ColourCurve Class Reference

The ColourCurve provides an 8-bit lookup table to manipulate brightness, contrast and gamma correction per channel. More...

#include <foleys_ColourLookuptables.h>

Public Member Functions
	ColourCurve ()=default
void	calculateColourMap (double newBrightness, double newContrast, double newGamma)
	calculateColourMap will set up the lookup table.
bool	isLinear () const
	The method isLinear returns true, if the curve is the identity function.
void	applyLUT (juce::Image &image, int component)
	Applies a ColourCurve to a channel of an image.
const uint8_t *	getLookupTable () const
	This methods gives you reading access to the lookup table.

Static Public Member Functions
static void	applyLUTs (juce::Image &image, const ColourCurve &red, const ColourCurve &green, const ColourCurve &blue)
	Applies a set of ColourCurves to an image.
static void	applyLUTs (juce::Image &image, const ColourCurve &red, const ColourCurve &green, const ColourCurve &blue, const ColourCurve &alpha)
	Applies a set of ColourCurves to an image.

Detailed Description

The ColourCurve provides an 8-bit lookup table to manipulate brightness, contrast and gamma correction per channel.

Constructor & Destructor Documentation

ColourCurve()

ColourCurve ( )

default

Member Function Documentation

calculateColourMap()

void calculateColourMap	(	double	newBrightness,
		double	newContrast,
		double	newGamma
	)

calculateColourMap will set up the lookup table.

Parameters

newBrightness	will add or subtract a normalised value (-1..1)
newContrast	multiplies the slope of the curve (-1..1)
newGamma	the gamma value for the curve (0.1..4.0)

References ColourCurve::isLinear().

Referenced by ColourCurveVideoProcessor::processFrame().

isLinear()

bool isLinear

(

)

const

The method isLinear returns true, if the curve is the identity function.

Referenced by ColourCurve::calculateColourMap(), and ColourCurveVideoProcessor::processFrame().

applyLUT()

void applyLUT	(	juce::Image &	image,
		int	component
	)

Applies a ColourCurve to a channel of an image.

Parameters

image	the image to apply the ColourCurve
component	is the index of the channel in the packed pixel

Referenced by ColourCurveVideoProcessor::processFrame().

applyLUTs() [1/2]

static void applyLUTs ( juce::Image &  image, const ColourCurve &  red, const ColourCurve &  green, const ColourCurve &  blue  )

static

Applies a set of ColourCurves to an image.

This method assumes BGR or BGRA format.

Parameters

image	the image to apply the ColourCurve
red	is the ColourCurve for the red channel
green	is the ColourCurve for the green channel
blue	is the ColourCurve for the blue channel

References ColourCurve::getLookupTable().

Referenced by ColourCurveVideoProcessor::processFrame().

applyLUTs() [2/2]

static void applyLUTs ( juce::Image &  image, const ColourCurve &  red, const ColourCurve &  green, const ColourCurve &  blue, const ColourCurve &  alpha  )

static

Applies a set of ColourCurves to an image.

This method assumes BGRA format.

Parameters

image	the image to apply the ColourCurve
red	is the ColourCurve for the red channel
green	is the ColourCurve for the green channel
blue	is the ColourCurve for the blue channel
alpha	is the ColourCurve for the alpha channel

References ColourCurve::getLookupTable().

getLookupTable()

const uint8_t * getLookupTable

(

)

const

This methods gives you reading access to the lookup table.

Referenced by ColourCurve::applyLUTs(), and ColourCurve::applyLUTs().

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

• foleys_ColourLookuptables.h