| Presentation | 2010-10-21 Veiling Light Source Model and Shadow Impact Estimate of Large Scale Building Noriyuki UDA, Yoshitaka KAMIYA, Shigeki Yokoi, Takami Yasuda, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The large scale building has shadow impact on wide area. Its shadow is often consisted of penumbra (hard shadow) and umbra (soft shadow) with shade gradients. The shadow size and luminance distribution are depended on the solar position, project distance and atmospheric condition on that time. In shadow simulation, penumbra due to direct sunlight and umbra by illuminant effect of skylight are calculated individually and are synthesized afterward. This usual method could not forecast the luminance structure on shadow of building with complex structure. In this study, we proposed and easy and effective method to forecast the shadow impact and produce shadow image with luminance gradients. We made a veiling light source, which produced by applying Gauss filter on the sun image. Veiling light source was used as mapping light source in global illuminant environment. In this model, the atmospheric condition is expressed by mean and variance of Gauss equation. The variation of shadow could be expressed corresponding to the change of sun ray diffusion. In this model, the shadow luminance on the project face could be calculated by inverse ray tracing method. It is valid as a method of forecasting shadow impacts. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | shadow simulation / penumbra (hard shadow) / veiling light source |
| Paper # | MVE2010-53 |
| Date of Issue |
| Conference Information | |
| Committee | MVE |
|---|---|
| Conference Date | 2010/10/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Media Experience and Virtual Environment (MVE) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Veiling Light Source Model and Shadow Impact Estimate of Large Scale Building |
| Sub Title (in English) | |
| Keyword(1) | shadow simulation |
| Keyword(2) | penumbra (hard shadow) |
| Keyword(3) | veiling light source |
| 1st Author's Name | Noriyuki UDA |
| 1st Author's Affiliation | Nagoya Sangyo University() |
| 2nd Author's Name | Yoshitaka KAMIYA |
| 2nd Author's Affiliation | Nagoya Sangyo University |
| 3rd Author's Name | Shigeki Yokoi |
| 3rd Author's Affiliation | Graduate School of Nagoya University Chikusa |
| 4th Author's Name | Takami Yasuda |
| 4th Author's Affiliation | Graduate School of Nagoya University Chikusa |
| Date | 2010-10-21 |
| Paper # | MVE2010-53 |
| Volume (vol) | vol.110 |
| Number (no) | 238 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |