Chromaticity: Difference between revisions

Revision as of 15:21, 9 December 2024

Chromaticity is a specification of the quality of a color regardless of its luminance. It is an objective measure of the hue and saturation of a color, which together define its chromaticity. Chromaticity is often represented in a two-dimensional space, where the coordinates are derived from the color's spectral properties.

Definition

Chromaticity is defined by two parameters:

Hue: This is the aspect of color which is described by terms such as red, yellow, green, blue, etc. It is the dominant wavelength of the color.
Saturation: This describes the intensity or purity of the color. A fully saturated color contains no white light.

Chromaticity is often represented in a chromaticity diagram, such as the CIE 1931 chromaticity diagram, which maps the chromaticity of colors in a two-dimensional space.

Chromaticity Diagrams

Chromaticity diagrams are graphical representations of the chromaticity of colors. The most well-known chromaticity diagram is the CIE 1931 chromaticity diagram, which uses the x and y coordinates to represent chromaticity.

CIE 1931 Chromaticity Diagram

The CIE 1931 chromaticity diagram is based on the CIE 1931 color space, which was the first mathematically defined color space. In this diagram, the chromaticity of a color is represented by its x and y coordinates, which are derived from the color's tristimulus values (X, Y, Z).

The diagram is a horseshoe-shaped plot, with the spectral colors (colors of a single wavelength) forming the curved boundary. The line connecting the ends of the horseshoe represents the purples, which are non-spectral colors.

Applications

Chromaticity is used in various fields, including:

Colorimetry: The science of measuring colors and assigning them numerical values.
Display technology: Ensuring accurate color reproduction in devices such as monitors and televisions.
Lighting: Designing lighting systems with specific color characteristics.

Mathematical Representation

Chromaticity can be mathematically represented using different color spaces, such as the CIE 1931 color space, CIE 1976 (L*, a*, b*), and others. Each color space provides a different method for calculating chromaticity coordinates.

Also see

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-[[file:Chromaticity_Diagram_RGB.svg|thumb|Chromaticity Diagram RGB]] [[file:Chromaticity_Diagram_RGB.svg|thumb|Chromaticity Diagram RGB|left]] [[file:PlanckianLocus.png|thumb|PlanckianLocus]] [[file:3D_Chromaticity_Diagram_WideGamutRGB.svg|thumb|3D Chromaticity Diagram WideGamutRGB|left]] [[file:CIE_1976_UCS.png|thumb|CIE 1976 UCS]] '''Chromaticity''' is an objective specification of the quality of a color regardless of its luminance. Chromaticity is a two-dimensional representation of color, which is defined by its hue and saturation. It is often used in various fields such as [[color science]], [[digital imaging]], and [[color printing]].
+[[File:Chromaticity Diagram RGB.svg|thumb]] [[File:Chromaticity Diagram RGB.svg|thumb]] [[File:PlanckianLocus.png|thumb]] [[File:3D Chromaticity Diagram WideGamutRGB.svg|thumb]] {{DISPLAYTITLE:Chromaticity}}
-== Definition ==
+'''Chromaticity''' is a specification of the quality of a color regardless of its luminance. It is an objective measure of the hue and saturation of a color, which together define its chromaticity. Chromaticity is often represented in a two-dimensional space, where the coordinates are derived from the color's spectral properties.
-Chromaticity is typically represented in a chromaticity diagram, which is a graphical representation of colors. The most common chromaticity diagram is the [[CIE 1931 color space|CIE 1931 chromaticity diagram]], which was developed by the [[International Commission on Illumination]] (CIE). In this diagram, colors are represented by their [[x, y chromaticity coordinates]].
-== Chromaticity Coordinates ==
+==Definition==
-Chromaticity coordinates are a set of values that define a color's hue and saturation. These coordinates are derived from the [[tristimulus values]] of a color, which are the amounts of three primary colors needed to match the color. The most commonly used chromaticity coordinates are the CIE 1931 x, y coordinates.
+Chromaticity is defined by two parameters:
-== Chromaticity Diagram ==
+* '''Hue''': This is the aspect of color which is described by terms such as red, yellow, green, blue, etc. It is the dominant wavelength of the color.
-The chromaticity diagram is a two-dimensional plot that shows the chromaticity coordinates of colors. The diagram includes a horseshoe-shaped curve known as the [[spectral locus]], which represents the chromaticities of pure spectral colors. The area inside the spectral locus represents the chromaticities of all possible colors.
+* '''Saturation''': This describes the intensity or purity of the color. A fully saturated color contains no white light.
-== Applications ==
+Chromaticity is often represented in a chromaticity diagram, such as the [[CIE 1931 color space|CIE 1931 chromaticity diagram]], which maps the chromaticity of colors in a two-dimensional space.
-Chromaticity is used in various applications, including:
-* [[Color calibration]]: Ensuring that colors are accurately represented on different devices.
+==Chromaticity Diagrams==
-* [[Color matching]]: Matching colors in different materials or lighting conditions.
+Chromaticity diagrams are graphical representations of the chromaticity of colors. The most well-known chromaticity diagram is the [[CIE 1931 color space|CIE 1931 chromaticity diagram]], which uses the x and y coordinates to represent chromaticity.
-* [[Colorimetry]]: The science of measuring and describing color.
-== Related Concepts ==
+===CIE 1931 Chromaticity Diagram===
+The CIE 1931 chromaticity diagram is based on the [[CIE 1931 color space]], which was the first mathematically defined color space. In this diagram, the chromaticity of a color is represented by its x and y coordinates, which are derived from the color's tristimulus values (X, Y, Z).
+The diagram is a horseshoe-shaped plot, with the spectral colors (colors of a single wavelength) forming the curved boundary. The line connecting the ends of the horseshoe represents the purples, which are non-spectral colors.
+==Applications==
+Chromaticity is used in various fields, including:
+* '''Colorimetry''': The science of measuring colors and assigning them numerical values.
+* '''Display technology''': Ensuring accurate color reproduction in devices such as monitors and televisions.
+* '''Lighting''': Designing lighting systems with specific color characteristics.
+==Mathematical Representation==
+Chromaticity can be mathematically represented using different color spaces, such as the [[CIE 1931 color space]], [[CIE 1976 (L*, a*, b*) color space|CIE 1976 (L*, a*, b*)]], and others. Each color space provides a different method for calculating chromaticity coordinates.
+==Also see==
 * [[Color space]]
-* [[Color temperature]]
-* [[Color vision]]
-* [[Metamerism]]
-== See Also ==
 * [[CIE 1931 color space]]
-* [[Color science]]
 * [[Colorimetry]]
-* [[Tristimulus values]]
+* [[Hue]]
-* [[Spectral locus]]
+* [[Saturation (color theory)]]
-== References ==
-{{Reflist}}
-== External Links ==
+{{Color}}
-{{Commons category|Chromaticity}}
-[[Category:Color]]
-[[Category:Color space]]
 [[Category:Color science]]
-[[Category:Color vision]]
+[[Category:Color theory]]
-{{color-stub}}