rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage > Class Template Reference

#include <rtkSeparableQuadraticSurrogateRegularizationImageFilter.h>

Inheritance diagram for rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >:

Collaboration diagram for rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >:

Public Types
using	Pointer = itk::SmartPointer< Self >
using	Self = SeparableQuadraticSurrogateRegularizationImageFilter
using	Superclass = itk::ImageToImageFilter< TImage, TImage >

Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother () const
virtual const char *	GetNameOfClass () const
virtual void	SetRadius (typename TImage::RegionType::SizeType _arg)
virtual TImage::RegionType::SizeType	GetRadius ()
virtual void	SetRegularizationWeights (typename TImage::PixelType _arg)
virtual TImage::PixelType	GetRegularizationWeights ()

Static Public Member Functions
static Pointer	New ()

Protected Member Functions
	SeparableQuadraticSurrogateRegularizationImageFilter ()
	~SeparableQuadraticSurrogateRegularizationImageFilter () override=default
itk::ProcessObject::DataObjectPointer	MakeOutput (itk::ProcessObject::DataObjectPointerArraySizeType idx) override
itk::ProcessObject::DataObjectPointer	MakeOutput (const itk::ProcessObject::DataObjectIdentifierType &) override
void	DynamicThreadedGenerateData (const typename TImage::RegionType &outputRegionForThread) override
void	GenerateInputRequestedRegion () override
TImage::PixelType	GreenPriorFirstDerivative (typename TImage::PixelType pix)
TImage::PixelType	GreenPriorSecondDerivative (typename TImage::PixelType pix)

Protected Attributes
itk::PixelTraits< typename TImage::PixelType >::ValueType	m_C1
itk::PixelTraits< typename TImage::PixelType >::ValueType	m_C2
TImage::RegionType::SizeType	m_Radius
TImage::PixelType	m_RegularizationWeights

Detailed Description

template<typename TImage>
class rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >

For one-step inversion of spectral CT data by the method Mechlem2017, computes regularization term's first and second derivatives.

In SQS-based methods (Long2014, Weidinger2016, Mechlem2017), the regularization term is typically the sum of the "absolute values" of the differences between each pixel and its neighbours. Instead of the actual absolute value function, which can't be differentiated in zero, smooth approximations are used, e.g. the Huber function. Here, we employ another approximation, described in "Bayesian Reconstructions From Emission Tomography Data Using a Modified EM Algorithm", by Peter J. Green, IEEE TMI 1990. With respect to Huber, it has the advantage of not requiring a cut-off parameter.

Definition at line 44 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

Member Typedef Documentation

Pointer

template<typename TImage >

using rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::Pointer = itk::SmartPointer<Self>

Definition at line 53 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

Self

template<typename TImage >

using rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::Self = SeparableQuadraticSurrogateRegularizationImageFilter

Standard class type alias.

Definition at line 51 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

Superclass

template<typename TImage >

using rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::Superclass = itk::ImageToImageFilter<TImage, TImage>

Definition at line 52 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

Constructor & Destructor Documentation

SeparableQuadraticSurrogateRegularizationImageFilter()

template<typename TImage >

rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::SeparableQuadraticSurrogateRegularizationImageFilter ( )

protected

~SeparableQuadraticSurrogateRegularizationImageFilter()

template<typename TImage >

rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::~SeparableQuadraticSurrogateRegularizationImageFilter ( )

overrideprotecteddefault

Member Function Documentation

CreateAnother()

template<typename TImage >

virtual::itk::LightObject::Pointer rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::CreateAnother ( ) const

virtual

Reimplemented from itk::Object.

DynamicThreadedGenerateData()

template<typename TImage >

void rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::DynamicThreadedGenerateData ( const typename TImage::RegionType &  outputRegionForThread )

overrideprotected

Does the real work.

GenerateInputRequestedRegion()

template<typename TImage >

void rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GenerateInputRequestedRegion ( )

overrideprotectedvirtual

Does the real work.

Reimplemented from itk::ProcessObject.

GetNameOfClass()

template<typename TImage >

virtual const char* rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GetNameOfClass ( ) const

virtual

Run-time type information (and related methods).

Reimplemented from itk::ImageSource< TOutputImage >.

GetRadius()

template<typename TImage >

virtual TImage::RegionType::SizeType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GetRadius ( )

virtual

Set/Get for the radius

GetRegularizationWeights()

template<typename TImage >

virtual TImage::PixelType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GetRegularizationWeights ( )

virtual

Set/Get for the regularization weights

GreenPriorFirstDerivative()

template<typename TImage >

TImage::PixelType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GreenPriorFirstDerivative ( typename TImage::PixelType  pix )

protected

Derivatives of the absolute value approximation

GreenPriorSecondDerivative()

template<typename TImage >

TImage::PixelType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::GreenPriorSecondDerivative ( typename TImage::PixelType  pix )

protected

Derivatives of the absolute value approximation

MakeOutput() [1/2]

template<typename TImage >

itk::ProcessObject::DataObjectPointer rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::MakeOutput ( itk::ProcessObject::DataObjectPointerArraySizeType  idx )

overrideprotectedvirtual

Creates the Outputs

Reimplemented from itk::ImageSource< TOutputImage >.

MakeOutput() [2/2]

template<typename TImage >

itk::ProcessObject::DataObjectPointer rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::MakeOutput ( const itk::ProcessObject::DataObjectIdentifierType &  )

overrideprotectedvirtual

Creates the Outputs

Reimplemented from itk::ImageSource< TOutputImage >.

New()

template<typename TImage >

static Pointer rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::New ( )

static

Method for creation through the object factory.

SetRadius()

template<typename TImage >

virtual void rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::SetRadius ( typename TImage::RegionType::SizeType  _arg )

virtual

Set/Get for the radius

SetRegularizationWeights()

template<typename TImage >

virtual void rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::SetRegularizationWeights ( typename TImage::PixelType  _arg )

virtual

Set/Get for the regularization weights

Member Data Documentation

m_C1

template<typename TImage >

itk::PixelTraits<typename TImage::PixelType>::ValueType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::m_C1

protected

Definition at line 103 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

m_C2

template<typename TImage >

itk::PixelTraits<typename TImage::PixelType>::ValueType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::m_C2

protected

Definition at line 104 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

m_Radius

template<typename TImage >

TImage::RegionType::SizeType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::m_Radius

protected

Member variables

Definition at line 102 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

m_RegularizationWeights

template<typename TImage >

TImage::PixelType rtk::SeparableQuadraticSurrogateRegularizationImageFilter< TImage >::m_RegularizationWeights

protected

Definition at line 105 of file rtkSeparableQuadraticSurrogateRegularizationImageFilter.h.

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

• rtkSeparableQuadraticSurrogateRegularizationImageFilter.h