qualpal::colors::LCHab Class Reference

LCHab color space representation (CIE L*C*h) More...

#include <colors.h>

Public Member Functions
	LCHab ()
	Default constructor initializes LCHab to black (0,0,0)
	LCHab (const double l, const double c, const double h)
	Construct LCHab from component values.
	LCHab (const Lab &lab)
	Construct LCHab from Lab color.
	LCHab (const RGB &rgb)
	Construct LCHab from RGB color.
	LCHab (const HSL &hsl)
	Construct LCHab from HSL color.
	LCHab (const XYZ &xyz, const std::array< double, 3 > &white_point={ 0.95047, 1, 1.08883 })
	Construct LCHab from XYZ color.
bool	operator== (const LCHab &other) const
	equality operator for LCHab colors
bool	operator!= (const LCHab &other) const
	inequality operator for LCHab colors
double	l () const
	Get lightness [0,100].
double	c () const
	Get chroma [0,∞)
double	h () const
	Get hue in degrees [0,360)

Detailed Description

LCHab color space representation (CIE L*C*h)

LCHab color space representation (CIE L*C*h).

Cylindrical representation of Lab color space:

• L: Lightness [0, 100]
• C: Chroma [0, ∞)
• H: Hue in degrees [0, 360)

Useful for intuitive manipulation of color lightness, chroma, and hue. Provides conversion constructors for Lab, RGB, HSL, and XYZ. Most conversions use the D65 reference white point by default.

See also

Lab, RGB, HSL, XYZ for conversions.

Definition at line 574 of file colors.h.

Constructor & Destructor Documentation

LCHab() [1/5]

qualpal::colors::LCHab::LCHab	(	const double	l,
		const double	c,
		const double	h
	)

Construct LCHab from component values.

Parameters

l	Lightness [0,100]
c	Chroma [0,∞)
h	Hue in degrees [0,360)

LCHab() [2/5]

qualpal::colors::LCHab::LCHab

(

const Lab &

lab

)

Construct LCHab from Lab color.

Parameters

lab	Lab color to convert from

LCHab() [3/5]

qualpal::colors::LCHab::LCHab

(

const RGB &

rgb

)

Construct LCHab from RGB color.

Parameters

rgb	RGB color to convert from

LCHab() [4/5]

qualpal::colors::LCHab::LCHab

(

const HSL &

hsl

)

Construct LCHab from HSL color.

Parameters

hsl	HSL color to convert from

LCHab() [5/5]

qualpal::colors::LCHab::LCHab	(	const XYZ &	xyz,
		const std::array< double, 3 > &	white_point = { 0.95047, 1, 1.08883 }
	)

Construct LCHab from XYZ color.

Parameters

xyz	XYZ color to convert from
white_point	Reference white point (default: D65)

Member Function Documentation

c()

double qualpal::colors::LCHab::c ( ) const

inline

Get chroma [0,∞)

Definition at line 641 of file colors.h.

h()

double qualpal::colors::LCHab::h ( ) const

inline

Get hue in degrees [0,360)

Definition at line 643 of file colors.h.

l()

double qualpal::colors::LCHab::l ( ) const

inline

Get lightness [0,100].

Definition at line 639 of file colors.h.

operator!=()

bool qualpal::colors::LCHab::operator!= ( const LCHab &  other ) const

inline

inequality operator for LCHab colors

Parameters

other

Other LCHab color to compare with

Returns

true if LCHab colors are not equal, false otherwise

Definition at line 636 of file colors.h.

operator==()

bool qualpal::colors::LCHab::operator== ( const LCHab &  other ) const

inline

equality operator for LCHab colors

Parameters

other

Other LCHab color to compare with

Returns

true if both LCHab colors are equal, false otherwise

Definition at line 625 of file colors.h.

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The documentation for this class was generated from the following file:

• include/qualpal/colors.h