Class Any2LsRGBRed

java.lang.Object

org.apache.batik.ext.awt.image.rendered.AbstractRed

org.apache.batik.ext.awt.image.rendered.Any2LsRGBRed

All Implemented Interfaces:

RenderedImage, CachableRed

public class Any2LsRGBRed
extends AbstractRed

This function will tranform an image from any colorspace into a luminance image. The alpha channel if any will be copied to the new image.

Version:

$Id$

Field Summary

Fields

Modifier and Type	Field	Description
private static final double	GAMMA	Gamma for linear to sRGB convertion
private static final double	LFACT
(package private) boolean	srcIssRGB
private static final int[]	sRGBToLsRGBLut	Lookup tables for RGB lookups.

Fields inherited from class AbstractRed

bounds, cm, minTileX, minTileY, numXTiles, numYTiles, props, sm, srcs, tileGridXOff, tileGridYOff, tileHeight, tileWidth

Constructor Summary

Constructors

Constructor	Description
Any2LsRGBRed(CachableRed src)	Construct a luminace image from src.

Method Summary

Modifier and Type	Method	Description
WritableRaster	copyData(WritableRaster wr)
protected static ColorModel	fixColorModel(CachableRed src)	This function 'fixes' the source's color model.
protected static SampleModel	fixSampleModel(CachableRed src)	This function 'fixes' the source's sample model.
static final double	sRGBToLsRGB(double value)

Methods inherited from class AbstractRed

copyBand, copyToRaster, getBounds, getColorModel, getData, getData, getDependencyRegion, getDirtyRegion, getHeight, getMinTileX, getMinTileY, getMinX, getMinY, getNumXTiles, getNumYTiles, getProperty, getPropertyNames, getSampleModel, getSources, getTile, getTileGridXOffset, getTileGridYOffset, getTileHeight, getTileWidth, getWidth, getXTile, getYTile, init, init, makeTile, updateTileGridInfo

Methods inherited from class Object

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

Field Details

srcIssRGB

boolean srcIssRGB

GAMMA

private static final double GAMMA

Gamma for linear to sRGB convertion

See Also:

• Constant Field Values

LFACT

private static final double LFACT

See Also:

• Constant Field Values

sRGBToLsRGBLut

private static final int[] sRGBToLsRGBLut

Lookup tables for RGB lookups. The linearToSRGBLut is used when noise values are considered to be on a linearScale. The linearToLinear table is used when the values are considered to be on the sRGB scale to begin with.

Constructor Details

Any2LsRGBRed

public Any2LsRGBRed(CachableRed src)

Construct a luminace image from src.

Parameters:

src - The image to convert to a luminance image

Method Details

sRGBToLsRGB

public static final double sRGBToLsRGB(double value)

copyData

public WritableRaster copyData(WritableRaster wr)

fixColorModel

protected static ColorModel fixColorModel(CachableRed src)

This function 'fixes' the source's color model. Right now it just selects if it should have one or two bands based on if the source had an alpha channel.

fixSampleModel

protected static SampleModel fixSampleModel(CachableRed src)

This function 'fixes' the source's sample model. Right now it just selects if it should have 3 or 4 bands based on if the source had an alpha channel.