chromaticity

The figure on the right shows the related chromaticity diagram.

Chromaticity defines all the qualities of color except its brightness.

These expressions, he noted, depended only on the chromaticity of the sample.

However, the concept of color can be divided into two parts: brightness and chromaticity.

In other words, the chromaticity of white and grey are the same while their brightness differs.

Hue: the color's direction from white, for example in a color wheel or chromaticity diagram.

Chromaticity, the quality of a color as determined by its "purity" and dominant wavelength.

In chromaticity scales, lightness is factored out, leaving two dimensions.

A chromaticity is a color projected into a two-dimensional space that ignores brightness.

Adams suggested a relatively simple uniform chromaticity scale in his 1942 paper:

In chromatic value color spaces, the chromaticity components are and .

Taking a cross-section of this cone yields a 2D chromaticity space.

Note that the chromaticity diagram is a tool to specify how the human eye will experience light with a given spectrum.

Two parts of a visual field can be of equal luminance, but their color (chromaticity) is different.

Unlike a chromaticity diagram, the Kelvin scale reduces the light source's color into one dimension.

Accordingly, he called their plot a "constant-brightness chromaticity diagram".

Two lights with the same spectral power distribution, but different luminance, will have identical chromaticity coordinates.

The contour of the ellipse therefore represents the just noticeable differences of chromaticity.

If the profile is normalized, then the white point can equivalently be expressed as a pair of chromaticity coordinates.

For example, the chromaticity coordinates x and y are used in the xyY space, etc.

It decreases its lightness while nearly conserving its chromaticity.

Free Windows utility to generate chromaticity diagrams.

The Abney Effect can be illustrated on chromaticity diagrams as well.

MacAdam's results confirmed earlier suspicions that color difference could be measured using a metric in a chromaticity space.

In chromaticity space, the gamut is a plane convex polygon with corners at the primaries.