| Presentation | 2012/1/12 Measurement and Analysis of Omni-directional Spectral Distributions of Light-Sources in a Natural Scene Daiki WATANABE, Keita HIRAI, Takahiko HORIUCHI, Shoji TOMINAGA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This report shows a multi-band imaging system for capturing omni-directional spectral distributions in the visible range and analyzes the omni-directional illuminant spectra in real outdoor scenes. First, a multi-band imaging system with six spectral channels is constructed by combining a fisheye lens, an RGB digital SLR camera, and additional two color filters. The omni-directional illuminants are estimated from the captured omnidirectional multi-band images. Second, we analyze the 61-dimensional spectral features of a scene from the spectral distribution of omni-directional light sources. We show that the omni-directional illuminant distributions in different seasons and different time in a day can be described in a linear combination of three principal components. As the result, the characteristics of omni-directional illuminant spectra were similar, regardless of seasonal modulation and temporal change in a day. In addition, all spectral images can be compressed and decompressed by using the average basis of all spectral distributions. |
| Keyword(in Japanese) | (See Japanese page) |
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| Paper # | Vol.2012-CVIM-180 No.57 |
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| Committee | MVE |
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| Conference Date | 2012/1/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Media Experience and Virtual Environment (MVE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Measurement and Analysis of Omni-directional Spectral Distributions of Light-Sources in a Natural Scene |
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| 1st Author's Name | Daiki WATANABE |
| 1st Author's Affiliation | Graduate School of Advanced Integration Science, Chiba University() |
| 2nd Author's Name | Keita HIRAI |
| 2nd Author's Affiliation | Graduate School of Advanced Integration Science, Chiba University |
| 3rd Author's Name | Takahiko HORIUCHI |
| 3rd Author's Affiliation | Graduate School of Advanced Integration Science, Chiba University |
| 4th Author's Name | Shoji TOMINAGA |
| 4th Author's Affiliation | Graduate School of Advanced Integration Science, Chiba University |
| Date | 2012/1/12 |
| Paper # | Vol.2012-CVIM-180 No.57 |
| Volume (vol) | vol.111 |
| Number (no) | 380 |
| Page | pp.pp.- |
| #Pages | 6 |
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