Lightness perception based on perception of shadow and perceived brightness
Project/Area Number |
25730166
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Kansei informatics
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Research Institution | Ritsumeikan University |
Principal Investigator |
TOKUNAGA RUMI 立命館大学, 立命館グローバル・イノベーション研究機構, 研究員 (80573914)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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Keywords | 影の知覚 / 空間の明るさ感 / 照明の認識 / 輝度勾配 / 明度知覚 / 明るさ知覚 / 多次元尺度構成法 / 照明認識 |
Outline of Final Research Achievements |
We see shadows everywhere. Shadows are the visual response to an absence of light, in other words, all shadows are intangible. We usually don’t pay attention to shadows, but we sometime can aware that a space is brightly illuminated by seeing dark shadows. It is not revealed how shadow affects our brightness perception of a space. In this research, we tested whether the perception of shadow affects the perception of brightness of a space. Using multidimensional scaling we analyzed the dissimilarity structure produced by different intensity of illuminances and shadows. Experimental results showed that the apparent brightness of the space was proportional to the intensity of illuminance and to the shades of shadow. It indicates that our visual system uses information of shades of shadow to estimate the apparent brightness of the space.
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Report
(4 results)
Research Products
(9 results)
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[Presentation] Categorical color clusters of Japanese color lexicon2015
Author(s)
Ichiro Kuriki, Yumiko Muto, Kazuho Fukuda, Rumi Tokunaga, Delwin Lindsey, Angela Brown, Keiji Uchikawa, and Satoshi Shioiri
Organizer
International Color Vision Society
Place of Presentation
Tohoku University, Sendai city, Japan
Year and Date
2015-07-03
Related Report
Int'l Joint Research
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