Development of a Method for Computer Animation of Water Droplet Flow

水滴流动计算机动画方法的开发

基本信息

批准号：
11680362
负责人：
KANEDA Kazufumi
金额：
$ 2.11万
依托单位：
Hiroshima University
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-11680362/
关键词：
Computer Graphics Animation Rendering Water droplets Drive simulator Image processing Image composition

项目摘要

This project has developed a method for generating a realistic animation of water droplets, such as the windshield of a vehicle, for example. One of the method's applications can be considered the animation of water droplets on a windshield. a process vital for drive simulators. The proposed method employs a particle system in a discrete environment to calculate the movement of water droplets on a surface, and environment mapping for indicating the property of transparency to quickly render scenes through transparent objects. Fully computer generated animations and video compositions of water droplets on a windshield demonstrate the usefulness of the proposed method1. A method for simulating water droplet flow :To simulate the flow of water droplets, the developed method takes into account the dominant factors acting on the water droplets. such as gravity and interfacial tensions, etc. Extending the method to a three dimensional method, we also developed a method for simulating a water droplet fall in a 3D space.2. A method for compositing water droplets and a video sequence :In generating scenes for driving simulators and movies, it is at times desirable to alter the weather conditions of image sequences taken from a video camera. The project has developed a method for generating a rainy scene from an image sequence taken on a clear day. An image is segmented into three kinds of area : sky, road, and all the other surrounding area, including buildings and trees. Each area is processed in different ways to generate the rainy scene. An image composition method between water droplets and a modified video sequence is also developed. A scene taken from a vehicle driver's seat is applied to demonstrate the usefulness of the developed method.

该项目开发了一种生成逼真的水滴动画的方法，例如车辆的挡风玻璃。该方法的应用之一可以被认为是挡风玻璃上水滴的动画。对于驾驶模拟器来说至关重要的过程。该方法采用离散环境中的粒子系统来计算表面上水滴的运动，并使用环境映射来指示透明度的属性，以通过透明物体快速渲染场景。完全由计算机生成的挡风玻璃上水滴的动画和视频组合证明了所提出方法的有用性1。模拟水滴流动的方法：为了模拟水滴的流动，所开发的方法考虑了作用于水滴的主导因素。如重力和界面张力等。将该方法扩展到三维方法，我们还开发了一种在3D空间中模拟水滴下落的方法。 2．一种合成水滴和视频序列的方法：在生成驾驶模拟器和电影的场景时，有时需要改变从摄像机拍摄的图像序列的天气条件。该项目开发了一种从晴天拍摄的图像序列生成雨景的方法。图像被分割为三种区域：天空、道路和所有其他周围区域，包括建筑物和树木。每个区域都经过不同的处理来生成雨景。还开发了水滴和修改后的视频序列之间的图像合成方法。从车辆驾驶员座椅上拍摄的场景被用来证明所开发方法的有用性。