Influence Evaluation for Color Change Caused by Inter-reflection in an Idealized Infinite Interior

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  • 室内照明空間における相互反射光の色彩変化に与える影響評価
  • シツナイ ショウメイ クウカン ニ オケル ソウゴ ハンシャコウ ノ シキサイ

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Abstract

Recently, computer graphics such as “ray tracing” has been often used for various lighting systems, in order to estimate lighting system designs. However, in a conventional ray tracing method, it was difficult to deal with diffusely reflected light. Therefore, there was a problem that synthesized images were more or less unnatunal.<BR>To overcome the problem, a new technique such as radiosity method or bidirectional ray tracing method has been proposed. By one of the above method, diffusely reflected light can be considered in the computer graphics. On the other hand, there are a few studies which examine quantitatively the influence on color change caused by the inter-eflection.<BR>In the present paper, Monte Carlo simulation was used for the calculation of spectral luminous exitance in an interior of model room with infinite length. The color of a ceiling and a floor was assumed to be white, and that of walls was assumed to be white, red or blue. Then we study the difference of spectral luminous exitance among these models.<BR>The results show that the spectral luminous exitance of a ceiling and a floor changed together with color change of a wall, even if the same light source was used.

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