Package skyview.geometry.distorter
Class DSS.DSSInv
- java.lang.Object
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- skyview.geometry.Transformer
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- skyview.geometry.Distorter
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- skyview.geometry.distorter.DSS.DSSInv
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- All Implemented Interfaces:
java.io.Serializable
,Component
- Enclosing class:
- DSS
public class DSS.DSSInv extends Distorter
This inner class is the inverse of the DSS Distorter and corrects the distortion generated there. For the DSS projection, this direction is described analytically using a polynomial expansion, while the 'forward' distortion must be done by inverting the polynomial using Newton's method.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description DSSInv()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getDescription()
Get a description of this componentjava.lang.String
getName()
Get the name of this componentDistorter
inverse()
Get the inverse DistorterDistorter
invert()
Get the forward distorter backboolean
isInverse(Transformer t)
Is this the inverse of another distorter?double[][]
jacobian(double[] x)
Get the local Jacobian for the distortion.void
transform(double[] x, double[] y)
Transform a point-
Methods inherited from class skyview.geometry.Distorter
applyBeforeScaling, getInputDimension, getOutputDimension
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Methods inherited from class skyview.geometry.Transformer
transform, transform
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Method Detail
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invert
public Distorter invert()
Get the forward distorter back
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getName
public java.lang.String getName()
Get the name of this component
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getDescription
public java.lang.String getDescription()
Get a description of this component- Specified by:
getDescription
in interfaceComponent
- Specified by:
getDescription
in classDistorter
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inverse
public Distorter inverse()
Get the inverse Distorter
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isInverse
public boolean isInverse(Transformer t)
Is this the inverse of another distorter?- Specified by:
isInverse
in classTransformer
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transform
public void transform(double[] x, double[] y)
Transform a point- Specified by:
transform
in classTransformer
- Parameters:
x
- The input vector.y
- The output vector, it may be the same as the input vector if the dimensionalities are the same. All transformers are expected to work with aliased inputs and output.
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jacobian
public double[][] jacobian(double[] x)
Description copied from class:Distorter
Get the local Jacobian for the distortion. This implementation defers the calculation to the inverse distorter. Clearly this will need to be overriden in either the forward or backward distorter.
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