itk::ImageHelper< NImageDimension, NLoop > Class Template Reference

#include <itkImageHelper.h>

List of all members.

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Detailed Description

template<unsigned int NImageDimension, unsigned int NLoop>
class itk::ImageHelper< NImageDimension, NLoop >

Fast Index/Offset computation.

These helper methods use recursive templates to unroll the loops of simple calculations. The resulting speed improvement varies from compiler to compiler. Some gcc compilers with debug turned on exhibit slight speed increases, but most compilers see improvement. The ComputeOffset performance improvement is impressive. For example, the Windows VS7.0 compiler shows almost a factor of 2 speed improvement with the recursive templates. Usually recursive templates use partial specialization to terminate loops. Here we use a technique used by Brad King in the itk Concept Checking code.

Note:

This work is part of the National Alliance for Medical Image Computing (NAMIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149. Information on the National Centers for Biomedical Computing can be obtained from http://nihroadmap.nih.gov/bioinformatics.

Definition at line 53 of file itkImageHelper.h.

Public Types
typedef ImageBase< NImageDimension >	ImageType
typedef ImageType::IndexType	IndexType
typedef ImageType::IndexValueType	IndexValueType
typedef ImageType::OffsetType	OffsetType
typedef ImageType::OffsetValueType	OffsetValueType
typedef Concept::Detail::UniqueType_bool< false >	UniqueTypeBoolFalse
typedef Concept::Detail::UniqueType_bool< true >	UniqueTypeBoolTrue
Static Public Member Functions
static void	ComputeIndex (const IndexType &bufferedRegionIndex, OffsetValueType offset, const OffsetValueType offsetTable[], IndexType &index)
static void	ComputeIndexInner (const IndexType &bufferedRegionIndex, OffsetValueType &offset, const OffsetValueType[], IndexType &index, const UniqueTypeBoolTrue &)
static void	ComputeIndexInner (const IndexType &bufferedRegionIndex, OffsetValueType &offset, const OffsetValueType offsetTable[], IndexType &index, const UniqueTypeBoolFalse &)
static void	ComputeOffset (const IndexType &bufferedRegionIndex, const IndexType &index, const OffsetValueType offsetTable[], OffsetValueType &offset)
static void	ComputeOffsetInner (const IndexType &bufferedRegionIndex, const IndexType &index, const OffsetValueType[], OffsetValueType &offset, const UniqueTypeBoolTrue &)
static void	ComputeOffsetInner (const IndexType &bufferedRegionIndex, const IndexType &index, const OffsetValueType offsetTable[], OffsetValueType &offset, const UniqueTypeBoolFalse &)

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Member Typedef Documentation

template<unsigned int NImageDimension, unsigned int NLoop>

typedef ImageBase<NImageDimension> itk::ImageHelper< NImageDimension, NLoop >::ImageType

Definition at line 56 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef ImageType::IndexType itk::ImageHelper< NImageDimension, NLoop >::IndexType

Definition at line 57 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef ImageType::IndexValueType itk::ImageHelper< NImageDimension, NLoop >::IndexValueType

Definition at line 59 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef ImageType::OffsetType itk::ImageHelper< NImageDimension, NLoop >::OffsetType

Definition at line 58 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef ImageType::OffsetValueType itk::ImageHelper< NImageDimension, NLoop >::OffsetValueType

Definition at line 60 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef Concept::Detail::UniqueType_bool<false> itk::ImageHelper< NImageDimension, NLoop >::UniqueTypeBoolFalse

Definition at line 61 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

typedef Concept::Detail::UniqueType_bool<true> itk::ImageHelper< NImageDimension, NLoop >::UniqueTypeBoolTrue

Definition at line 62 of file itkImageHelper.h.

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Member Function Documentation

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeIndex	(	const IndexType &	bufferedRegionIndex,
		OffsetValueType	offset,
		const OffsetValueType	offsetTable[],
		IndexType &	index
	)			[inline, static]

ComputeIndex with recursive templates

Definition at line 65 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeIndexInner	(	const IndexType &	bufferedRegionIndex,
		OffsetValueType &	offset,
		const	OffsetValueType[],
		IndexType &	index,
		const UniqueTypeBoolTrue &
	)			[inline, static]

Definition at line 96 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeIndexInner	(	const IndexType &	bufferedRegionIndex,
		OffsetValueType &	offset,
		const OffsetValueType	offsetTable[],
		IndexType &	index,
		const UniqueTypeBoolFalse &
	)			[inline, static]

Definition at line 78 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeOffset	(	const IndexType &	bufferedRegionIndex,
		const IndexType &	index,
		const OffsetValueType	offsetTable[],
		OffsetValueType &	offset
	)			[inline, static]

Definition at line 108 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeOffsetInner	(	const IndexType &	bufferedRegionIndex,
		const IndexType &	index,
		const	OffsetValueType[],
		OffsetValueType &	offset,
		const UniqueTypeBoolTrue &
	)			[inline, static]

Definition at line 137 of file itkImageHelper.h.

template<unsigned int NImageDimension, unsigned int NLoop>

static void itk::ImageHelper< NImageDimension, NLoop >::ComputeOffsetInner	(	const IndexType &	bufferedRegionIndex,
		const IndexType &	index,
		const OffsetValueType	offsetTable[],
		OffsetValueType &	offset,
		const UniqueTypeBoolFalse &
	)			[inline, static]

Definition at line 121 of file itkImageHelper.h.

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The documentation for this class was generated from the following file:

• itkImageHelper.h

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