org.openimaj.math.geometry.transforms.residuals

Class AlgebraicResidual2d<M extends Model<Point2d,Point2d> & MatrixTransformProvider>

java.lang.Object

org.openimaj.math.geometry.transforms.residuals.AlgebraicResidual2d<M>

Type Parameters:

M -

All Implemented Interfaces:

ResidualCalculator<Point2d,Point2d,M>

public class AlgebraicResidual2d<M extends Model<Point2d,Point2d> & MatrixTransformProvider>
extends Object
implements ResidualCalculator<Point2d,Point2d,M>

Compute the algebraic residuals of points mapped by a 2d homogeneous transform (i.e. a 3x3 transform matrix). This is equivalent to the residuals minimised when using the Direct Linear Transform method (i.e. minimising |Ah|) used for estimating the transform.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
AlgebraicResidual2d()

Method Summary

Modifier and Type	Method and Description
double	computeResidual(IndependentPair<Point2d,Point2d> data) Compute the residual for a single point
void	computeResiduals(List<? extends IndependentPair<Point2d,Point2d>> data, double[] residuals) Compute the residual for a set of data points
void	setModel(M model) Set the current model being evaluated.

Methods inherited from class java.lang.Object

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

Constructor Detail

AlgebraicResidual2d

public AlgebraicResidual2d()

Method Detail

setModel

public void setModel(M model)

Description copied from interface: ResidualCalculator

Set the current model being evaluated. This should be called every time the model has changed internally, as the ResidualCalculator might pre-cache variables based on the model for error computation.

Specified by:

setModel in interface ResidualCalculator<Point2d,Point2d,M extends Model<Point2d,Point2d> & MatrixTransformProvider>

Parameters:

model - the model

computeResidual

public double computeResidual(IndependentPair<Point2d,Point2d> data)

Description copied from interface: ResidualCalculator

Compute the residual for a single point

Specified by:

computeResidual in interface ResidualCalculator<Point2d,Point2d,M extends Model<Point2d,Point2d> & MatrixTransformProvider>

Parameters:

data - the data

Returns:

the error

computeResiduals

public void computeResiduals(List<? extends IndependentPair<Point2d,Point2d>> data,
                             double[] residuals)

Description copied from interface: ResidualCalculator

Compute the residual for a set of data points

Specified by:

computeResiduals in interface ResidualCalculator<Point2d,Point2d,M extends Model<Point2d,Point2d> & MatrixTransformProvider>

Parameters:

data - the data

residuals - the array to write the residuals into