Modulecolour-2.3.6Haskell98

Data.Colour.CIE

Colour operations defined by the International Commission on Illumination (CIE).

2 types
14 values

Packagecolour-2.3.6
Exports16
LanguageHaskell98
LicenceMIT
SourceCIE.hs

datadata Colour a

This type represents the human preception of colour. The a parameter is a numeric type used internally for the representation.

The Monoid instance allows one to add colours, but beware that adding colours can take you out of gamut. Consider using blend whenever possible.

Instances7AffineSpace, ColourOps, Eq, Read, Show, Semigroup, …

AffineSpace ColourDefined in colour-2.3.6 · Data.Colour.Internal
ColourOps ColourDefined in colour-2.3.6 · Data.Colour.Internal
Eq a => Eq (Colour a)Defined in colour-2.3.6 · Data.Colour.Internal
(Fractional a, Read a) => Read (Colour a)Defined in colour-2.3.6 · Data.Colour · orphan
(Fractional a, Show a) => Show (Colour a)Defined in colour-2.3.6 · Data.Colour · orphan
Num a => Semigroup (Colour a)Defined in colour-2.3.6 · Data.Colour.Internal
Num a => Monoid (Colour a)Defined in colour-2.3.6 · Data.Colour.Internal

valuecieXYZ :: Fractional a => a -> a -> a -> Colour a

Construct a Colour from XYZ coordinates for the 2° standard (colourimetric) observer.

valuecieXYZView :: Fractional a => Colour a -> (a, a, a)

Returns the XYZ colour coordinates for the 2° standard (colourimetric) observer.

valueluminance :: Fractional a => Colour a -> a

Returns the Y colour coordinate (luminance) for the 2° standard (colourimetric) observer.

valuetoCIEXYZ :: Fractional a => Colour a -> (a, a, a)

Deprecated. toCIEXYZ has been renamed cieXYZView

datadata Chromaticity a

Instances4AffineSpace, Eq, Read, Show

AffineSpace ChromaticityDefined in colour-2.3.6 · Data.Colour.CIE · orphan
Eq a => Eq (Chromaticity a)Defined in colour-2.3.6 · Data.Colour.CIE.Chromaticity
(Fractional a, Read a) => Read (Chromaticity a)Defined in colour-2.3.6 · Data.Colour.CIE.Chromaticity
(Fractional a, Show a) => Show (Chromaticity a)Defined in colour-2.3.6 · Data.Colour.CIE.Chromaticity

valuemkChromaticity :: Fractional a => a -> a -> Chromaticity a

Constructs Chromaticity from the CIE little x, little y coordinates for the 2° standard (colourimetric) observer.

valuechromaCoords :: Fractional a => Chromaticity a -> (a, a, a)

Returns the CIE little x, little y, little z coordinates for the 2° standard (colourimetric) observer.

valuechromaX :: Fractional a => Chromaticity a -> a

Returns the CIE little x coordinate for the 2° standard (colourimetric) observer.

valuechromaY :: Fractional a => Chromaticity a -> a

Returns the CIE little y coordinate for the 2° standard (colourimetric) observer.

valuechromaZ :: Fractional a => Chromaticity a -> a

Returns the CIE little z coordinate for the 2° standard (colourimetric) observer.

valuechromaConvert :: (Fractional b, Real a) => Chromaticity a -> Chromaticity b

Change the type used to represent the chromaticity coordinates.

valuechromaColour

:: Fractional a
=> Chromaticity a
-> a
luminance
-> Colour a

Constructs a colour from the given Chromaticity and luminance.

valuelightness

:: (Ord a, Floating a)
=> Chromaticity a
White point
-> Colour a
-> a

Returns the lightness of a colour with respect to a given white point. Lightness is a perceptually uniform measure.

valuecieLABView

:: (Ord a, Floating a)
=> Chromaticity a
White point
-> Colour a
-> (a, a, a)

Returns the CIELAB coordinates of a colour, which is a perceptually uniform colour space. The first coordinate is lightness. If you don't know what white point to use, use d65.

valuecieLAB

:: (Ord a, Floating a)
=> Chromaticity a
White point
-> a
L* coordinate (lightness)
-> a
a* coordinate
-> a
b* coordinate
-> Colour a

Returns the colour for given CIELAB coordinates, which is a perceptually uniform colour space. If you don't know what white point to use, use d65.

Orphan instances

1 instance

AffineSpace Chromaticity