Represents a color space with chromaticity coordinates and transfer functions. More...

#include <colorspace.h>

Classes
struct	Data
	Static data describing a color space. More...

Public Types
enum	ID { Invalid = 0 , Rec709 , LinearRec709 , Rec601_PAL , LinearRec601_PAL , Rec601_NTSC , LinearRec601_NTSC }
	Identifies a known color space. More...

typedef double(*	TransformFunc) (double)
	Function pointer type for electro-optical transfer functions.

typedef std::array< CIEPoint, 4 >	Params
	CIE chromaticity coordinates: red, green, blue primaries and white point.

Public Member Functions
	ColorSpace (ID id=Invalid)
	Constructs a ColorSpace from the given ID, defaulting to Invalid.

const ID	id () const
	Returns the color space ID.

ColorSpace	inverseColorSpace ()
	Returns the inverse color space.

const String	name () const
	Returns the color space name.

const String	desc () const
	Returns the color space description.

const CIEPoint &	red () const
	Returns the red chromaticity coordinate.

const CIEPoint &	green () const
	Returns the green chromaticity coordinate.

const CIEPoint &	blue () const
	Returns the blue chromaticity coordinate.

const CIEPoint &	whitePoint () const
	Returns the white point chromaticity coordinate.

double	transferFunc (double input) const
	Applies the forward transfer function (OETF) to the given value.

double	invtTransferFunc (double input) const
	Applies the inverse transfer function (EOTF) to the given value.

Detailed Description

Represents a color space with chromaticity coordinates and transfer functions.

Wraps a static lookup table of known color spaces (e.g. Rec. 709, Rec. 601) with their CIE chromaticity primaries, white point, and electro-optical / opto-electronic transfer functions.

Member Enumeration Documentation

◆ ID

enum ColorSpace::ID

Identifies a known color space.

Enumerator
Invalid	Invalid or unset color space.
Rec709	ITU-R BT.709 (gamma-corrected).
LinearRec709	ITU-R BT.709 (linear / scene-referred).
Rec601_PAL	ITU-R BT.601 PAL (gamma-corrected).
LinearRec601_PAL	ITU-R BT.601 PAL (linear).
Rec601_NTSC	ITU-R BT.601 NTSC (gamma-corrected).
LinearRec601_NTSC	ITU-R BT.601 NTSC (linear).

Member Function Documentation

◆ invtTransferFunc()

double ColorSpace::invtTransferFunc ( double input ) const

inline

Applies the inverse transfer function (EOTF) to the given value.

Parameters

input The gamma-corrected value to linearize.

Returns: The linear-light value.

◆ transferFunc()

double ColorSpace::transferFunc ( double input ) const

inline

Applies the forward transfer function (OETF) to the given value.

Parameters

input The linear-light value to transform.

Returns: The gamma-corrected value.

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

include/promeki/proav/colorspace.h

Classes