jaitools.media.jai.rangelookup
Class RangeLookupDescriptor

java.lang.Object
  javax.media.jai.OperationDescriptorImpl
      jaitools.media.jai.rangelookup.RangeLookupDescriptor

All Implemented Interfaces:

Serializable, javax.media.jai.OperationDescriptor, javax.media.jai.RegistryElementDescriptor

public class RangeLookupDescriptor
extends javax.media.jai.OperationDescriptorImpl

Describes the "RangeLookup" operation.

This is a variation on the JAI javax.media.jai.LookupDescriptor. It works with a RangeLookupTable object in which each entry maps a source image value range to a destination image value.

Example of use...

 // Perform a lookup as follows:
 //   Src Value     Dest Value
 //     x < 5            1
 //   5 <= x < 10        2
 //  10 <= x <= 20       3
 //  any other value    99
 
 RenderedImage myIntImg = ...

 RangeLookupTable table = new RangeLookupTable(99);

 Range r = new Range(null, true, 5, false);  // x < 5
 table.add(r, 1);

 r = new Range(5, true, 10, false);  // 5 <= x < 10
 table.add(r, 2);

 r = new Range(10, true, 20, true);  // 10 <= x <= 20
 table.add(r, 2);

 ParameterBlockJAI pb = new ParameterBlockJAI("rangelookup");
 pb.setSource("source0", myIntImg);
 pb.setParameter("table", table);
 RenderedImage luImg = JAI.create("rangelookup", pb);
 

Since:

1.0

Version:

$Id: RangeLookupDescriptor.java 1383 2011-02-10 11:22:29Z michael.bedward $

Author:

Michael Bedward

See Also:

Range, RangeLookupTable, Serialized Form

Field Summary

Fields inherited from class javax.media.jai.OperationDescriptorImpl

resources, sourceNames, supportedModes

Fields inherited from interface javax.media.jai.OperationDescriptor

NO_PARAMETER_DEFAULT

Constructor Summary

RangeLookupDescriptor()
Constructor.

Method Summary

boolean	arePropertiesSupported()
static javax.media.jai.RenderedOp	create(RenderedImage source0, RangeLookupTable table, RenderingHints hints) Convenience method which constructs a ParameterBlockJAI and invokes JAI.create("RangeLookup", params) .

Methods inherited from class javax.media.jai.OperationDescriptorImpl

getDefaultSourceClass, getDestClass, getDestClass, getInvalidRegion, getName, getNumParameters, getNumSources, getParamClasses, getParamDefaults, getParamDefaultValue, getParameterListDescriptor, getParamMaxValue, getParamMinValue, getParamNames, getPropertyGenerators, getPropertyGenerators, getRenderableDestClass, getRenderableSourceClasses, getResourceBundle, getResources, getSourceClasses, getSourceClasses, getSourceNames, getSupportedModes, isImmediate, isModeSupported, isRenderableSupported, isRenderedSupported, makeDefaultSourceClassList, validateArguments, validateArguments, validateParameters, validateParameters, validateRenderableArguments, validateRenderableSources, validateSources, validateSources

Methods inherited from class java.lang.Object

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

Constructor Detail

RangeLookupDescriptor

public RangeLookupDescriptor()

Constructor.

Method Detail

arePropertiesSupported

public boolean arePropertiesSupported()

Specified by:

arePropertiesSupported in interface javax.media.jai.RegistryElementDescriptor

Overrides:

arePropertiesSupported in class javax.media.jai.OperationDescriptorImpl

create

public static javax.media.jai.RenderedOp create(RenderedImage source0,
                                                RangeLookupTable table,
                                                RenderingHints hints)

Convenience method which constructs a ParameterBlockJAI and invokes JAI.create("RangeLookup", params) .

Parameters:

source0 - the source image

table - an instance of RangeLookupTable defining the mappings from source image value ranges to destination image values

hints - rendering hints (may be null)

Returns:

the RenderedOp destination