javax.media.jai.operator
Class BinarizeDescriptor

java.lang.Object
  javax.media.jai.OperationDescriptorImpl
      javax.media.jai.operator.BinarizeDescriptor

All Implemented Interfaces:

OperationDescriptor, RegistryElementDescriptor, Serializable

public class BinarizeDescriptor

extends OperationDescriptorImpl

An OperationDescriptor describing the "Binarize" operation.

The "Binarize" operation takes one rendered or renderable single-banded source image and a threshold value and applies a thresholding operation to the produce a bilevel image.

By default the destination image bounds are equal to those of the source image. The SampleModel of the destination image is an instance of MultiPixelPackedSampleModel.

The pseudocode for "Binarize" is as follows:

 
      dst(x, y) = src(x, y) >= threshold ? 1 : 0;
 

Resource List

Name	Value
GlobalName	Binarize
LocalName	Binarize
Vendor	com.sun.media.jai
Description	Thresholds an image into a bilevel image.
DocURL	http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/BinarizeDescriptor.html
Version	1.1
arg0Desc	The threshold value.

Parameter List

Name	Class Type	Default Value
threshold	java.lang.Double	NO_PARAMETER_DEFAULT

Since:

JAI 1.1

See Also:

OperationDescriptor, Serialized Form

Field Summary

Fields inherited from class javax.media.jai.OperationDescriptorImpl

sourceNames

Fields inherited from interface javax.media.jai.OperationDescriptor

NO_PARAMETER_DEFAULT

Constructor Summary

BinarizeDescriptor()
Constructor.

Method Summary

static RenderedOp	create(RenderedImage source0, Double threshold, RenderingHints hints) Binarize an image from a threshold value.
static RenderableOp	createRenderable(RenderableImage source0, Double threshold, RenderingHints hints) Binarize an image from a threshold value.
protected boolean	validateSources(String modeName, ParameterBlock args, StringBuffer msg) Validates the input source.

Methods inherited from class javax.media.jai.OperationDescriptorImpl

arePropertiesSupported, 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

Methods inherited from class java.lang.Object

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

Constructor Detail

BinarizeDescriptor

public BinarizeDescriptor()

Constructor.

Method Detail

validateSources

protected boolean validateSources(String modeName,
                                  ParameterBlock args,
                                  StringBuffer msg)

Validates the input source.

In addition to the standard checks performed by the superclass method, this method checks that the source image is single-banded.

Overrides:

validateSources in class OperationDescriptorImpl

Parameters:

modeName - the operation mode name

args - a ParameterBlock that has the sources

msg - A string that may contain error messages.

See Also:

OperationDescriptorImpl.validateArguments(java.lang.String, java.awt.image.renderable.ParameterBlock, java.lang.StringBuffer)

create

public static RenderedOp create(RenderedImage source0,
                                Double threshold,
                                RenderingHints hints)

Binarize an image from a threshold value.

Creates a ParameterBlockJAI from all supplied arguments except hints and invokes JAI.create(String,ParameterBlock,RenderingHints).

Parameters:

source0 - RenderedImage source 0.

threshold - Argment must be of type java.lang.Double.

hints - The RenderingHints to use. May be null.

Returns:

The RenderedOp destination.

Throws:

IllegalArgumentException - if source0 is null.

IllegalArgumentException - if threshold is null.

See Also:

JAI, ParameterBlockJAI, RenderedOp

createRenderable

public static RenderableOp createRenderable(RenderableImage source0,
                                            Double threshold,
                                            RenderingHints hints)

Binarize an image from a threshold value.

Creates a ParameterBlockJAI from all supplied arguments except hints and invokes JAI.createRenderable(String,ParameterBlock,RenderingHints).

Parameters:

source0 - RenderableImage source 0.

threshold - Argment must be of type java.lang.Double.

hints - The RenderingHints to use. May be null.

Returns:

The RenderableOp destination.

Throws:

IllegalArgumentException - if source0 is null.

IllegalArgumentException - if threshold is null.

See Also:

JAI, ParameterBlockJAI, RenderableOp