Color calculations

Fast hardcoded color conversions. More...

Collaboration diagram for Color calculations:

Data Structures
struct	oyVEC3
	Vector of 3 doubles. More...
struct	oyMAT3
	3x3 Matrix More...
struct	oyCIEXYZ
	vector of 3 doubles More...
struct	oyCIExyY
	CIE*xy. More...
struct	oyCIExyYTriple
	CIE*xy triple. More...

Functions
void	oyLab2XYZ (const double *CIELab, double *XYZ)
	CIE Lab to ICC XYZ. More...
void	oyXYZ2Lab (const double *XYZ, double *lab)
	ICC XYZ to CIE * Lab. More...
void	oyIcc2CIELab (const double i[], double o[], void *data OY_UNUSED)
	ICC Lab to CIE * Lab encoding. More...
void	oyCIE2IccLab (const double i[], double o[], void *data OY_UNUSED)
	CIE * Lab to ICC Lab encoding. More...
void	oyIcc2CIELabFloat (const float i[], float o[], void *data OY_UNUSED)
	ICC Lab to CIE * Lab encoding. More...
void	oyCIE2IccLabFloat (const float i[], float o[], void *data OY_UNUSED)
	CIE * Lab to ICC Lab encoding. More...
void	oyCIEabsXYZ2ICCrelXYZ (const double *CIEXYZ, double *ICCXYZ, const double *XYZmin, const double *XYZmax, const double *XYZwhite)
	CIE absolute colorimetric to ICC relative colorimetric. More...
void	oyICCXYZrel2CIEabsXYZ (const double *ICCXYZ, double *CIEXYZ, const double *XYZmin, const double *XYZmax, const double *XYZwhite)
	ICC relative colorimetric to CIE absolute colorimetric. More...
double	oyEstimateTemperature (double CIEa, double CIEb, double *dist)
	guess black body radiation locus from CIE*ab More...
int	oyAdaptationMatrix (oyMAT3 *r, const oyMAT3 *ConeMatrix, const oyCIEXYZ *FromIll, const oyCIEXYZ *ToIll)
int	oyMAT3inverse (const oyMAT3 *a, oyMAT3 *b)
	Inverse of a matrix b = a^(-1) More...
void	oyVEC3init (oyVEC3 *r, double x, double y, double z)
	Initiate a vector. More...
void	oyMAT3per (oyMAT3 *r, const oyMAT3 *a, const oyMAT3 *b)
	Multiply two matrices. More...
void	oyMAT3eval (oyVEC3 *r, const oyMAT3 *a, const oyVEC3 *v)
	Evaluate a vector across a matrix. More...
int	oyMAT3toCIExyYTriple (const oyMAT3 *a, oyCIExyYTriple *triple)

Detailed Description

Fast hardcoded color conversions.

Function Documentation

oyAdaptationMatrix()

int oyAdaptationMatrix	(	oyMAT3 *	r,
		const oyMAT3 *	ConeMatrix,
		const oyCIEXYZ *	FromIll,
		const oyCIEXYZ *	ToIll
	)

Returns the final chrmatic adaptation from illuminant FromIll to Illuminant ToIll. The cone matrix can be specified in ConeMatrix. If NULL, Bradford is assumed

oyCIE2IccLab()

void oyCIE2IccLab	(	const double	i[],
		double	o[],
		void *data	OY_UNUSED
	)

CIE * Lab to ICC Lab encoding.

position independent function for in place conversions

oyCIE2IccLabFloat()

void oyCIE2IccLabFloat	(	const float	i[],
		float	o[],
		void *data	OY_UNUSED
	)

CIE * Lab to ICC Lab encoding.

position independent function for in place conversions

oyCIEabsXYZ2ICCrelXYZ()

void oyCIEabsXYZ2ICCrelXYZ	(	const double *	CIEXYZ,
		double *	ICCXYZ,
		const double *	XYZmin,
		const double *	XYZmax,
		const double *	XYZwhite
	)

CIE absolute colorimetric to ICC relative colorimetric.

Function oyCIEabsXYZ2ICCrelXYZ

Parameters

[in]	CIEXYZ	CIE absolute colorimetric input
[out]	ICCXYZ	ICC relative colorimetric output
[in]	XYZmin	CIE absolute black point
[in]	XYZmax	CIE absolute media white
[in]	XYZwhite	illuminant white

Since

Oyranos: version 0.1.8

Date

2008/01/20 (API 0.1.8)

oyEstimateTemperature()

double oyEstimateTemperature	(	double	CIEa,
		double	CIEb,
		double *	dist
	)

guess black body radiation locus from CIE*ab

oyIcc2CIELab()

void oyIcc2CIELab	(	const double	i[],
		double	o[],
		void *data	OY_UNUSED
	)

ICC Lab to CIE * Lab encoding.

position independent function for in place conversions

oyIcc2CIELabFloat()

void oyIcc2CIELabFloat	(	const float	i[],
		float	o[],
		void *data	OY_UNUSED
	)

ICC Lab to CIE * Lab encoding.

position independent function for in place conversions

oyICCXYZrel2CIEabsXYZ()

void oyICCXYZrel2CIEabsXYZ	(	const double *	ICCXYZ,
		double *	CIEXYZ,
		const double *	XYZmin,
		const double *	XYZmax,
		const double *	XYZwhite
	)

ICC relative colorimetric to CIE absolute colorimetric.

Function oyICCXYZrel2CIEabsXYZ

Parameters

[in]	ICCXYZ	ICC relative colorimetric input
[out]	CIEXYZ	CIE absolute colorimetric output
[in]	XYZmin	CIE absolute black point
[in]	XYZmax	CIE absolute media white
[in]	XYZwhite	illuminant white

Since

Oyranos: version 0.1.8

Date

2008/01/20 (API 0.1.8)

oyLab2XYZ()

void oyLab2XYZ	(	const double *	CIELab,
		double *	XYZ
	)

CIE Lab to ICC XYZ.

oyMAT3eval()

void oyMAT3eval	(	oyVEC3 *	r,
		const oyMAT3 *	a,
		const oyVEC3 *	v
	)

Evaluate a vector across a matrix.

References oyVEC3::n.

oyMAT3inverse()

int oyMAT3inverse	(	const oyMAT3 *	a,
		oyMAT3 *	b
	)

Inverse of a matrix b = a^(-1)

oyMAT3per()

void oyMAT3per	(	oyMAT3 *	r,
		const oyMAT3 *	a,
		const oyMAT3 *	b
	)

Multiply two matrices.

References oyVEC3init().

oyMAT3toCIExyYTriple()

int oyMAT3toCIExyYTriple	(	const oyMAT3 *	a,
		oyCIExyYTriple *	triple
	)

convert a matrix to CIE * xy triple

References oyVEC3::n, oyMAT3::v, oyCIExyYTriple::v, and oyCIExyY::xy.

oyVEC3init()

void oyVEC3init	(	oyVEC3 *	r,
		double	x,
		double	y,
		double	z
	)

Initiate a vector.

Referenced by oyMAT3per().

oyXYZ2Lab()

void oyXYZ2Lab	(	const double *	XYZ,
		double *	lab
	)

ICC XYZ to CIE * Lab.