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java.lang.Object
|
+--javax.media.jai.OperationDescriptorImpl
|
+--javax.media.jai.operator.PolarToComplexDescriptor
An OperationDescriptor describing the "PolarToComplex"
operation.
The "PolarToComplex" operation creates an image with complex-valued pixels from two images the respective pixel values of which represent the magnitude (modulus) and phase of the corresponding complex pixel in the destination image. The source images should have the same number of bands. The first source image contains the magnitude values and the second source image the phase values. The destination will have twice as many bands with the even-indexed bands (0, 2, ...) representing the real and the odd-indexed bands (1, 3, ...) the imaginary parts of each pixel. The pixel values of the destination image are defined for a given complex sample by the pseudocode:
dst[x][y][2*b] = src0[x][y][b]*Math.cos(src1[x][y][b]) dst[x][y][2*b+1] = src0[x][y][b]*Math.sin(src1[x][y][b])where the index b varies from zero to one less than the number of bands in the source images.
For phase images with integral data type, it is assumed that the actual phase angle is scaled from the range [-PI, PI] to the range [0, MAX_VALUE] where MAX_VALUE is the maximum value of the data type in question.
"PolarToComplex" defines a PropertyGenerator that sets the "COMPLEX"
property of the image to java.lang.Boolean.TRUE, which may
be retrieved by calling the getProperty() method with
"COMPLEX" as the property name.
| Name | Value |
|---|---|
| GlobalName | PolarToComplex |
| LocalName | PolarToComplex |
| Vendor | com.sun.media.jai |
| Description | Computes a complex image from a magnitude and a phase image. |
| DocURL | http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/PolarToComplexDescriptor.html |
| Version | 1.0 |
No parameters are needed for the "PolarToComplex" operation.
OperationDescriptor,
PhaseDescriptor, Serialized Form| Fields inherited from class javax.media.jai.OperationDescriptorImpl |
resources, sourceNames, supportedModes |
| Fields inherited from interface javax.media.jai.OperationDescriptor |
NO_PARAMETER_DEFAULT |
| Constructor Summary | |
PolarToComplexDescriptor()
Constructor. |
|
| Method Summary | |
static RenderedOp |
create(RenderedImage source0,
RenderedImage source1,
RenderingHints hints)
Computes a complex image from a magnitude and a phase image. |
static RenderableOp |
createRenderable(RenderableImage source0,
RenderableImage source1,
RenderingHints hints)
Computes a complex image from a magnitude and a phase image. |
PropertyGenerator[] |
getPropertyGenerators(String modeName)
Returns an array of PropertyGenerators implementing
property inheritance for the "Conjugate" operation. |
protected boolean |
validateSources(String modeName,
ParameterBlock args,
StringBuffer msg)
Validates the input sources. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public PolarToComplexDescriptor()
| Method Detail |
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 images have the same number of bands.
validateSources in class OperationDescriptorImpljavax.media.jai.OperationDescriptorImplmodeName - 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 PropertyGenerator[] getPropertyGenerators(String modeName)
PropertyGenerators implementing
property inheritance for the "Conjugate" operation.getPropertyGenerators in class OperationDescriptorImpl
public static RenderedOp create(RenderedImage source0,
RenderedImage source1,
RenderingHints hints)
Creates a ParameterBlockJAI from all
supplied arguments except hints and invokes
JAI.create(String,ParameterBlock,RenderingHints).
source0 - RenderedImage source 0.source1 - RenderedImage source 1.hints - The RenderingHints to use.
May be null.RenderedOp destination.IllegalArgumentException - if source0 is null.IllegalArgumentException - if source1 is null.JAI,
ParameterBlockJAI,
RenderedOp
public static RenderableOp createRenderable(RenderableImage source0,
RenderableImage source1,
RenderingHints hints)
Creates a ParameterBlockJAI from all
supplied arguments except hints and invokes
JAI.createRenderable(String,ParameterBlock,RenderingHints).
source0 - RenderableImage source 0.source1 - RenderableImage source 1.hints - The RenderingHints to use.
May be null.RenderableOp destination.IllegalArgumentException - if source0 is null.IllegalArgumentException - if source1 is null.JAI,
ParameterBlockJAI,
RenderableOp
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