skyview.geometry

Class Distorter

java.lang.Object

skyview.geometry.Transformer

skyview.geometry.Distorter

All Implemented Interfaces:

java.io.Serializable, Component

Direct Known Subclasses:

DSS, DSS.DSSInv, Neat, Neat.NeatInv, SIP, SIP.SIPinverse

public abstract class Distorter
extends Transformer
implements Component

This class defines a non-linear distortion in the image plane. Normally the forward distortion converts from a fiducial projection plane to some distorted coordinates. The reverse distortion transforms from the distorted coordinates back to the fiducial coordinates.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Distorter()

Method Summary

Modifier and Type	Method and Description
boolean	applyBeforeScaling()
abstract java.lang.String	getDescription() What does this object do?
protected int	getInputDimension() What is the input dimensionality of a Distorter?
abstract java.lang.String	getName() A name for this object
protected int	getOutputDimension() What is the output dimensionality of a Distorter?
abstract Distorter	inverse() Get the inverse of the transformation.
double[][]	jacobian(double[] pix) Get the local Jacobian for the distortion.

Methods inherited from class skyview.geometry.Transformer

isInverse, transform, transform, transform

Methods inherited from class java.lang.Object

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

Constructor Detail

Distorter

public Distorter()

Method Detail

getName

public abstract java.lang.String getName()

A name for this object

Specified by:

getName in interface Component

getDescription

public abstract java.lang.String getDescription()

What does this object do?

Specified by:

getDescription in interface Component

inverse

public abstract Distorter inverse()

Description copied from class: Transformer

Get the inverse of the transformation. If the order matters, then the inverse is to be applied after the original transformation. This is primarily an issue with Converters.

Specified by:

inverse in class Transformer

getOutputDimension

protected int getOutputDimension()

What is the output dimensionality of a Distorter?

Specified by:

getOutputDimension in class Transformer

getInputDimension

protected int getInputDimension()

What is the input dimensionality of a Distorter?

Specified by:

getInputDimension in class Transformer

jacobian

public double[][] jacobian(double[] pix)

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.

Parameters:

pix - The input position.

Returns:

The Jabobian matrix.

applyBeforeScaling

public boolean applyBeforeScaling()