optics.graphics
Class ColourScale

java.lang.Object
  java.awt.color.ColorSpace
      optics.graphics.ColourScale

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

GammaGreyScale, LinearGreyScale

public class ColourScale
extends java.awt.color.ColorSpace

Class to implement a ColorSpace for direct display of single plane Float/Double images using standard Java classes.

See Also:

Serialized Form

Field Summary

protected double	gamma Gamma correction value
protected double	lowerLimit Lowest pixel limit
protected static float	MAX_VALUE Static final Max valie of 1.0
protected static float	MIN_VALUE Static final Min Value of 0.0
protected boolean	reverse Constract reverse flag.
protected double	upperLimit Highest pixel limit

Fields inherited from class java.awt.color.ColorSpace

CS_CIEXYZ, CS_GRAY, CS_LINEAR_RGB, CS_PYCC, CS_sRGB, TYPE_2CLR, TYPE_3CLR, TYPE_4CLR, TYPE_5CLR, TYPE_6CLR, TYPE_7CLR, TYPE_8CLR, TYPE_9CLR, TYPE_ACLR, TYPE_BCLR, TYPE_CCLR, TYPE_CMY, TYPE_CMYK, TYPE_DCLR, TYPE_ECLR, TYPE_FCLR, TYPE_GRAY, TYPE_HLS, TYPE_HSV, TYPE_Lab, TYPE_Luv, TYPE_RGB, TYPE_XYZ, TYPE_YCbCr, TYPE_Yxy

Constructor Summary

ColourScale()
Default consturctor needed to initialise underlying class.

Method Summary

float[]	fromCIEXYZ(float[] rgb) Required implementation of fromCIEXYZ conversion (not used)
float[]	fromRGB(float[] rgb) Implements fromfromRGB (not used)
double	getGamma() Method to get the current gamma
double	getLowerLimit() Method to get the current lower limit.
double	getUpperLimit() Method to get the current upper limit.
protected float	scaledPixelValue(float value) Method to form the scaled pixel value in the range MIN_VALUE - > MAX_VALUE wrt to the current lower and upper limits.
void	setGamma(double g) Method to set gamma
void	setLimits(double min, double max) Method to set the ranges.
void	setLowerLimit(double min) Method to set the lower limit (upper will remain unchanged)
void	setReverseContarst(boolean b) Meth ot set/unset reverse contarst, (defaults to false)
void	setUpperLimit(double max) Method to set the upper limit, (lower will remain unhanged)
float[]	toCIEXYZ(float[] values) Required implementation of fromCIEXYZ conversion (not used)
float[]	toRGB(float value) Return the rgb value for a single input pixel value.
float[]	toRGB(float[] values) Implement method from ColorSpace to give RGB values as floats.

Methods inherited from class java.awt.color.ColorSpace

getInstance, getMaxValue, getMinValue, getName, getNumComponents, getType, isCS_sRGB

Methods inherited from class java.lang.Object

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

Field Detail

MIN_VALUE

protected static final float MIN_VALUE

Static final Min Value of 0.0

See Also:

Constant Field Values

MAX_VALUE

protected static final float MAX_VALUE

Static final Max valie of 1.0

See Also:

Constant Field Values

lowerLimit

protected double lowerLimit

Lowest pixel limit

upperLimit

protected double upperLimit

Highest pixel limit

gamma

protected double gamma

Gamma correction value

reverse

protected boolean reverse

Constract reverse flag.

Constructor Detail

ColourScale

public ColourScale()

Default consturctor needed to initialise underlying class. (not normally called by users).

Method Detail

toCIEXYZ

public float[] toCIEXYZ(float[] values)

Required implementation of fromCIEXYZ conversion (not used)

Specified by:

toCIEXYZ in class java.awt.color.ColorSpace

fromCIEXYZ

public float[] fromCIEXYZ(float[] rgb)

Required implementation of fromCIEXYZ conversion (not used)

Specified by:

fromCIEXYZ in class java.awt.color.ColorSpace

toRGB

public float[] toRGB(float[] values)

Implement method from ColorSpace to give RGB values as floats.

Specified by:

toRGB in class java.awt.color.ColorSpace

Parameters:

values - array of input values, only [0] used

Returns:

float[] rgb values.

fromRGB

public float[] fromRGB(float[] rgb)

Implements fromfromRGB (not used)

Specified by:

fromRGB in class java.awt.color.ColorSpace

toRGB

public float[] toRGB(float value)

Return the rgb value for a single input pixel value. This method should be overoaded by the extending classes.

Parameters:

value - the pixel value

Returns:

float[] the rgb values.

setLimits

public void setLimits(double min,
                      double max)

Method to set the ranges.

Parameters:

min - the lower value

max - the upper value

getLowerLimit

public double getLowerLimit()

Method to get the current lower limit.

Returns:

double current lower limit.

getUpperLimit

public double getUpperLimit()

Method to get the current upper limit.

Returns:

double current upper limit.

setLowerLimit

public void setLowerLimit(double min)

Method to set the lower limit (upper will remain unchanged)

Parameters:

min - the new lower limit

setUpperLimit

public void setUpperLimit(double max)

Method to set the upper limit, (lower will remain unhanged)

Parameters:

max - the new upper limit

setGamma

public void setGamma(double g)

Method to set gamma

Parameters:

g - the gamma factor

getGamma

public double getGamma()

Method to get the current gamma

setReverseContarst

public void setReverseContarst(boolean b)

Meth ot set/unset reverse contarst, (defaults to false)

scaledPixelValue

protected float scaledPixelValue(float value)

Method to form the scaled pixel value in the range MIN_VALUE - > MAX_VALUE wrt to the current lower and upper limits.

Parameters:

value - the input pixel value.

Returns:

float scaled pixel value.