Symmetries building blocks

Collaboration diagram for Symmetries building blocks:

Files
file	DataSymmetriesForBins.h
	Declaration of class stir::DataSymmetriesForBins.
file	DataSymmetriesForBins_PET_CartesianGrid.h
	Declaration of class stir::DataSymmetriesForBins_PET_CartesianGrid.
file	DataSymmetriesForBins_PET_CartesianGrid.inl
	inline implementations for class stir::DataSymmetriesForBins_PET_CartesianGrid
file	DataSymmetriesForDensels.h
	Declaration of class stir::DataSymmetriesForDensels.
file	RelatedDensels.h
	Declaration of class stir::RelatedDensels.
file	RelatedDensels.inl
	Implementations of inline functions of class stir::RelatedDensels.
file	SymmetryOperation.h
	Declaration of 2 classes: stir::SymmetryOperation and stir::TrivialSymmetryOperation.
file	SymmetryOperations_PET_CartesianGrid.h
	Declaration of all symmetry classes for PET (cylindrical) scanners and cartesian images.
file	SymmetryOperations_PET_CartesianGrid.inl
	Implementation of all symmetry classes for PET scanners and cartesian images.
file	TrivialDataSymmetriesForBins.h
	Declaration of class stir::TrivialDataSymmetriesForBins.
file	DataSymmetriesForBins.cxx
	implementations for class stir::DataSymmetriesForBins
file	DataSymmetriesForBins_PET_CartesianGrid.cxx
	non-inline implementations for class stir::DataSymmetriesForBins_PET_CartesianGrid
file	DataSymmetriesForDensels.cxx
	implementations for class stir::DataSymmetriesForDensels
file	SymmetryOperation.cxx
	Implementations of non-inline functions for class SymmetryOperation.
file	SymmetryOperations_PET_CartesianGrid.cxx
	non-inline implementations for all symmetry operations for PET scanners and Cartesian grid images
file	TrivialDataSymmetriesForBins.cxx
	non-inline implementations for class stir::TrivialDataSymmetriesForBins

Classes
class	stir::DataSymmetriesForBins
	A class for encoding/finding symmetries common to the geometry of the projection data and the discretised density. More...
class	stir::DataSymmetriesForBins_PET_CartesianGrid
	Symmetries appropriate for a (cylindrical) PET scanner, and a discretised density on a Cartesian grid. More...
class	stir::DataSymmetriesForDensels
	A class for encoding/finding symmetries common to the geometry of the projection data and the discretised density. More...
class	stir::RelatedDensels
	This class contains all information about a set of densels related by symmetry. More...
class	stir::TrivialSymmetryOperation
	A class implementing the trivial case where the symmetry operation does nothing at all. More...
class	stir::TrivialDataSymmetriesForBins
	A class derived from DataSymmetriesForBins that says that there are no symmetries at all. More...

Detailed Description

Usually, there are (geometric) symmetries between the image and the projection data. This means that various elements of the projection matrix will be equal. The classes in this module convert this concept into code, such that projection matrices need only be computed for the 'independent' bins.