Computes projection matrix elements for VoxelsOnCartesianGrid images by using an interpolation model. More...

#include "stir/recon_buildblock/ProjMatrixByBinUsingInterpolation.h"

Inheritance diagram for stir::ProjMatrixByBinUsingInterpolation:

[legend]

Public Member Functions
	ProjMatrixByBinUsingInterpolation ()
	Default constructor (calls set_defaults())

void	set_up (const shared_ptr< const ProjDataInfo > &proj_data_info_ptr, const shared_ptr< const DiscretisedDensity< 3, float >> &density_info_ptr) override
	Stores all necessary geometric info. More...

ProjMatrixByBinUsingInterpolation *	clone () const override

Public Member Functions inherited from stir::RegisteredParsingObject< ProjMatrixByBinUsingInterpolation, ProjMatrixByBin, ProjMatrixByBin >
std::string	get_registered_name () const override
	Returns Derived::registered_name.

std::string	parameter_info () override
	Returns a string with all parameters and their values, in a form suitable for parsing again.

Public Member Functions inherited from stir::ProjMatrixByBin
const DataSymmetriesForBins *	get_symmetries_ptr () const
	get a pointer to an object encoding all symmetries that are used by this ProjMatrixByBin

const shared_ptr< DataSymmetriesForBins >	get_symmetries_sptr () const
	get a shared_ptr to an object encoding all symmetries that are used by this ProjMatrixByBin

void	get_proj_matrix_elems_for_one_bin (ProjMatrixElemsForOneBin &, const Bin &) const
	The main method for getting a row of the matrix. More...

void	enable_cache (const bool v=true)

void	store_only_basic_bins_in_cache (const bool v=true)

bool	is_cache_enabled () const

bool	does_cache_store_only_basic_bins () const

void	clear_cache () const
	Remove all elements from the cache.

Public Member Functions inherited from stir::ParsingObject
	ParsingObject (const ParsingObject &)

ParsingObject &	operator= (const ParsingObject &)

void	ask_parameters ()

bool	parse (std::istream &f)

bool	parse (const char *const filename)

Public Member Functions inherited from stir::TimedObject
void	reset_timers ()
	reset all timers kept by this object

void	stop_timers () const
	stop all timers kept by this object More...

void	start_timers (bool do_reset=false) const
	start all timers kept by this object More...

double	get_CPU_timer_value () const
	get current value of the CPU timer (since first use or last reset)

double	get_wall_clock_timer_value () const
	get current value of the wall-clock timer (since first use or last reset)

Static Public Attributes
static const char *const	registered_name = "Interpolation"
	Name which will be used when parsing a ProjMatrixByBin object.

Additional Inherited Members
Static Public Member Functions inherited from stir::RegisteredParsingObject< ProjMatrixByBinUsingInterpolation, ProjMatrixByBin, ProjMatrixByBin >
static ProjMatrixByBin *	read_from_stream (std::istream *)
	Construct a new object (of type Derived) by parsing the istream. More...

Static Public Member Functions inherited from stir::RegisteredObject< ProjMatrixByBin >
static ProjMatrixByBin *	read_registered_object (std::istream *in, const std::string &registered_name)
	Construct a new object (of a type derived from Root, its actual type determined by the registered_name parameter) by parsing the istream. More...

static ProjMatrixByBin *	ask_type_and_parameters ()
	ask the user for the type, and then calls read_registered_object(0, type) More...

static void	list_registered_names (std::ostream &stream)
	List all possible registered names to the stream. More...

Protected Types inherited from stir::RegisteredObject< ProjMatrixByBin >
typedef ProjMatrixByBin (	RootFactory) (std::istream *)
	The type of a root factory is a function, taking an istream* as argument, and returning a Root*.

typedef FactoryRegistry< std::string, RootFactory, interfile_less >	RegistryType
	The type of the registry.

Protected Member Functions inherited from stir::ProjMatrixByBin
	ProjMatrixByBin ()
	default ctor (calls set_defaults()) More...

Succeeded	get_cached_proj_matrix_elems_for_one_bin (ProjMatrixElemsForOneBin &) const
	The method that tries to get data from the cache. More...

void	cache_proj_matrix_elems_for_one_bin (const ProjMatrixElemsForOneBin &) const
	The method to store data in the cache.

Protected Member Functions inherited from stir::ParsingObject
virtual void	set_key_values ()
	This will be called before parsing or parameter_info is called. More...

Static Protected Member Functions inherited from stir::RegisteredObject< ProjMatrixByBin >
static RegistryType &	registry ()
	Static function returning the registry. More...

Protected Attributes inherited from stir::ProjMatrixByBin
shared_ptr< DataSymmetriesForBins >	symmetries_sptr

bool	cache_disabled

bool	cache_stores_only_basic_bins

bool	tof_enabled
	If activated TOF reconstruction will be performed.

shared_ptr< const VoxelsOnCartesianGrid< float > >	image_info_sptr
	We need a local copy of the discretised density in order to find the cartesian coordinates of each voxel.

shared_ptr< const ProjDataInfo >	proj_data_info_sptr
	We need a local copy of the proj_data_info to get the integration boundaries and RayTracing.

Protected Attributes inherited from stir::ParsingObject
KeyParser	parser

Detailed Description

Computes projection matrix elements for VoxelsOnCartesianGrid images by using an interpolation model.

This class implements a projection model that interpolates in projection space. When used for back-projection, it should give the same results as BackProjectorByByUsingInterpolation, but is probably much slower.

The current implementation uses some quite generic code to handle symmetries, but is very very slow to compute the elements. Once they are cached, performance is as usual of course.

Warning: Preliminary code, not tested to usual STIR standards.

Member Function Documentation

◆ set_up()

void stir::ProjMatrixByBinUsingInterpolation::set_up	(	const shared_ptr< const ProjDataInfo > &	proj_data_info_ptr,
		const shared_ptr< const DiscretisedDensity< 3, float >> &	density_info_ptr
	)

overridevirtual

Stores all necessary geometric info.

Note that the density_info_ptr is not stored in this object. It's only used to get some info on sizes etc.

Implements stir::ProjMatrixByBin.

References stir::error(), stir::VectorWithOffset< T >::get_max_index(), stir::VectorWithOffset< T >::get_min_index(), stir::DiscretisedDensity< num_dimensions, elemT >::get_origin(), stir::VoxelsOnCartesianGrid< elemT >::get_voxel_size(), stir::ProjMatrixByBin::set_up(), and stir::warning().

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

/home/sirfuser/devel/STIRdistrib/STIR/src/include/stir/recon_buildblock/ProjMatrixByBinUsingInterpolation.h
/home/sirfuser/devel/STIRdistrib/STIR/src/recon_buildblock/ProjMatrixByBinUsingInterpolation.cxx

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ set_up()