ColorSpaceConverter (ImageJ API)

java.lang.Object
- ij.process.ColorSpaceConverter

```
public class ColorSpaceConverter
extends Object
```
ColorSpaceConverter

Author:

dvs, hlp Created Jan 15, 2004 Version 3 posted on ImageJ Mar 12, 2006 by Duane Schwartzwald vonschwartzwalder at mac.com Version 4 created Feb. 27, 2007 by Harry Parker, harrylparker at yahoo dot com, corrects RGB to XYZ (and LAB) conversion.

Field Summary

Fields
Modifier and Type	Field	Description
`double[]`	`chromaD50`	reference white in xyY coordinates
`double[]`	`chromaD55`
`double[]`	`chromaD65`
`double[]`	`chromaD75`
`double[]`	`chromaWhitePoint`
`double[]`	`D50`	reference white in XYZ coordinates
`double[]`	`D55`
`double[]`	`D65`
`double[]`	`D75`
`double[][]`	`M`	sRGB to XYZ conversion matrix
`double[][]`	`Mi`	XYZ to sRGB conversion matrix
`double[]`	`whitePoint`

Constructor Summary

Constructors
Constructor	Description
`ColorSpaceConverter()`	Default constructor; uses D65 for the white point
`ColorSpaceConverter(String white)`	Constructor for setting a non-default white point

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int[]`	`HSBtoRGB(double[] HSB)`
`int[]`	`HSBtoRGB(double H, double S, double B)`
`ImagePlus`	`LabToRGB(ImagePlus img)`	Converts a Lab stack into an RGB image.
`int[]`	`LABtoRGB(double[] Lab)`
`int[]`	`LABtoRGB(double L, double a, double b)`	Convert LAB to RGB.
`double[]`	`LABtoXYZ(double[] Lab)`	Convert LAB to XYZ.
`double[]`	`LABtoXYZ(double L, double a, double b)`	Convert LAB to XYZ.
`double[]`	`RGBtoHSB(int[] RGB)`
`double[]`	`RGBtoHSB(int R, int G, int B)`
`double[]`	`RGBtoLAB(int rgb)`
`double[]`	`RGBtoLAB(int[] RGB)`
`ImagePlus`	`RGBToLab(ImagePlus img)`	Converts an RGB image into a Lab stack.
`double[]`	`RGBtoXYZ(int[] RGB)`	Convert RGB to XYZ
`double[]`	`RGBtoXYZ(int R, int G, int B)`	Convert RGB to XYZ
`double[]`	`xyYtoXYZ(double[] xyY)`
`double[]`	`xyYtoXYZ(double x, double y, double Y)`
`double[]`	`XYZtoLAB(double[] XYZ)`	Convert XYZ to LAB.
`double[]`	`XYZtoLAB(double X, double Y, double Z)`	Convert XYZ to LAB.
`int[]`	`XYZtoRGB(double[] XYZ)`	Convert XYZ to RGB
`int[]`	`XYZtoRGB(double X, double Y, double Z)`	Convert XYZ to RGB.
`double[]`	`XYZtoxyY(double[] XYZ)`
`double[]`	`XYZtoxyY(double X, double Y, double Z)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

D50
```
public double[] D50
```
reference white in XYZ coordinates

D55
```
public double[] D55
```

D65
```
public double[] D65
```

D75
```
public double[] D75
```

whitePoint
```
public double[] whitePoint
```

chromaD50
```
public double[] chromaD50
```
reference white in xyY coordinates

chromaD55
```
public double[] chromaD55
```

chromaD65
```
public double[] chromaD65
```

chromaD75
```
public double[] chromaD75
```

chromaWhitePoint
```
public double[] chromaWhitePoint
```

M
```
public double[][] M
```
sRGB to XYZ conversion matrix

Mi
```
public double[][] Mi
```
XYZ to sRGB conversion matrix

Constructor Detail
- ColorSpaceConverter
```
public ColorSpaceConverter()
```
  Default constructor; uses D65 for the white point
- ColorSpaceConverter
```
public ColorSpaceConverter(String white)
```
  Constructor for setting a non-default white point
  
  Parameters:
  
  white - "d50", "d55", "d65" or "d75"

Method Detail

HSBtoRGB

public int[] HSBtoRGB(double H,
                      double S,
                      double B)

Parameters:: H - Hue angle/360 (0..1); S - Saturation (0..1); B - Value (0..1)
Returns:: RGB values

HSBtoRGB

public int[] HSBtoRGB(double[] HSB)

LABtoRGB

public int[] LABtoRGB(double L,
                      double a,
                      double b)

Convert LAB to RGB.

Parameters:: L -; a -; b -
Returns:: RGB values

LABtoRGB

public int[] LABtoRGB(double[] Lab)

Parameters:: Lab -
Returns:: RGB values

LABtoXYZ

public double[] LABtoXYZ(double L,
                         double a,
                         double b)

Convert LAB to XYZ.

Parameters:: L -; a -; b -
Returns:: XYZ values

LABtoXYZ
```
public double[] LABtoXYZ(double[] Lab)
```
Convert LAB to XYZ.

Parameters:

Lab -

Returns:

XYZ values

RGBtoHSB
```
public double[] RGBtoHSB(int R,
                         int G,
                         int B)
```
Parameters:

R - Red in range 0..255

G - Green in range 0..255

B - Blue in range 0..255

Returns:

HSB values: H is 0..360 degrees / 360 (0..1), S is 0..1, B is 0..1

RGBtoHSB

public double[] RGBtoHSB(int[] RGB)

RGBtoLAB
```
public double[] RGBtoLAB(int rgb)
```
Parameters:

rgb - RGB value

Returns:

Lab values

RGBtoLAB

public double[] RGBtoLAB(int[] RGB)

Parameters:: RGB -
Returns:: Lab values

RGBtoXYZ

public double[] RGBtoXYZ(int R,
                         int G,
                         int B)

Convert RGB to XYZ

Parameters:: R -; G -; B -
Returns:: XYZ in double array.

RGBtoXYZ
```
public double[] RGBtoXYZ(int[] RGB)
```
Convert RGB to XYZ

Parameters:

RGB -

Returns:

XYZ in double array.

xyYtoXYZ

public double[] xyYtoXYZ(double x,
                         double y,
                         double Y)

Parameters:: x -; y -; Y -
Returns:: XYZ values

xyYtoXYZ

public double[] xyYtoXYZ(double[] xyY)

Parameters:: xyY -
Returns:: XYZ values

XYZtoLAB

public double[] XYZtoLAB(double X,
                         double Y,
                         double Z)

Convert XYZ to LAB.

Parameters:: X -; Y -; Z -
Returns:: Lab values

XYZtoLAB
```
public double[] XYZtoLAB(double[] XYZ)
```
Convert XYZ to LAB.

Parameters:

XYZ -

Returns:

Lab values

XYZtoRGB

public int[] XYZtoRGB(double X,
                      double Y,
                      double Z)

Convert XYZ to RGB.

Parameters:: X -; Y -; Z -
Returns:: RGB in int array.

XYZtoRGB
```
public int[] XYZtoRGB(double[] XYZ)
```
Convert XYZ to RGB

Parameters:

XYZ - in a double array.

Returns:

RGB in int array.

XYZtoxyY

public double[] XYZtoxyY(double X,
                         double Y,
                         double Z)

Parameters:: X -; Y -; Z -
Returns:: xyY values

XYZtoxyY

public double[] XYZtoxyY(double[] XYZ)

Parameters:: XYZ -
Returns:: xyY values

RGBToLab

public ImagePlus RGBToLab(ImagePlus img)

Converts an RGB image into a Lab stack.

LabToRGB

public ImagePlus LabToRGB(ImagePlus img)

Converts a Lab stack into an RGB image.

Class ColorSpaceConverter

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

D50

D55

D65

D75

whitePoint

chromaD50

chromaD55

chromaD65

chromaD75

chromaWhitePoint

M

Mi

Constructor Detail

ColorSpaceConverter

ColorSpaceConverter

Method Detail

HSBtoRGB

HSBtoRGB

LABtoRGB

LABtoRGB

LABtoXYZ

LABtoXYZ

RGBtoHSB

RGBtoHSB

RGBtoLAB

RGBtoLAB

RGBtoXYZ

RGBtoXYZ

xyYtoXYZ

xyYtoXYZ

XYZtoLAB

XYZtoLAB

XYZtoRGB

XYZtoRGB

XYZtoxyY

XYZtoxyY

RGBToLab

LabToRGB