at.mug.iqm.commons.util

Class ColorConverter

java.lang.Object

at.mug.iqm.commons.util.ColorConverter

public final class ColorConverter
extends Object

This class consists of static methods for color space conversions for pixel values. Take care of input and/or output range [0,..,1] or [0,..,255] or [0,..,360] or [0,..,100].

Author:

Helmut Ahammer

Field Summary

Fields

Modifier and Type	Field and Description
private static double	c4
private static double	uuRef
private static double	vvRef
private static double	Xref
private static double	Yref
private static double	Zref

Constructor Summary

Constructors

Constructor and Description
ColorConverter()

Method Summary

Modifier and Type	Method and Description
static float[]	CIELABtoRGB(float l, float a, float b) CIELAB to RGB
static Raster	CIELABtoRGB(Raster raster) CIELAB to RGB
static float[]	CIELUVtoRGB(float l, float u, float v) CIELUV to RGB
static Raster	CIELUVtoRGB(Raster raster) CIELUV to RGB
static float[]	CIEXYZtoRGB(float x, float y, float z) CIEXYZ to RGB
static Raster	CIEXYZtoRGB(Raster raster) CIEXYZ to RGB
private static double	f1(double t) These are helper routines for CIELAB and CIELUV Parts are from: Wilhelm BURGER Mark J.
private static double	f2(double t)
static float[]	HLStoRGB(float h, float l, float s) HLS to RGB tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J.
static Raster	HLStoRGB(Raster raster) HLS to RGB
static float[]	HSVtoRGB(float h, float s, float v) HSV to RGB tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J.
static Raster	HSVtoRGB(Raster raster) HSV to RGB
static float[]	rgb2hmmd(float r, float g, float b) RGB to HMMD not yet tested
static float[]	rgb2hsb(float r, float g, float b) RGB to HSB tested input and output [0,..,255];
static float[]	rgb2hsl(float r, float g, float b)
static float[]	rgb2hsv(float r, float g, float b)
static float[]	rgb2lab(float R, float G, float B)
static float[]	rgb2luv(float R, float G, float B)
static float[]	rgb2xyY(float R, float G, float B)
static float[]	rgb2xyz(float R, float G, float B)
static float[]	rgb2ycbcr(float r, float g, float b)
static float[]	rgb2yuv(float r, float g, float b)
static float[]	RGBtoCIELAB(float r, float g, float b) RGB to CIELAB
static Raster	RGBtoCIELAB(Raster raster) RGB to CIELAB
static float[]	RGBtoCIELUV(float r, float g, float b) RGB to CIELUV
static Raster	RGBtoCIELUV(Raster raster) RGB to CIELUV
static float[]	RGBtoCIEXYZ(float r, float g, float b) RGB to CIEXYZ
static Raster	RGBtoCIEXYZ(Raster raster) RGB to CIEXYZ
static float[]	RGBtoHLS(float r, float g, float b) RGB to HLS tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J.
static Raster	RGBtoHLS(Raster raster) RGB to HLS
static Raster	RGBtoHSV(Raster raster) RGB to HSB

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

Xref

private static final double Xref

See Also:

Constant Field Values

Yref

private static final double Yref

See Also:

Constant Field Values

Zref

private static final double Zref

See Also:

Constant Field Values

c4

private static final double c4

uuRef

private static final double uuRef

See Also:

Constant Field Values

vvRef

private static final double vvRef

See Also:

Constant Field Values

Constructor Detail

ColorConverter

public ColorConverter()

Method Detail

rgb2hsb

public static float[] rgb2hsb(float r,
                              float g,
                              float b)

RGB to HSB tested input and output [0,..,255];

Parameters:

r -

g -

b -

Returns:

float[] one pixel HSV values;

RGBtoHSV

public static Raster RGBtoHSV(Raster raster)

RGB to HSB

Parameters:

raster - 3bands RGB

Returns:

raster 3bands HSV

RGBtoHLS

public static float[] RGBtoHLS(float r,
                               float g,
                               float b)

RGB to HLS tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java

Parameters:

r -

g -

b -

Returns:

float[] one pixel HLS values;

RGBtoHLS

public static Raster RGBtoHLS(Raster raster)

RGB to HLS

Parameters:

raster - 3bands RGB

Returns:

raster 3bands HLS

HLStoRGB

public static float[] HLStoRGB(float h,
                               float l,
                               float s)

HLS to RGB tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java

Parameters:

h -

l -

s -

Returns:

float[] one pixel RGB values;

HLStoRGB

public static Raster HLStoRGB(Raster raster)

HLS to RGB

Parameters:

raster - 3bands HLS

Returns:

raster 3bands RGB

HSVtoRGB

public static float[] HSVtoRGB(float h,
                               float s,
                               float v)

HSV to RGB tested OK 5.1.2010 input and output [0,..,255] This is from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java

Parameters:

h -

s -

v -

Returns:

float[] one pixel RGB values;

HSVtoRGB

public static Raster HSVtoRGB(Raster raster)

HSV to RGB

Parameters:

raster - 3bands HSV

Returns:

raster 3bands RGB

RGBtoCIEXYZ

public static float[] RGBtoCIEXYZ(float r,
                                  float g,
                                  float b)

RGB to CIEXYZ

Parameters:

r -

g -

b -

Returns:

float[] one pixel CIEXYZ values; input and output [0,..,255] tested 8.1.2010

RGBtoCIEXYZ

public static Raster RGBtoCIEXYZ(Raster raster)

RGB to CIEXYZ

Parameters:

raster - 3bands RGB

Returns:

raster 3bands CIEXYZ input and output [0,..,255]

CIEXYZtoRGB

public static float[] CIEXYZtoRGB(float x,
                                  float y,
                                  float z)

CIEXYZ to RGB

Parameters:

x -

y -

z -

Returns:

float[] one pixel RGB values; input and output [0,..,255] tested 8.1.2010

CIEXYZtoRGB

public static Raster CIEXYZtoRGB(Raster raster)

CIEXYZ to RGB

Parameters:

raster - 3bands CIEXYZ

Returns:

raster 3bands RGB

f1

private static double f1(double t)

These are helper routines for CIELAB and CIELUV Parts are from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java

f2

private static double f2(double t)

RGBtoCIELAB

public static float[] RGBtoCIELAB(float r,
                                  float g,
                                  float b)

RGB to CIELAB

Parameters:

r -

g -

b -

Returns:

float[] one pixel CIELAB values; This is from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java not yet tested

RGBtoCIELAB

public static Raster RGBtoCIELAB(Raster raster)

RGB to CIELAB

Parameters:

raster - 3bands RGB

Returns:

raster 3bands CIELAB

CIELABtoRGB

public static float[] CIELABtoRGB(float l,
                                  float a,
                                  float b)

CIELAB to RGB

Parameters:

l -

a -

b -

Returns:

float[] one pixel RGB values; input and output [0,..,255] This is from: Wilhelm BURGER Mark J. BURGE, Digital Image Processing, An Algorithmic Introduction using Java not yet tested

CIELABtoRGB

public static Raster CIELABtoRGB(Raster raster)

CIELAB to RGB

Parameters:

raster - 3bands CIELAB

Returns:

raster 3bands RGB

RGBtoCIELUV

public static float[] RGBtoCIELUV(float r,
                                  float g,
                                  float b)

RGB to CIELUV

Parameters:

r -

g -

b -

Returns:

float[] one pixel CIELUV values; not yet tested

RGBtoCIELUV

public static Raster RGBtoCIELUV(Raster raster)

RGB to CIELUV

Parameters:

raster - 3bands RGB

Returns:

raster 3bands CIELUV

CIELUVtoRGB

public static float[] CIELUVtoRGB(float l,
                                  float u,
                                  float v)

CIELUV to RGB

Parameters:

l -

u -

v -

Returns:

float[] one pixel RGB values; input and output [0,..,255] not yet tested

CIELUVtoRGB

public static Raster CIELUVtoRGB(Raster raster)

CIELUV to RGB

Parameters:

raster - 3bands CIELUV

Returns:

raster 3bands RGB

rgb2hsl

public static float[] rgb2hsl(float r,
                              float g,
                              float b)

rgb2hsv

public static float[] rgb2hsv(float r,
                              float g,
                              float b)

rgb2xyY

public static float[] rgb2xyY(float R,
                              float G,
                              float B)

rgb2xyz

public static float[] rgb2xyz(float R,
                              float G,
                              float B)

rgb2lab

public static float[] rgb2lab(float R,
                              float G,
                              float B)

rgb2luv

public static float[] rgb2luv(float R,
                              float G,
                              float B)

rgb2ycbcr

public static float[] rgb2ycbcr(float r,
                                float g,
                                float b)

rgb2yuv

public static float[] rgb2yuv(float r,
                              float g,
                              float b)

rgb2hmmd

public static float[] rgb2hmmd(float r,
                               float g,
                               float b)

RGB to HMMD not yet tested

Parameters:

r -

g -

b -

Returns:

float[] HMMD values;