[−][src]Module prisma::white_point
Defines the named standard illuminants for both 2 and 10 degree observers
White point is used in many situations when dealing with color, as color perception changes depending on the lighting of the object being viewed. A white point is needed to define a color space (and thus go to XYZ) as well as to go from XYZ to Lab and Luv.
CIE defines two "standard observers", which are used to construct the XYZ space. The 2 degree observer is the most often used, and corresponds to the perception in the center 2 degree field of view of the eye. A later 10 degree observer was created to model perception in a 10 degree field of view excluding the inner 2 degrees. It is recommended for use when a larger field of view needs to be considered. The 2 degree observer white points are re-exported. Note that the 2 and 10 degree standard observers use fundamentally different color-matching functions, which means that they yield different XYZ spaces. It is not valid (without spectrographic data) to convert between a 2 degree standard observer XYZ space and a 10 degree standard observer XYZ space.
The standard illuminants are slightly different between the two, so prisma provides two modules
containing them deg_2 and deg_10. If you don't know which to use, use deg_2.
Re-exports
pub use self::deg_2::*; |
Modules
| deg_2 | The named standard illuminants used with the 2 degree standard observer |
| deg_10 | The named standard illuminants used with the 10 degree standard observer |
Traits
| UnitWhitePoint | A |
| WhitePoint | A named standard illuminant, expressed as XYZ coordinates |