chromaticity diagram


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chromaticity diagram

[‚krō·mə′tis·əd·ē dī·ə‚gram]
(optics)
A triangular graph for specifying colors, whose ordinate is the y chromaticity coordinate and whose abscissa is the x chromaticity coordinate; the apexes of the triangle represent primary colors. Also known as chromatic diagram.
References in periodicals archive ?
According to the definition, we calculate the normalized chromaticity coordinate x, y, z in the equation below, which can be pointed in the chromaticity diagram.
Thresholds that define red-green (RG) and blue-yellow (BY) sensitivity, within the neutral isochromatic zone, are plotted as x, y chromaticity co-ordinates in the CIE chromaticity diagram (1931).
That's why the LRC recommends using two metrics: CRI, which measures how similar a light source renders colors compared to a reference illuminant, and the gamut area index (GAI), which evaluates the relative area enclosed by sample colors on a chromaticity diagram when rendered by the source.
AN ILLUMINANT'S POSITION ON THE CHROMATICITY DIAGRAM
Chromaticity diagrams (Figure 1) after exposure correction were close to chromaticity diagram of standard colour table in a blue field (for the blue the increased colour difference after the correction is result of too much reduction in brightness due to underexposure).
Then we calculated the distance differences of all the data on u-v chromaticity diagram.
In 1931, the Committee Internationale de l'Eclairage (CIE) agreed on a reference chromaticity diagram which is based on the matching characteristics of a standard observer (48,49) and theoretical primary colours which, when mixed in equal amounts, produce equal energy white.