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java.lang.Object | +--javax.media.jai.OperationDescriptorImpl | +--javax.media.jai.operator.MagnitudeSquaredDescriptor
An OperationDescriptor
describing the
"MagnitudeSquared" operation.
The "MagnitudeSquared" operation computes the squared magnitude or of each pixel of a complex image. The source image must have an even number of bands, with the even bands (0, 2, ...) representing the real parts and the odd bands (1, 3, ...) the imaginary parts of each complex pixel. The destination image has at most half the number of bands of the source image with each sample in a pixel representing the magnitude of the corresponding complex source sample. The magnitude squared values of the destination image are defined for a given sample by the pseudocode:
dstPixel[x][y][b] = src[x][y][2*b]^2 + src[x][y][2*b + 1]^2where the number of bands b varies from zero to one less than the number of bands in the destination image.
For integral image datatypes, the result will be rounded and clamped as needed.
"MagnitudeSquared" defines a PropertyGenerator that sets the "COMPLEX"
property of the image to java.lang.Boolean.FALSE
, which may
be retrieved by calling the getProperty()
method with
"COMPLEX" as the property name.
Name | Value |
---|---|
GlobalName | MagnitudeSquared |
LocalName | MagnitudeSquared |
Vendor | com.sun.media.jai |
Description | Computes the squared magnitude of each pixel of a complex image. |
DocURL | http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MagnitudeSquaredDescriptor.html |
Version | 1.0 |
No parameters are needed for the "MagnitudeSquared" operation.
OperationDescriptor
, Serialized FormFields inherited from class javax.media.jai.OperationDescriptorImpl |
resources, sourceNames, supportedModes |
Fields inherited from interface javax.media.jai.OperationDescriptor |
NO_PARAMETER_DEFAULT |
Constructor Summary | |
MagnitudeSquaredDescriptor()
Constructor. |
Method Summary | |
static RenderedOp |
create(RenderedImage source0,
RenderingHints hints)
Computes the squared magnitude of each pixel of a complex image. |
static RenderableOp |
createRenderable(RenderableImage source0,
RenderingHints hints)
Computes the squared magnitude of each pixel of a complex image. |
PropertyGenerator[] |
getPropertyGenerators(String modeName)
Returns an array of PropertyGenerators implementing
property inheritance for the "MagnitudeSquared" operation. |
protected boolean |
validateSources(String modeName,
ParameterBlock args,
StringBuffer msg)
Validates the input source. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public MagnitudeSquaredDescriptor()
Method Detail |
public PropertyGenerator[] getPropertyGenerators(String modeName)
PropertyGenerators
implementing
property inheritance for the "MagnitudeSquared" operation.getPropertyGenerators
in class OperationDescriptorImpl
protected boolean validateSources(String modeName, ParameterBlock args, StringBuffer msg)
In addition to the standard checks performed by the superclass method, this method checks that the source image has an even number of bands.
validateSources
in class OperationDescriptorImpl
javax.media.jai.OperationDescriptorImpl
modeName
- the operation mode nameargs
- a ParameterBlock
that has the sourcesmsg
- A string that may contain error messages.IllegalArgumentException
- if any of the input parameters are null
.OperationDescriptorImpl.validateArguments(java.lang.String, java.awt.image.renderable.ParameterBlock, java.lang.StringBuffer)
public static RenderedOp create(RenderedImage source0, RenderingHints hints)
Creates a ParameterBlockJAI
from all
supplied arguments except hints
and invokes
JAI.create(String,ParameterBlock,RenderingHints)
.
source0
- RenderedImage
source 0.hints
- The RenderingHints
to use.
May be null
.RenderedOp
destination.IllegalArgumentException
- if source0
is null
.JAI
,
ParameterBlockJAI
,
RenderedOp
public static RenderableOp createRenderable(RenderableImage source0, RenderingHints hints)
Creates a ParameterBlockJAI
from all
supplied arguments except hints
and invokes
JAI.createRenderable(String,ParameterBlock,RenderingHints)
.
source0
- RenderableImage
source 0.hints
- The RenderingHints
to use.
May be null
.RenderableOp
destination.IllegalArgumentException
- if source0
is null
.JAI
,
ParameterBlockJAI
,
RenderableOp
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