Harduare 加速体积渲染技术交互式渲染光轴”SIGGRAPH2000 草图

S.Yoshida,T.Nishita: "Modelling of Smoke Flow Taking Obstacles into Account"Proc.of the 8th Pacific Conference. 31-37 (2000)

S.Yoshida，T.Nishita：“考虑障碍物的烟流建模”第八届太平洋会议论文集。