BSplineInterpolator (ImgLib2 Javadocs 0-SNAPSHOT API)

java.lang.Object
- net.imglib2.AbstractEuclideanSpace
- - net.imglib2.position.transform.AbstractPositionableTransform<LocalizablePositionable>
  - - net.imglib2.position.transform.Floor<RandomAccess<Neighborhood<T>>>
    - - net.imglib2.algorithm.interpolation.randomaccess.BSplineInterpolator<T>

Type Parameters:

T - the image type

All Implemented Interfaces:

EuclideanSpace, Positionable, RealLocalizable, RealPositionable, RealRandomAccess<T>, Sampler<T>
```
public class BSplineInterpolator<T extends RealType<T>>
extends Floor<RandomAccess<Neighborhood<T>>>
implements 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(RandomAccessible<T> source, int radius, boolean clipping)`
`protected`	`BSplineInterpolator(RandomAccessibleInterval<T> randomAccessible)` Build a default cubic-bspline interpolator.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
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()` Access the actual T instance providing access to a pixel, sub-pixel or integral region value the `Sampler` points at.

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 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(RandomAccessible<T> source,
                           int radius,
                           boolean clipping)
```
  - BSplineInterpolator
```
protected BSplineInterpolator(RandomAccessibleInterval<T> randomAccessible)
```
    Build a default cubic-bspline interpolator.
    
    Parameters:
    
    randomAccessible - the random accessible
- Method Detail
  - get
```
public T get()
```
    Description copied from interface: Sampler
    
    Access the actual T instance providing access to a pixel, sub-pixel or integral region value the Sampler points at.
    
    Specified by:
    
    get in interface Sampler<T extends RealType<T>>
  - fillWeights
```
protected void fillWeights()
```
  - copy
```
public BSplineInterpolator<T> copy()
```
    Specified by:
    
    copy in interface Sampler<T extends RealType<T>>
    
    Returns:
    
    - A new Sampler in the same state accessing the same values. It does NOT copy T, just the state of the Sampler. Otherwise use T.copy() if available. Sampler.copy().get() == Sampler.get(), i.e. both hold the same value, not necessarily the same instance (this is the case for an ArrayCursor for example)
  - copyRealRandomAccess
```
public BSplineInterpolator<T> copyRealRandomAccess()
```
    Specified by:
    
    copyRealRandomAccess in interface RealRandomAccess<T extends RealType<T>>
  - evaluate3Normalized
```
public static double evaluate3Normalized(double u)
```
  - cubicCardinalSpline
```
public static double cubicCardinalSpline(double x,
                                         int width)
```

Class BSplineInterpolator<T extends RealType<T>>

Field Summary

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

Fields inherited from class net.imglib2.AbstractEuclideanSpace

Constructor Summary

Method Summary

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

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

Methods inherited from class net.imglib2.AbstractEuclideanSpace

Methods inherited from class java.lang.Object

Methods inherited from interface net.imglib2.RealRandomAccess

Methods inherited from interface net.imglib2.RealLocalizable

Methods inherited from interface net.imglib2.RealPositionable

Methods inherited from interface net.imglib2.Positionable

Methods inherited from interface net.imglib2.EuclideanSpace

Field Detail

SQRT3

ALPHA

FACTOR

ONESIXTH

TWOTHIRDS

FOURTHIRDS

w

value

weights

clipping

radius

shape

Constructor Detail

BSplineInterpolator

BSplineInterpolator

BSplineInterpolator

Method Detail

get

fillWeights

copy

copyRealRandomAccess

evaluate3Normalized

cubicCardinalSpline