Lightness - Made

Japanese: 明度 - めいど
Lightness - Made

A color attribute, which indicates the brightness of an object's color. Color has three attributes: brightness, hue (red, green, blue, etc.), and chroma (color saturation). Both chromatic colors (colors with a hue) and achromatic colors (white, gray, black) have brightness. In the Munsell color system used to indicate color, brightness is expressed by the Munsell value (symbol V). V is set to 10 for white with a luminous reflectance (symbol Y) of 102.56%, 0 for black with a luminous reflectance of 0%, and the values ​​between them are scaled in equal steps, such as 9, 8, ..., 1, according to the perception of brightness. The achromatic color scale, created by arranging achromatic color chips in a row in the order of V, is useful for determining the brightness of an object's color, like a ruler for length.

[Takashi Azuma]

[Reference item] | Color

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

色の属性の一つで、物体色の明暗を表すこと。色には明度、色相(赤、緑、青など)および彩度(色の飽和性)という三属性があり、明度は有彩色(色相のある色)にも無彩色(白、灰色、黒)にもある。色の表示に使われるマンセル表色系では、明度をマンセル・バリュー(記号V)で表す。Vは、視感反射率(記号Y)が102.56%の白を10とし、0%の黒を0として、その間を明るさ感覚に従って9、8、……、1のように等歩度に刻む。無彩色の色票をVの順に一列に並べてつくった無彩色スケールは、あたかも長さに対する物差しのように、物体色の明度を判定する場合に役だっている。

[東 尭]

[参照項目] |

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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