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gnu.java.awt.color
Class ColorLookUpTable  

java.lang.Object
  gnu.java.awt.color.ColorLookUpTable

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public class ColorLookUpTable

extends java.lang.Object

ColorLookUpTable handles color lookups through a color lookup table, as defined in the ICC specification. Both 'mft2' and 'mft1' (8 and 16-bit) type CLUTs are handled. This will have to be updated later for ICC 4.0.0

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Field Summary
(package private)  double[]	clut
private static float[]	D50           CIE 1931 D50 white point (in Lab coordinates)
(package private)  int	gridpoints
(package private)  float[][]	inMatrix
(package private)  boolean	inputLab
(package private)  double[][]	inTable
(package private)  int[]	multiplier
(package private)  int	nClut
(package private)  int	nIn           Number of input/output channels
(package private)  int	nInTableEntries
(package private)  int	nOut           Number of input/output channels
(package private)  int	nOutTableEntries
(package private)  int[]	offsets
(package private)  boolean	outputLab
(package private)  short[][]	outTable
(package private)  boolean	useMatrix

 

Constructor Summary

ColorLookUpTable(java.awt.color.ICC_Profile profile, int tag)           Constructor Requires a profile file to get the CLUT from and the tag of the CLUT to create.

 

Method Summary
private  float[]	LabtoXYZ(float[] in)           Converts CIE Lab coordinates to (D50) XYZ ones.
(package private)  float[]	lookup(float[] in)           Performs a lookup through the Color LookUp Table.
private  void	readClut16(byte[] data)           Loads a 16-bit CLUT into our data structures
private  void	readClut8(byte[] data)           Loads a 8-bit CLUT into our data structures.
private  float[]	XYZtoLab(float[] in)           Converts CIE XYZ coordinates to Lab ones.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

D50

private static float[] D50

CIE 1931 D50 white point (in Lab coordinates)

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nIn

int nIn

Number of input/output channels

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nOut

int nOut

Number of input/output channels

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nInTableEntries

int nInTableEntries

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nOutTableEntries

int nOutTableEntries

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gridpoints

int gridpoints

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nClut

int nClut

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inTable

double[][] inTable

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outTable

short[][] outTable

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clut

double[] clut

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inMatrix

float[][] inMatrix

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useMatrix

boolean useMatrix

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multiplier

int[] multiplier

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offsets

int[] offsets

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inputLab

boolean inputLab

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outputLab

boolean outputLab

Constructor Detail

ColorLookUpTable

public ColorLookUpTable(java.awt.color.ICC_Profile profile,
                        int tag)

Constructor Requires a profile file to get the CLUT from and the tag of the CLUT to create. (icSigXToYZTag where X,Y = [A | B], Z = [0,1,2])

Method Detail

readClut16

private void readClut16(byte[] data)

Loads a 16-bit CLUT into our data structures

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readClut8

private void readClut8(byte[] data)

Loads a 8-bit CLUT into our data structures.

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lookup

float[] lookup(float[] in)

Performs a lookup through the Color LookUp Table. If the CLUT tag type is AtoB the conversion will be from the device color space to the PCS, BtoA type goes in the opposite direction. For convenience, the PCS values for input or output will always be CIE XYZ (D50), if the actual PCS is Lab, the values will be converted. N-dimensional linear interpolation is used.

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LabtoXYZ

private float[] LabtoXYZ(float[] in)

Converts CIE Lab coordinates to (D50) XYZ ones.

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XYZtoLab

private float[] XYZtoLab(float[] in)

Converts CIE XYZ coordinates to Lab ones.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> gnu >> java >> awt >> [ color overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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