Package com.luciad.imaging.operator.util

Class TLcdComponentColorLookupTable

java.lang.Object

com.luciad.imaging.operator.util.ALcdColorLookupTable

com.luciad.imaging.operator.util.TLcdComponentColorLookupTable

public class TLcdComponentColorLookupTable
extends ALcdColorLookupTable

A color lookup table that transforms each color component individually.

This represents a color transformations where each component of an input color is is mapped to the same component in the output color. A component-based filter typically requires less memory then a 3D table but it can only transform each component individually. Hence it is only suitable for color effects that do not mix multiple image components. For example a negative filter fits these limitations but a hue filter does not. You can use the builder to conveniently create component-based lookup tables.

A component-based lookup table can also be combined with a 3D table to efficiently implement non-linear color transformations:

1. Use a component lookup table to remove the non-linearity of the transformation.
2. Use a (transformed) 3D table to apply the actual transformation.

The tables used in this approach can typically be much smaller than with a single table.

A color is transformed by using each component as coordinate in its 1D lookup table. Assuming color components in [0,1], the color (0.0, 0.0, 0.0) is mapped to the first table entries and the color (1.0, 1.0, 1.0) to the last table entries. The other table entries are uniformly distributed between these. The values that lie between the table entries are computed depending on the ELcdInterpolationType. The alpha component of the color is unchanged.

Note that the interval on the component lookup tables are not used.

Since:

2013.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TLcdComponentColorLookupTable.Builder<B extends TLcdComponentColorLookupTable.Builder<B>>	Builder for component-based color lookup table's.

Constructor Summary

Constructors

Constructor	Description
TLcdComponentColorLookupTable(TLcdLookupTable aRedLut, TLcdLookupTable aGreenLut, TLcdLookupTable aBlueLut)	Creates a component-based color lookup table.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
TLcdLookupTable	getBlueLookupTable()	Returns the lookup table for the blue color component.
TLcdLookupTable	getGreenLookupTable()	Returns the lookup table for the green color component.
TLcdLookupTable	getRedLookupTable()	Returns the lookup table for the red color component.
int	hashCode()
static TLcdComponentColorLookupTable.Builder<?>	newBuilder()	Creates a new builder with the default values.

Methods inherited from class java.lang.Object

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

Constructor Details

TLcdComponentColorLookupTable

public TLcdComponentColorLookupTable(TLcdLookupTable aRedLut,
 TLcdLookupTable aGreenLut,
 TLcdLookupTable aBlueLut)

Creates a component-based color lookup table.

The lookup table should have 1 dimension and each entry should have 1 component.

Parameters:

aRedLut - the lookup table for the red color component

aGreenLut - the lookup table for the green color component

aBlueLut - the lookup table for the blue color component

Method Details

getRedLookupTable

public TLcdLookupTable getRedLookupTable()

Returns the lookup table for the red color component.

Returns:

the lookup table for the red color component.

getGreenLookupTable

public TLcdLookupTable getGreenLookupTable()

Returns the lookup table for the green color component.

Returns:

the lookup table for the green color component.

getBlueLookupTable

public TLcdLookupTable getBlueLookupTable()

Returns the lookup table for the blue color component.

Returns:

the lookup table for the blue color component.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

newBuilder

public static TLcdComponentColorLookupTable.Builder<?> newBuilder()

Creates a new builder with the default values.

Returns:

the new builder.

hashCode

public int hashCode()

Overrides:

hashCode in class Object