Projection building blocks

Collaboration diagram for Projection building blocks:

Modules
	Symmetries building blocks

Files
file	BackProjectorByBin.h
	Declares class stir::BackProjectorByBin.
file	BackProjectorByBinUsingInterpolation.h
	Declares class stir::BackProjectorByBinUsingInterpolation.
file	ForwardProjectorByBin.h
	Base class for forward projectors which work on 'large' collections of bins: given the whole image, fill in a stir::RelatedViewgrams<float> object.
file	ForwardProjectorByBinUsingProjMatrixByBin.h
	definition of stir::ForwardProjectorByBinUsingProjMatrixByBin
file	ForwardProjectorByBinUsingRayTracing.h
	Declaration of class stir::ForwardProjectorByBinUsingRayTracing.
file	BackProjectorByBinNiftyPET.h
	Back projection class using NiftyPET's GPU implementation.
file	ForwardProjectorByBinNiftyPET.h
	Forward projection class using NiftyPET's GPU implementation.
file	NiftyPETHelper.h
	Helper class for NiftyPET's GPU implementation.
file	ProjectorByBinPairUsingNiftyPET.h
	Declares class stir::ProjectorByBinPairUsingNiftyPET.
file	ProjectorByBinPair.h
	Declares class stir::ProjectorByBinPair.
file	ProjectorByBinPairUsingProjMatrixByBin.h
	Declares class stir::ProjectorByBinPairUsingProjMatrixByBin.
file	ProjectorByBinPairUsingSeparateProjectors.h
	Declares class stir::ProjectorByBinPairUsingSeparateProjectors.
file	ProjMatrixByBin.h
	declaration of stir::ProjMatrixByBin and its helpers classes
file	ProjMatrixByBin.inl
	Implementations of inline functions for class stir::ProjMatrixByBin.
file	ProjMatrixByBinFromFile.h
	stir::ProjMatrixByBinFromFile's definition
file	ProjMatrixByBinPinholeSPECTUB.h
	stir::ProjMatrixByBinPinholeSPECTUB's definition
file	ProjMatrixByBinSPECTUB.h
	stir::ProjMatrixByBinSPECTUB's definition
file	ProjMatrixByBinUsingInterpolation.h
	stir::ProjMatrixByBinUsingInterpolation's definition
file	ProjMatrixByBinUsingRayTracing.h
	stir::ProjMatrixByBinUsingRayTracing's definition
file	ProjMatrixElemsForOneBin.h
	Declaration of class stir::ProjMatrixElemsForOneBin.
file	ProjMatrixElemsForOneBin.inl
	Inline implementations for class stir::ProjMatrixelemesForOneBin.
file	ProjMatrixElemsForOneBinValue.h
	Declaration of class stir::ProjMatrixElemsForOneBinValue.
file	ProjMatrixElemsForOneBinValue.inl
	Inline implementations for class stir::ProjMatrixElemsForOneBinValue.
file	ProjMatrixElemsForOneDensel.inl
	Inline implementations for class stir::ProjMatrixElemsForOneDensel.
file	ProjMatrixElemsForOneDenselValue.h
	Declaration of class stir::ProjMatrixElemsForOneDenselValue.
file	ProjMatrixElemsForOneDenselValue.inl
	Inline implementations for class stir::ProjMatrixElemsForOneDenselValue.
file	BackProjectorByBin.cxx
	non-inline implementations for stir::BackProjectorByBin
file	BackProjectorByBinUsingInterpolation.cxx
	non-inline implementations for BackProjectorByBinUsingInterpolation
file	BackProjectorByBinUsingInterpolation_3DCho.cxx
	This file defines two private static functions from stir::BackProjectorByBinUsingInterpolation.
file	BackProjectorByBinUsingInterpolation_linear.cxx
	This file defines two private static functions from stir::BackProjectorByBinUsingInterpolation, for the case of piecewise linear interpolation.
file	BackProjectorByBinUsingInterpolation_piecewise_linear.cxx
	This file defines two private static functions from stir::BackProjectorByBinUsingInterpolation, for the case of piecewise linear interpolation.
file	BackProjectorByBinUsingProjMatrixByBin.cxx
	non-inline implementations for stir::BackProjectorByBinUsingProjMatrixByBin
file	ForwardProjectorByBin.cxx
	non-inline implementations for stir::ForwardProjectorByBin
file	ForwardProjectorByBinUsingProjMatrixByBin.cxx
	implementations for stir::ForwardProjectorByBinUsingProjMatrixByBin
file	ForwardProjectorByBinUsingRayTracing.cxx
	Implementations of non-static methods of stir::ForwardProjectorByBinUsingRayTracing.
file	ForwardProjectorByBinUsingRayTracing_Siddon.cxx
	implementation of Siddon's algorithm
file	BackProjectorByBinNiftyPET.cxx
	non-inline implementations for stir::BackProjectorByBinNiftyPET
file	ForwardProjectorByBinNiftyPET.cxx
	non-inline implementations for stir::ForwardProjectorByBinNiftyPET
file	NiftyPETHelper.cxx
	non-inline implementations for stir::NiftyPETHelper
file	ProjectorByBinPairUsingNiftyPET.cxx
	non-inline implementations for stir::ProjectorByBinPairUsingNiftyPET
file	ProjectorByBinPair.cxx
	non-inline implementations for stir::ProjectorByBinPair
file	ProjectorByBinPairUsingProjMatrixByBin.cxx
	non-inline implementations for stir::ProjectorByBinPairUsingProjMatrixByBin
file	ProjectorByBinPairUsingSeparateProjectors.cxx
	non-inline implementations for stir::ProjectorByBinPairUsingSeparateProjectors
file	ProjMatrixByBin.cxx
	implementation of the stir::ProjMatrixByBin class
file	ProjMatrixByBinFromFile.cxx
	Implementation of class stir::ProjMatrixByBinFromFile.
file	ProjMatrixByBinPinholeSPECTUB.cxx
	Implementation of class stir::ProjMatrixByBinPinholeSPECTUB.
file	ProjMatrixByBinSPECTUB.cxx
	Implementation of class stir::ProjMatrixByBinSPECTUB.
file	ProjMatrixByBinUsingInterpolation.cxx
	non-inline implementations for stir::ProjMatrixByBinUsingInterpolation
file	ProjMatrixByBinUsingRayTracing.cxx
	non-inline implementations for stir::ProjMatrixByBinUsingRayTracing
file	ProjMatrixElemsForOneBin.cxx
	non-inline implementations for stir::ProjMatrixElemsForOneBin
file	ProjMatrixElemsForOneDensel.cxx
	non-inline implementations for stir::ProjMatrixElemsForOneDensel

Classes
class	stir::BackProjectorByBin
	Abstract base class for all back projectors. More...
class	stir::BackProjectorByBinUsingInterpolation
	does backprojection by interpolating between the bins. More...
class	stir::ForwardProjectorByBin
	Abstract base class for all forward projectors. More...
class	stir::ForwardProjectorByBinUsingProjMatrixByBin
	This implements the ForwardProjectorByBin interface, given any ProjMatrixByBin objectIt stores a shared_ptr to a ProjMatrixByBin object, which will be used to get the relevant elements of the projection matrix. More...
class	stir::ForwardProjectorByBinUsingRayTracing
	This class implements forward projection using Siddon's algorithm for ray tracing. That is, it computes length of intersection with the voxels. More...
class	stir::BackProjectorByBinNiftyPET
	Class for NiftyPET's GPU back projector. More...
class	stir::ForwardProjectorByBinNiftyPET
	Class for NiftyPET's GPU forward projector. More...
class	stir::NiftyPETHelper
	Helper class for the wrapped NiftyPET projectors. More...
class	stir::ProjectorByBinPairUsingNiftyPET
	A projector pair based on NiftyPET projectors. More...
class	stir::detail::ParallelprojHelper
	Helper class for Parallelproj's projectors. More...
class	stir::ProjectorByBinPair
	Abstract base class for all projector pairs. More...
class	stir::ProjectorByBinPairUsingProjMatrixByBin
	A projector pair based on a single matrix. More...
class	stir::ProjectorByBinPairUsingSeparateProjectors
	A projector pair based on a single matrix. More...
class	stir::ProjMatrixByBin
	This is the (abstract) base class for all projection matrices which are organised by 'bin'. More...
class	stir::ProjMatrixByBinFromFile
	Reads/writes a projection matrix from/to file. More...
class	stir::ProjMatrixByBinPinholeSPECTUB
	Generates projection matrix for pinhole SPECT studies. More...
class	stir::ProjMatrixByBinSPECTUB
	generates projection matrix for SPECT studies More...
class	stir::ProjMatrixByBinUsingInterpolation
	Computes projection matrix elements for VoxelsOnCartesianGrid images by using an interpolation model. More...
class	stir::ProjMatrixByBinUsingRayTracing
	Computes projection matrix elements for VoxelsOnCartesianGrid images by using a Length of Intersection (LOI) model. More...
class	stir::ProjMatrixElemsForOneBinValue
	Stores voxel coordinates and the value of the matrix element. More...
class	stir::ProjMatrixElemsForOneDensel
	This stores the non-zero projection matrix elements for every 'voxel'. More...
class	stir::ProjMatrixElemsForOneDenselValue
	Stores voxel coordinates and the value of the matrix element. More...

Detailed Description

Everything (?) related to projection matrices, forward and back projection.

In the context of image reconstruction, 'forward projection' means going from the image to an estimate of the (mean of the) data. This is because in SPECT and PET, the measurements can be seen to be approximations of line integrals through the object.

STIR keeps this terminology, even though it is unfortunate. (For instance, a stir::ProjMatrix is not a projection matrix in the mathematical sense.)