#include <rtkBackProjectionImageFilter.h>

Inheritance diagram for rtk::BackProjectionImageFilter< TInputImage, TOutputImage >:

Collaboration diagram for rtk::BackProjectionImageFilter< TInputImage, TOutputImage >:

Public Types
using	ConstPointer = itk::SmartPointer< const Self >

using	GeometryConstPointer = typename GeometryType::ConstPointer

using	GeometryType = rtk::ThreeDCircularProjectionGeometry

using	InputPixelType = typename TInputImage::PixelType

using	InternalInputPixelType = typename TInputImage::InternalPixelType

using	OutputImageRegionType = typename TOutputImage::RegionType

using	Pointer = itk::SmartPointer< Self >

using	ProjectionImagePointer = typename ProjectionImageType::Pointer

using	ProjectionImageType = itk::Image< InputPixelType, TInputImage::ImageDimension - 1 >

using	ProjectionMatrixType = typename GeometryType::MatrixType

using	Self = BackProjectionImageFilter

using	Superclass = itk::ImageToImageFilter< TInputImage, TOutputImage >

Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother () const


virtual const char *	GetNameOfClass () const


virtual const GeometryType *	GetGeometry () const

virtual void	SetGeometry (const GeometryType *_arg)


virtual bool	GetTranspose ()

virtual void	SetTranspose (bool _arg)

Static Public Member Functions
static Pointer	New ()

Protected Member Functions
	BackProjectionImageFilter ()

void	BeforeThreadedGenerateData () override

virtual void	CylindricalDetectorCenteredOnSourceBackprojection (const OutputImageRegionType &region, const ProjectionMatrixType &volIndexToProjPP, const itk::Matrix< double, TInputImage::ImageDimension, TInputImage::ImageDimension > &projPPToProjIndex, const ProjectionImagePointer projection)

void	DynamicThreadedGenerateData (const OutputImageRegionType &outputRegionForThread) override

void	GenerateInputRequestedRegion () override

ProjectionMatrixType	GetIndexToIndexProjectionMatrix (const unsigned int iProj)

template<class TProjectionImage >
TProjectionImage::Pointer	GetProjection (const unsigned int iProj)

itk::Matrix< double, TInputImage::ImageDimension, TInputImage::ImageDimension >	GetProjectionPhysicalPointToProjectionIndexMatrix (const unsigned int iProj)

ProjectionMatrixType	GetVolumeIndexToProjectionPhysicalPointMatrix (const unsigned int iProj)

virtual void	OptimizedBackprojectionX (const OutputImageRegionType &region, const ProjectionMatrixType &matrix, const ProjectionImagePointer projection)

virtual void	OptimizedBackprojectionY (const OutputImageRegionType &region, const ProjectionMatrixType &matrix, const ProjectionImagePointer projection)

void	VerifyInputInformation () const override

void	VerifyPreconditions () const override

	~BackProjectionImageFilter () override=default

Protected Attributes
GeometryConstPointer	m_Geometry

Private Attributes
bool	m_Transpose { false }

Detailed Description

template<class TInputImage, class TOutputImage>
class rtk::BackProjectionImageFilter< TInputImage, TOutputImage >

3D backprojection

Backprojects a stack of projection images (input 1) in a 3D volume (input 0) using linear interpolation according to a specified geometry. The operation is voxel-based, meaning that the center of each voxel is projected in the projection images to determine the interpolation location.

Test:: rtkfovtest.cxx

Author: Simon Rit

Definition at line 50 of file rtkBackProjectionImageFilter.h.

Member Typedef Documentation

◆ ConstPointer

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::ConstPointer = itk::SmartPointer<const Self>

Definition at line 59 of file rtkBackProjectionImageFilter.h.

◆ GeometryConstPointer

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GeometryConstPointer = typename GeometryType::ConstPointer

Definition at line 65 of file rtkBackProjectionImageFilter.h.

◆ GeometryType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GeometryType = rtk::ThreeDCircularProjectionGeometry

Definition at line 64 of file rtkBackProjectionImageFilter.h.

◆ InputPixelType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::InputPixelType = typename TInputImage::PixelType

Definition at line 60 of file rtkBackProjectionImageFilter.h.

◆ InternalInputPixelType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::InternalInputPixelType = typename TInputImage::InternalPixelType

Definition at line 61 of file rtkBackProjectionImageFilter.h.

◆ OutputImageRegionType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::OutputImageRegionType = typename TOutputImage::RegionType

Definition at line 62 of file rtkBackProjectionImageFilter.h.

◆ Pointer

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::Pointer = itk::SmartPointer<Self>

Definition at line 58 of file rtkBackProjectionImageFilter.h.

◆ ProjectionImagePointer

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::ProjectionImagePointer = typename ProjectionImageType::Pointer

Definition at line 68 of file rtkBackProjectionImageFilter.h.

◆ ProjectionImageType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::ProjectionImageType = itk::Image<InputPixelType, TInputImage::ImageDimension - 1>

Definition at line 67 of file rtkBackProjectionImageFilter.h.

◆ ProjectionMatrixType

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::ProjectionMatrixType = typename GeometryType::MatrixType

Definition at line 66 of file rtkBackProjectionImageFilter.h.

◆ Self

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::Self = BackProjectionImageFilter

Standard class type alias.

Definition at line 56 of file rtkBackProjectionImageFilter.h.

◆ Superclass

template<class TInputImage, class TOutputImage>

using rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::Superclass = itk::ImageToImageFilter<TInputImage, TOutputImage>

Definition at line 57 of file rtkBackProjectionImageFilter.h.

Constructor & Destructor Documentation

◆ BackProjectionImageFilter()

template<class TInputImage, class TOutputImage>

rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::BackProjectionImageFilter ( )

inlineprotected

Definition at line 92 of file rtkBackProjectionImageFilter.h.

◆ ~BackProjectionImageFilter()

template<class TInputImage, class TOutputImage>

rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::~BackProjectionImageFilter ( )

overrideprotecteddefault

Member Function Documentation

◆ BeforeThreadedGenerateData()

template<class TInputImage, class TOutputImage>

void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::BeforeThreadedGenerateData ( )

overrideprotectedvirtual

Reimplemented from itk::ImageSource< TOutputImage >.

◆ CreateAnother()

template<class TInputImage, class TOutputImage>

virtual::itk::LightObject::Pointer rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::CreateAnother ( ) const

virtual

Reimplemented from itk::Object.

Reimplemented in rtk::JosephBackAttenuatedProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, rtk::JosephBackProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, rtk::ZengBackProjectionImageFilter< TInputImage, TOutputImage >, rtk::FDKWarpBackProjectionImageFilter< TInputImage, TOutputImage, TDeformation >, and rtk::FDKBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ CylindricalDetectorCenteredOnSourceBackprojection()

template<class TInputImage, class TOutputImage>

virtual void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::CylindricalDetectorCenteredOnSourceBackprojection	(	const OutputImageRegionType &	region,
		const ProjectionMatrixType &	volIndexToProjPP,
		const itk::Matrix< double, TInputImage::ImageDimension, TInputImage::ImageDimension > &	projPPToProjIndex,
		const ProjectionImagePointer	projection
	)

protectedvirtual

Special case when the detector is cylindrical and centered on source

◆ DynamicThreadedGenerateData()

template<class TInputImage, class TOutputImage>

void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::DynamicThreadedGenerateData ( const OutputImageRegionType & outputRegionForThread )

overrideprotectedvirtual

Reimplemented from itk::ImageSource< TOutputImage >.

Reimplemented in rtk::FDKBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ GenerateInputRequestedRegion()

template<class TInputImage, class TOutputImage>

void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GenerateInputRequestedRegion ( )

overrideprotectedvirtual

Apply changes to the input image requested region.

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

Reimplemented in rtk::JosephBackAttenuatedProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, and rtk::ZengBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ GetGeometry()

template<class TInputImage, class TOutputImage>

virtual const GeometryType* rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetGeometry ( ) const

virtual

Get / Set the object pointer to projection geometry

◆ GetIndexToIndexProjectionMatrix()

template<class TInputImage, class TOutputImage>

ProjectionMatrixType rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetIndexToIndexProjectionMatrix ( const unsigned int iProj )

protected

Creates iProj index to index projection matrices with current inputs instead of the physical point to physical point projection matrix provided by Geometry

◆ GetNameOfClass()

template<class TInputImage, class TOutputImage>

virtual const char* rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::InPlaceImageFilter< TInputImage, TOutputImage >.

Reimplemented in rtk::JosephBackAttenuatedProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, rtk::JosephBackProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, rtk::ZengBackProjectionImageFilter< TInputImage, TOutputImage >, rtk::FDKWarpBackProjectionImageFilter< TInputImage, TOutputImage, TDeformation >, and rtk::FDKBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ GetProjection()

template<class TInputImage, class TOutputImage>

template<class TProjectionImage >

TProjectionImage::Pointer rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetProjection ( const unsigned int iProj )

protected

The input is a stack of projections, we need to interpolate in one projection for efficiency during interpolation. Use of itk::ExtractImageFilter is not threadsafe in ThreadedGenerateData, this one is. The output can be multiplied by a constant. The function is templated to allow getting an itk::CudaImage.

◆ GetProjectionPhysicalPointToProjectionIndexMatrix()

template<class TInputImage, class TOutputImage>

itk::Matrix<double, TInputImage::ImageDimension, TInputImage::ImageDimension> rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetProjectionPhysicalPointToProjectionIndexMatrix ( const unsigned int iProj )

protected

◆ GetTranspose()

template<class TInputImage, class TOutputImage>

virtual bool rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetTranspose ( )

virtual

Get / Set the transpose flag for 2D projections (optimization trick)

◆ GetVolumeIndexToProjectionPhysicalPointMatrix()

template<class TInputImage, class TOutputImage>

ProjectionMatrixType rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::GetVolumeIndexToProjectionPhysicalPointMatrix ( const unsigned int iProj )

protected

◆ New()

template<class TInputImage, class TOutputImage>

static Pointer rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::New ( )

static

Method for creation through the object factory.

◆ OptimizedBackprojectionX()

template<class TInputImage, class TOutputImage>

virtual void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::OptimizedBackprojectionX	(	const OutputImageRegionType &	region,
		const ProjectionMatrixType &	matrix,
		const ProjectionImagePointer	projection
	)

protectedvirtual

Optimized version when the rotation is parallel to X, i.e. matrix[1][0] and matrix[2][0] are zeros.

Reimplemented in rtk::FDKBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ OptimizedBackprojectionY()

template<class TInputImage, class TOutputImage>

virtual void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::OptimizedBackprojectionY	(	const OutputImageRegionType &	region,
		const ProjectionMatrixType &	matrix,
		const ProjectionImagePointer	projection
	)

protectedvirtual

Optimized version when the rotation is parallel to Y, i.e. matrix[1][1] and matrix[2][1] are zeros.

Reimplemented in rtk::FDKBackProjectionImageFilter< TInputImage, TOutputImage >.

◆ SetGeometry()

template<class TInputImage, class TOutputImage>

virtual void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::SetGeometry ( const GeometryType * _arg )

virtual

Get / Set the object pointer to projection geometry

◆ SetTranspose()

template<class TInputImage, class TOutputImage>

virtual void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::SetTranspose ( bool _arg )

virtual

Get / Set the transpose flag for 2D projections (optimization trick)

◆ VerifyInputInformation()

template<class TInputImage, class TOutputImage>

void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::VerifyInputInformation ( ) const

inlineoverrideprotectedvirtual

The two inputs should not be in the same space so there is nothing to verify.

Reimplemented from itk::ImageToImageFilter< TInputImage, TOutputImage >.

Reimplemented in rtk::JosephBackProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, rtk::JosephBackAttenuatedProjectionImageFilter< TInputImage, TOutputImage, TInterpolationWeightMultiplication, TSplatWeightMultiplication, TSumAlongRay >, and rtk::ZengBackProjectionImageFilter< TInputImage, TOutputImage >.

Definition at line 139 of file rtkBackProjectionImageFilter.h.

◆ VerifyPreconditions()

template<class TInputImage, class TOutputImage>

void rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::VerifyPreconditions ( ) const

overrideprotectedvirtual

Checks that inputs are correctly set.

Reimplemented from itk::ProcessObject.

Member Data Documentation

◆ m_Geometry

template<class TInputImage, class TOutputImage>

GeometryConstPointer rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::m_Geometry

protected

RTK geometry object

Definition at line 162 of file rtkBackProjectionImageFilter.h.

◆ m_Transpose

template<class TInputImage, class TOutputImage>

bool rtk::BackProjectionImageFilter< TInputImage, TOutputImage >::m_Transpose { false }

private

Flip projection flag: infludences GetProjection and GetIndexToIndexProjectionMatrix for optimization

Definition at line 167 of file rtkBackProjectionImageFilter.h.

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

rtkBackProjectionImageFilter.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Attributes

Detailed Description

template<class TInputImage, class TOutputImage> class rtk::BackProjectionImageFilter< TInputImage, TOutputImage >

Member Typedef Documentation

◆ ConstPointer

◆ GeometryConstPointer

◆ GeometryType

◆ InputPixelType

◆ InternalInputPixelType

◆ OutputImageRegionType

◆ Pointer

◆ ProjectionImagePointer

◆ ProjectionImageType

◆ ProjectionMatrixType

◆ Self

◆ Superclass

Constructor & Destructor Documentation

◆ BackProjectionImageFilter()

◆ ~BackProjectionImageFilter()

Member Function Documentation

◆ BeforeThreadedGenerateData()

◆ CreateAnother()

◆ CylindricalDetectorCenteredOnSourceBackprojection()

◆ DynamicThreadedGenerateData()

◆ GenerateInputRequestedRegion()

◆ GetGeometry()

◆ GetIndexToIndexProjectionMatrix()

◆ GetNameOfClass()

◆ GetProjection()

◆ GetProjectionPhysicalPointToProjectionIndexMatrix()

◆ GetTranspose()

◆ GetVolumeIndexToProjectionPhysicalPointMatrix()

◆ New()

◆ OptimizedBackprojectionX()

◆ OptimizedBackprojectionY()

◆ SetGeometry()

◆ SetTranspose()

◆ VerifyInputInformation()

◆ VerifyPreconditions()

Member Data Documentation

◆ m_Geometry

◆ m_Transpose

template<class TInputImage, class TOutputImage>
class rtk::BackProjectionImageFilter< TInputImage, TOutputImage >