Package net.imglib2.view
Class RandomAccessibleOnRealRandomAccessible<T>
- java.lang.Object
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- net.imglib2.AbstractEuclideanSpace
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- net.imglib2.view.RandomAccessibleOnRealRandomAccessible<T>
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- All Implemented Interfaces:
EuclideanSpace
,RandomAccessible<T>
,View
public class RandomAccessibleOnRealRandomAccessible<T> extends AbstractEuclideanSpace implements RandomAccessible<T>, View
RandomAccessible
on aRealRandomAccessible
. For optimal performance, no integer coordinates are stored in theRandomAccess
but only method calls passed through to an actualRealRandomAccess
. Therefore, localization into integer fields performs a Math.round operation per field and is thus not very efficient. Localization into real fields, however, is passed through and thus performs optimally.- Author:
- Stephan Saalfeld
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Nested Class Summary
Nested Classes Modifier and Type Class Description protected class
RandomAccessibleOnRealRandomAccessible.RandomAccessOnRealRandomAccessible
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Field Summary
Fields Modifier and Type Field Description protected RealRandomAccessible<T>
source
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Fields inherited from class net.imglib2.AbstractEuclideanSpace
n
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Constructor Summary
Constructors Constructor Description RandomAccessibleOnRealRandomAccessible(RealRandomAccessible<T> source)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RealRandomAccessible<T>
getSource()
RandomAccess<T>
randomAccess()
Create a random access sampler for integer coordinates.RandomAccess<T>
randomAccess(Interval interval)
Create a random access sampler for integer coordinates.-
Methods inherited from class net.imglib2.AbstractEuclideanSpace
numDimensions
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface net.imglib2.EuclideanSpace
numDimensions
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Field Detail
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source
protected final RealRandomAccessible<T> source
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Constructor Detail
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RandomAccessibleOnRealRandomAccessible
public RandomAccessibleOnRealRandomAccessible(RealRandomAccessible<T> source)
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Method Detail
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getSource
public RealRandomAccessible<T> getSource()
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randomAccess
public RandomAccess<T> randomAccess()
Description copied from interface:RandomAccessible
Create a random access sampler for integer coordinates.The returned random access covers as much of the domain as possible.
Please note:RandomAccessibleInterval
s have a finite domain (theirInterval
), soRandomAccessible.randomAccess()
is only guaranteed to cover this finite domain. This may lead to unexpected results when usingViews
. In the following codeRandomAccessible<T> extended = Views.extendBorder( img ) RandomAccessibleInterval<T> cropped = Views.interval( extended, img ); RandomAccess<T> a1 = extended.randomAccess(); RandomAccess<T> a2 = cropped.randomAccess();
Theaccess
a1
on the extended image is valid everywhere. However, somewhat counter-intuitively, theaccess
a2
on the extended and cropped image is only valid on the intervalimg
to which the extended image was cropped. The access is only required to cover this interval, because it is the domain of the cropped image.Views
attempts to provide the fastest possible access that meets this requirement, and will therefore strip the extension. To deal with this, if you know that you need to access pixels outside the domain of theRandomAccessibleInterval
, and you know that theRandomAccessibleInterval
is actually defined beyond its interval boundaries, then use theRandomAccessible.randomAccess(Interval)
variant and specify which interval you actually want to access. In the above example,RandomAccess<T> a2 = cropped.randomAccess( Intervals.expand( img, 10 ) );
will provide the extended access as expected.- Specified by:
randomAccess
in interfaceRandomAccessible<T>
- Returns:
- random access sampler
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randomAccess
public RandomAccess<T> randomAccess(Interval interval)
Description copied from interface:RandomAccessible
Create a random access sampler for integer coordinates.The returned random access is intended to be used in the specified interval only. Thus, the RandomAccessible may provide optimized versions. If the interval is completely contained in the domain, the random access is guaranteed to provide the same values as that obtained by
RandomAccessible.randomAccess()
within the interval.- Specified by:
randomAccess
in interfaceRandomAccessible<T>
- Parameters:
interval
- in which interval you intend to use the random access.- Returns:
- random access sampler
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