| Project/Area Number |
11680362
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
計算機科学
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| Research Institution | Hiroshima University |
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Principal Investigator |
KANEDA Kazufumi Faculty of Engineering, Hiroshima University, Assistant Professor, 工学部, 助教授 (30185946)
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| Co-Investigator(Kenkyū-buntansha) |
NOGUCHI So Faculty of Engineering, Hiroshima University, Research Associate, 工学部, 助手 (30314735)
YAMASHITA Hideo Faculty of Engineering, Hiroshima University, Professor, 工学部, 教授 (70034379)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2000: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Computer Graphics / Animation / Rendering / Water droplets / Drive simulator / Image processing / Image composition |
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| Research Abstract |
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 method
1. 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.
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