Effect of the Highest Lightness on the Brightness Size of the Recognized Visual Space of Illumination

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概要

• 論文の詳細を見る

• We have proposed a new estimation method for a perceived brightness of a room based on the concept of the recognized visual space of illumination, or RVSI. We use the term 'brightness size' of the RVSI to express an observer's perception of the intensity of illumination. We define the border luminance between the surface color and the unnatural surface color modes as the brightness size of the RVSI. Our previous work showed that the border luminance was proportional to the illuminance of a room and that was equal to the luminance of the brightest object in the room. We measured the border luminance in two differently decorated rooms to test the effect of the highest lightness of the object. One room was furnished with white walls and various lightness objects from black to white (environment N). The other was furnished with black walls and objects whose Munsell Values were 5 or less (environment L). Although the illuminances of the two rooms were the same, the border luminance in environment L was a half of that in environment N. Contrary to our previous result, the border luminance in environment L was higher than the luminance of the brightest object. We also compared the border luminance among between three different positions where the local contrast and the local illuminance were different. The border luminance was almost constant regardless of the measuring position, suggesting that the local environments have little effect on the perceived brightness of a room.

• 社団法人照明学会の論文

著者

• Yamaguchi H

  Gunma Univ. Gunma

• Ikeda Mitsuo

  Ritsumeikan University

• Yamaguchi H

  Electrotechnical Lab. Ibaraki Jpn

• Yamaguchi H

  Inst. Physical And Chemical Res. (riken) Saitama

• Yamaguchi H

  Akita Prefectual University

• Ikeda M

  Ritsumeikan University

• SHINODA Hiroyuki

  Ritsumeikan University

• Yamaguchi H

  Ritsumeikan University

• YAMAGUCHI Hideki

  Ritsumeikan University

• Shinoda H

  Ritsumeikan University

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