net.imglib2.algorithm.interpolation.randomaccess

Class BSplineInterpolator<T extends net.imglib2.type.numeric.RealType<T>>

java.lang.Object

net.imglib2.AbstractEuclideanSpace

net.imglib2.position.transform.AbstractPositionableTransform<LocalizablePositionable>

net.imglib2.position.transform.Floor<net.imglib2.RandomAccess<Neighborhood<T>>>

net.imglib2.algorithm.interpolation.randomaccess.BSplineInterpolator<T>

Type Parameters:

T - the image type

All Implemented Interfaces:

net.imglib2.EuclideanSpace, net.imglib2.Positionable, net.imglib2.RealLocalizable, net.imglib2.RealPositionable, net.imglib2.RealRandomAccess<T>, net.imglib2.Sampler<T>, net.imglib2.Typed<T>

public class BSplineInterpolator<T extends net.imglib2.type.numeric.RealType<T>>
extends net.imglib2.position.transform.Floor<net.imglib2.RandomAccess<Neighborhood<T>>>
implements net.imglib2.RealRandomAccess<T>

Performs cubic b-spline interpolation by pre-computing coefficients on the fly. This will be less time efficient, in general, than pre-computing coefficients using a BSplineDecomposition. This will be more memory-efficient though. See Unser, Aldroubi, and Eden "Fast B-Spline Transforms for Continuous Image Representation and Interpolation" IEEE PAMI 13(3) 1991.

Author:

John Bogovic, Stephan Preibisch, Stephan Saalfeld, Tobias Pietzsch

Field Summary

Fields

Modifier and Type	Field and Description
static double	ALPHA
protected boolean	clipping
static double	FACTOR
static double	FOURTHIRDS
static double	ONESIXTH
protected int	radius
protected RectangleShape	shape
static double	SQRT3
static double	TWOTHIRDS
protected T	value
protected double	w
protected double[][]	weights

Fields inherited from class net.imglib2.position.transform.AbstractPositionableTransform

discrete, position, target

Fields inherited from class net.imglib2.AbstractEuclideanSpace

n

Constructor Summary

Constructors

Modifier	Constructor and Description
	BSplineInterpolator(BSplineInterpolator<T> interpolator)
	BSplineInterpolator(net.imglib2.RandomAccessible<T> source, int radius, boolean clipping)
protected	BSplineInterpolator(net.imglib2.RandomAccessibleInterval<T> randomAccessible) Build a default cubic-bspline interpolator.

Method Summary

Modifier and Type	Method and Description
BSplineInterpolator<T>	copy()
BSplineInterpolator<T>	copyRealRandomAccess()
static double	cubicCardinalSpline(double x, int width)
static double	evaluate3Normalized(double u)
protected void	fillWeights()
T	get()
T	getType()

Methods inherited from class net.imglib2.position.transform.Floor

floor, floor, floor, floor, floor, move, move, move, move, move, setPosition, setPosition, setPosition, setPosition, setPosition

Methods inherited from class net.imglib2.position.transform.AbstractPositionableTransform

bck, fwd, getDoublePosition, getFloatPosition, localize, localize, move, move, move, move, move, setPosition, setPosition, setPosition, setPosition, setPosition, toString

Methods inherited from class net.imglib2.AbstractEuclideanSpace

numDimensions

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.imglib2.RealRandomAccess

setPositionAndGet, setPositionAndGet, setPositionAndGet

Methods inherited from interface net.imglib2.RealLocalizable

getDoublePosition, getFloatPosition, localize, localize, localize, positionAsDoubleArray, positionAsRealPoint

Methods inherited from interface net.imglib2.RealPositionable

move, move, move, move, move, setPosition, setPosition, setPosition, setPosition, setPosition

Methods inherited from interface net.imglib2.Positionable

bck, fwd, move, move, move, move, move, setPosition, setPosition, setPosition, setPosition, setPosition

Methods inherited from interface net.imglib2.EuclideanSpace

numDimensions

Field Detail

SQRT3

public static final double SQRT3

ALPHA

public static final double ALPHA

FACTOR

public static final double FACTOR

ONESIXTH

public static final double ONESIXTH

See Also:

Constant Field Values

TWOTHIRDS

public static final double TWOTHIRDS

See Also:

Constant Field Values

FOURTHIRDS

public static final double FOURTHIRDS

See Also:

Constant Field Values

w

protected double w

value

protected final T extends net.imglib2.type.numeric.RealType<T> value

weights

protected final double[][] weights

clipping

protected final boolean clipping

radius

protected final int radius

shape

protected final RectangleShape shape

Constructor Detail

BSplineInterpolator

public BSplineInterpolator(BSplineInterpolator<T> interpolator)

BSplineInterpolator

public BSplineInterpolator(net.imglib2.RandomAccessible<T> source,
                           int radius,
                           boolean clipping)

BSplineInterpolator

protected BSplineInterpolator(net.imglib2.RandomAccessibleInterval<T> randomAccessible)

Build a default cubic-bspline interpolator.

Parameters:

randomAccessible - the random accessible

Method Detail

get

public T get()

Specified by:

get in interface net.imglib2.Sampler<T extends net.imglib2.type.numeric.RealType<T>>

getType

public T getType()

Specified by:

getType in interface net.imglib2.Sampler<T extends net.imglib2.type.numeric.RealType<T>>

Specified by:

getType in interface net.imglib2.Typed<T extends net.imglib2.type.numeric.RealType<T>>

fillWeights

protected void fillWeights()

copy

public BSplineInterpolator<T> copy()

Specified by:

copy in interface net.imglib2.RealRandomAccess<T extends net.imglib2.type.numeric.RealType<T>>

Specified by:

copy in interface net.imglib2.Sampler<T extends net.imglib2.type.numeric.RealType<T>>

copyRealRandomAccess

public BSplineInterpolator<T> copyRealRandomAccess()

Specified by:

copyRealRandomAccess in interface net.imglib2.RealRandomAccess<T extends net.imglib2.type.numeric.RealType<T>>

evaluate3Normalized

public static double evaluate3Normalized(double u)

cubicCardinalSpline

public static double cubicCardinalSpline(double x,
                                         int width)