Package org.anchoranalysis.plugin.points.bean.fitter

Class LinearLeastSquaresEllipsoidFitter

Object

AnchorBean<PointsFitter>

InitializableBean<PointsFitter,PointsInitialization>

PointsBean<PointsFitter>

PointsFitter

ConicFitterBase

LinearLeastSquaresEllipsoidFitter

All Implemented Interfaces:

CompatibleWithMark

public class LinearLeastSquaresEllipsoidFitter
extends ConicFitterBase

Fits an ellipsoid to points using a linear least squares approach

Specifically the approach of Li and Griffiths in 'Least Squares Ellipsoid Specific Fitting' (2004) is employed.

Some references

• generalized eigenvalues in wolfram
• ellipsoid_fit matlab function
• To convert back into normal ellipsoid form

Author:

Owen Feehan

Constructor Summary

Constructors

Constructor	Description
LinearLeastSquaresEllipsoidFitter()

Method Summary

Modifier and Type	Method	Description
void	fit(List<Point3f> points, Mark mark, Dimensions dimensions)	Fits a mark to a set of points within given dimensions.
double	getMinRadius()
boolean	isCompatibleWith(Mark testMark)	Tests if the implementing object is compatible with a mark of a particular type.
boolean	isSuppressZCovariance()
void	setMinRadius(double minRadius)
void	setSuppressZCovariance(boolean suppressZCovariance)

Methods inherited from class org.anchoranalysis.plugin.points.bean.fitter.ConicFitterBase

assignTo, getInputPointShift, getScaleRadii, getShell, getSubtractRadii, setInputPointShift, setScaleRadii, setShell, setSubtractRadii

Methods inherited from class org.anchoranalysis.bean.initializable.InitializableBean

getInitialization, getLogger, getPropertyInitializer, initialize, initializeRecursive, initRecursiveWithInitializer, isInitialized, onInitialization

Methods inherited from class org.anchoranalysis.bean.AnchorBean

checkMisconfigured, describeBean, describeChildren, duplicateBean, fields, findFieldsOfClass, getBeanName, getLocalPath, localise, toString

Methods inherited from class java.lang.Object

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

Constructor Details

LinearLeastSquaresEllipsoidFitter

public LinearLeastSquaresEllipsoidFitter()

Method Details

isCompatibleWith

public boolean isCompatibleWith(Mark testMark)

Description copied from interface: CompatibleWithMark

Tests if the implementing object is compatible with a mark of a particular type.

Parameters:

testMark - the mark to test for compatibility

Returns:

true if the implementing object is compatible with the given mark, false otherwise

fit

public void fit(List<Point3f> points,
 Mark mark,
 Dimensions dimensions)
         throws PointsFitterException

Description copied from class: PointsFitter

Fits a mark to a set of points within given dimensions.

Specified by:

fit in class PointsFitter

Parameters:

points - the list of points to fit the mark to

mark - the mark to be fitted (will be modified)

dimensions - the dimensions within which the fitting occurs

Throws:

PointsFitterException - if an error occurs during the fitting process

getMinRadius

public double getMinRadius()

setMinRadius

public void setMinRadius(double minRadius)

isSuppressZCovariance

public boolean isSuppressZCovariance()

setSuppressZCovariance

public void setSuppressZCovariance(boolean suppressZCovariance)