Lab

A CIE L*a*b* color, parameterised for component type and white point.

Lab is a color space that describes all colors visible to the human eye and was created to serve as a device-independent model to be used as a reference. L* represents the lightness of the color; L* = 0 yields black and L* = 100 indicates diffuse white, specular white may be higher. a* represents the position between red/magenta and green; negative values indicate green while positive values indicate magenta. b* represents the position between yellow and blue; negative values indicate blue and positive values indicate yellow.

Lab is often found using default white point D50, but it is also common to use D65 when interacting with sRGB images.

@safe pure nothrow @nogc

struct Lab (

F = float

alias whitePoint_ = (WhitePoint!F.D50)

) if (

isFloatingPoint!F

) {

alias ComponentType = F;

@safe pure nothrow @nogc

enum whitePoint;

@safe pure nothrow @nogc

F L;

@safe pure nothrow @nogc

F a;

@safe pure nothrow @nogc

F b;

this(F L, F a, F b);

F perceptualDistance(Lab!G c);

Color opCast();

typeof(this) opUnary();

typeof(this) opBinary(typeof(this) rh);

typeof(this) opBinary(S rh);

typeof(this) opOpAssign(typeof(this) rh);

typeof(this) opOpAssign(S rh);

}

Constructors

this this(F L, F a, F b): Construct a color from L*a*b* values.

Members

Aliases

ComponentType alias ComponentType = F: Type of the color components.

Functions

opBinary typeof(this) opBinary(S rh): Binary operators.
opBinary typeof(this) opBinary(typeof(this) rh): Binary operators.
opCast Color opCast(): Cast to other color types.
opOpAssign typeof(this) opOpAssign(typeof(this) rh): Binary assignment operators.
opOpAssign typeof(this) opOpAssign(S rh): Binary assignment operators.
opUnary typeof(this) opUnary(): Unary operators.
perceptualDistance F perceptualDistance(Lab!G c): Returns the perceptual distance between the specifies colors.

Manifest constants

whitePoint enum whitePoint;: The color components that were specified.

Variables

L F L;: L* (lightness) component.
a F a;: a* component. Negative values indicate green, positive values indicate magenta.
b F b;: b* component. Negative values indicate blue, positive values indicate yellow.

The OpenD Programming Language

Lab

Constructors

Members

Aliases

Functions

Manifest constants

Variables

Meta

Source