...Once these are determined, the chromaticity coordinates x and y can be calculated using x = X /( X + Y + Z ), y = Y /( X + Y + Z ) and plotted on an xy chromaticity diagram. They can also be converted and plotted on a u'v ' uniform chromaticity diagram (a type of chromaticity diagram in which the distance between two points is closer to the psychological sense of color difference). To find X , Y , and Z , multiply the spectral energy of the light to be measured by the color matching functions (λ), (λ), and (λ), which are also called the spectral sensitivities of X , Y , and Z , for each wavelength, and add them up over all wavelengths. ... *Some of the terminology that refers to the "uniform chromaticity diagram" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…それらが定まればx=X/(X+Y+Z),y=Y/(X+Y+Z)で色度座標x,yを計算し,xy色度図にプロットすることができる。またそれらを変換してu′v′均等色度図(2点間の間隔を心理的な色差の感覚に近くなるようにした色度図の一種)上へのプロットも可能である。 X,Y,Zを求めるには,X,Y,Zの分光感度ともいうべき等色関数(λ),(λ),(λ)を,被測定光の分光エネルギーに波長ごとに掛けて,これを全波長にわたって足せばよい。… ※「均等色度図」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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