Data.Colour.CIE
Description
Colour operations defined by the International Commission on Illumination (CIE).
- data Colour a
- cieXYZ :: Fractional a => a -> a -> a -> Colour a
- cieXYZView :: Fractional a => Colour a -> (a, a, a)
- luminance :: Fractional a => Colour a -> a
- toCIEXYZ :: Fractional a => Colour a -> (a, a, a)
- data Chromaticity a
- mkChromaticity :: Fractional a => a -> a -> Chromaticity a
- chromaCoords :: Fractional a => Chromaticity a -> (a, a, a)
- chromaX :: Fractional a => Chromaticity a -> a
- chromaY :: Fractional a => Chromaticity a -> a
- chromaZ :: Fractional a => Chromaticity a -> a
- chromaConvert :: (Fractional b, Real a) => Chromaticity a -> Chromaticity b
- chromaColour :: Fractional a => Chromaticity a -> a -> Colour a
- lightness :: (Ord a, Floating a) => Chromaticity a -> Colour a -> a
- cieLABView :: (Ord a, Floating a) => Chromaticity a -> Colour a -> (a, a, a)
- cieLAB :: (Ord a, Floating a) => Chromaticity a -> a -> a -> a -> Colour a
Documentation
cieXYZ :: Fractional a => a -> a -> a -> Colour aSource
Construct a Colour from XYZ coordinates for the 2° standard
(colourimetric) observer.
cieXYZView :: Fractional a => Colour a -> (a, a, a)Source
Returns the XYZ colour coordinates for the 2° standard (colourimetric) observer.
luminance :: Fractional a => Colour a -> aSource
Returns the Y colour coordinate (luminance) for the 2° standard (colourimetric) observer.
toCIEXYZ :: Fractional a => Colour a -> (a, a, a)Source
data Chromaticity a Source
Instances
| AffineSpace Chromaticity | |
| Eq a => Eq (Chromaticity a) | |
| (Fractional a, Read a) => Read (Chromaticity a) | |
| (Fractional a, Show a) => Show (Chromaticity a) |
mkChromaticity :: Fractional a => a -> a -> Chromaticity aSource
Constructs Chromaticity from the CIE little x, little y
coordinates for the 2° standard (colourimetric) observer.
chromaCoords :: Fractional a => Chromaticity a -> (a, a, a)Source
Returns the CIE little x, little y, little z coordinates for the 2° standard (colourimetric) observer.
chromaX :: Fractional a => Chromaticity a -> aSource
Returns the CIE little x coordinate for the 2° standard (colourimetric) observer.
chromaY :: Fractional a => Chromaticity a -> aSource
Returns the CIE little y coordinate for the 2° standard (colourimetric) observer.
chromaZ :: Fractional a => Chromaticity a -> aSource
Returns the CIE little z coordinate for the 2° standard (colourimetric) observer.
chromaConvert :: (Fractional b, Real a) => Chromaticity a -> Chromaticity bSource
Change the type used to represent the chromaticity coordinates.
Arguments
| :: Fractional a | |
| => Chromaticity a | |
| -> a | |
| -> Colour a |
Constructs a colour from the given Chromaticity and luminance.
Arguments
| :: (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.
Arguments
| :: (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
Data.Colour.CIE.Illuminant.d65.
Arguments
| :: (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
Data.Colour.CIE.Illuminant.d65.