com.luciad.imaging.operator

LuciadLightspeedClass TLcdIndexLookupOp

java.lang.Object

com.luciad.imaging.operator.ALcdImageOperator

com.luciad.imaging.operator.TLcdIndexLookupOp

public final class TLcdIndexLookupOp
extends ALcdImageOperator

Performs a color lookup using a single-band image.

The TLcdLookupTable specified must satisfy the following constraints:

• 1-dimensional
• 4 components per pixel, red/green/blue/alpha

The range of values that is mapped to the lookup table is determined as follows:

1. The range in [MIN_VALUE, MAX_VALUE] if they are specified.
2. The range in [ALcdBandSemantics.getMinValue(), ALcdBandSemantics.getMaxValue()] if they are specified.
3. The full normalized range of the band otherwise.

Example

 // Define the table colors
 // With interpolation enabled, a smooth gradient is automatically created
 byte[] lookupColors = new byte[]{         0,          0, (byte) 255, (byte) 255,  // blue
                                           0, (byte) 255, (byte) 255, (byte) 255,
                                           0, (byte) 255,          0, (byte) 255,  // green
                                  (byte) 255, (byte) 255,          0, (byte) 255,
                                  (byte) 255,          0,          0, (byte) 255}; // red

 TLcdLookupTable indexLookupTable = TLcdLookupTable.newBuilder()
   .dimensions(5)
   .componentCount(4)
   .data(ByteBuffer.wrap(lookupColors))
   .build();

 //use a chain. First bandSelect then indexLookUp
 ALcdImageOperatorChain chain = ALcdImageOperatorChain.newBuilder()
                                                      .bandSelect(new int[]{0})
                                                      .indexLookup(indexLookupTable, new double[]{0.0, 0.0, 0.0, 0.0})
                                                      .build();

 ALcdImage outputImage = chain.apply(inputImage);
 

Input

Output

Since:

2014.0

Nested Class Summary

Nested classes/interfaces inherited from class com.luciad.imaging.operator.ALcdImageOperator

ALcdImageOperator.ImageOperatorTypeBuilder

Field Summary

Fields

Modifier and Type	Field and Description
static TLcdDataType	INDEX_LOOKUP_FILTER_TYPE Input data type of the operator.
static TLcdDataProperty	INPUT_IMAGE The input image.
static TLcdDataProperty	LOOKUP_TABLE The lookup table to use.
static String	NAME Name of the operator.
static TLcdDataProperty	NAN_COLOR The color to set invalid pixels to.

Fields inherited from class com.luciad.imaging.operator.ALcdImageOperator

INPUT_IMAGE_NAME

Constructor Summary

Constructors

Constructor and Description
TLcdIndexLookupOp() Default constructor.

Method Summary

Modifier and Type	Method and Description
ALcdImage	apply(ILcdDataObject aParameters) Applies this operator to the given input parameters.
static ALcdImage	indexLookup(ALcdImage aImage, TLcdLookupTable aLUT) Perform a color lookup operation.
static ALcdImage	indexLookup(ALcdImage aSource, TLcdLookupTable aLUT, double[] aNaNColor) Perform a color lookup operation.

Methods inherited from class com.luciad.imaging.operator.ALcdImageOperator

createTypeBuilder, createTypeBuilder, equals, getParameterDataType, hashCode, toString

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

Name of the operator.

See Also:

Constant Field Values

INPUT_IMAGE

public static final TLcdDataProperty INPUT_IMAGE

The input image.

LOOKUP_TABLE

public static final TLcdDataProperty LOOKUP_TABLE

The lookup table to use.

NAN_COLOR

public static final TLcdDataProperty NAN_COLOR

The color to set invalid pixels to.

INDEX_LOOKUP_FILTER_TYPE

public static final TLcdDataType INDEX_LOOKUP_FILTER_TYPE

Input data type of the operator.

Constructor Detail

TLcdIndexLookupOp

public TLcdIndexLookupOp()

Default constructor.

Method Detail

apply

public ALcdImage apply(ILcdDataObject aParameters)

Description copied from class: ALcdImageOperator

Applies this operator to the given input parameters. The parameters are stored in a data object which must be of the type given by ALcdImageOperator.getParameterDataType().

Specified by:

apply in class ALcdImageOperator

Parameters:

aParameters - the parameters for the operator

Returns:

the image produced by the operator

indexLookup

public static ALcdImage indexLookup(ALcdImage aImage,
                                    TLcdLookupTable aLUT)

Perform a color lookup operation.

Parameters:

aImage - the input image.

aLUT - the lookup table to use.

Returns:

an image equivalent to the input, with every value replaced by its corresponding color in the lookup table.

indexLookup

public static ALcdImage indexLookup(ALcdImage aSource,
                                    TLcdLookupTable aLUT,
                                    double[] aNaNColor)

Perform a color lookup operation.

Parameters:

aSource - the input image.

aLUT - the lookup table to use.

aNaNColor - color to use for pixels that have an invalid or no value.

Returns:

an image equivalent to the input, with every value replaced by its corresponding color in the lookup table.