Class for Parallelproj's back projector. More...

#include "stir/recon_buildblock/Parallelproj_projector/BackProjectorByBinParallelproj.h"

Inheritance diagram for stir::BackProjectorByBinParallelproj:

[legend]

Public Member Functions
	BackProjectorByBinParallelproj ()
	Default constructor calls reset_timers()

void	initialise_keymap () override
	Keymap.

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

const DataSymmetriesForViewSegmentNumbers *	get_symmetries_used () const override
	Symmetries not used, so returns TrivialDataSymmetriesForBins.

void	get_output (DiscretisedDensity< 3, float > &) const override
	Get output.

void	start_accumulating_in_new_target () override
	tell the back projector to start accumulating into a new target. This function has to be called before any back-projection is initiated.

void	set_defaults () override
	set defaults

void	set_verbosity (const bool verbosity)
	Set verbosity.

void	set_num_gpu_chunks (int num_gpu_chunks)

int	get_num_gpu_chunks ()

BackProjectorByBinParallelproj *	clone () const override

Public Member Functions inherited from stir::RegisteredParsingObject< BackProjectorByBinParallelproj, BackProjectorByBin >
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::BackProjectorByBin
	BackProjectorByBin ()
	Default constructor calls reset_timers()

void	back_project (DiscretisedDensity< 3, float > &, const ProjData &, int subset_num=0, int num_subsets=1)
	project whole proj_data into the volume More...

virtual void	back_project (const ProjData &, int subset_num=0, int num_subsets=1)
	projects the viewgrams into the volume it adds to the data backprojected since start_accumulating_in_new_target() was last called.

void	back_project (const RelatedViewgrams< float > &)
	projects the viewgrams into the volume it adds to the data backprojected since start_accumulating_in_new_target() was last called.

void	back_project (const RelatedViewgrams< float > &, const int min_axial_pos_num, const int max_axial_pos_num)
	projects the specified range of the viewgrams and axial positions into the volume it adds to the data backprojected since start_accumulating_in_new_target() was last called.

void	back_project (const RelatedViewgrams< float > &, const int min_axial_pos_num, const int max_axial_pos_num, const int min_tangential_pos_num, const int max_tangential_pos_num)
	projects the specified range of the viewgrams, axial positions and tangential positions into the volume it adds to the data backprojected since start_accumulating_in_new_target() was last called.

void	set_post_data_processor (shared_ptr< DataProcessor< DiscretisedDensity< 3, float >>> post_data_processor_sptr)
	Set data processor to use after back projection.

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)

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)

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

Protected Member Functions
void	actual_back_project (const RelatedViewgrams< float > &, const int min_axial_pos_num, const int max_axial_pos_num, const int min_tangential_pos_num, const int max_tangential_pos_num) override
	This actually does the back projection. There are two versions of this code to enable backwards compatibility. More...

Protected Member Functions inherited from stir::BackProjectorByBin
virtual void	actual_back_project (DiscretisedDensity< 3, float > &, const RelatedViewgrams< float > &, const int min_axial_pos_num, const int max_axial_pos_num, const int min_tangential_pos_num, const int max_tangential_pos_num)
	This actually does the back projection. There are two versions of this code to enable backwards compatibility. More...

virtual void	check (const ProjDataInfo &proj_data_info) const
	check if the argument is the same as what was used for set_up() More...

virtual void	check (const ProjDataInfo &proj_data_info, const DiscretisedDensity< 3, float > &density_info) const
	check if the arguments are the same as what was used for set_up() More...

Protected Member Functions inherited from stir::ParsingObject
virtual bool	post_processing ()
	This will be called at the end of the parsing. More...

virtual void	set_key_values ()
	This will be called before parsing or parameter_info is called. More...

Friends
class	ProjectorByBinPairUsingParallelproj

Additional Inherited Members
Static Public Member Functions inherited from stir::RegisteredParsingObject< BackProjectorByBinParallelproj, BackProjectorByBin >
static BackProjectorByBin *	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< BackProjectorByBin >
static BackProjectorByBin *	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 BackProjectorByBin *	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< BackProjectorByBin >
typedef BackProjectorByBin (	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.

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

Protected Attributes inherited from stir::BackProjectorByBin
bool	_already_set_up

shared_ptr< DiscretisedDensity< 3, float > >	_density_sptr
	Clone of the density sptr set with set_up()

shared_ptr< DataProcessor< DiscretisedDensity< 3, float > > >	_post_data_processor_sptr

shared_ptr< const ProjDataInfo >	_proj_data_info_sptr
	ProjDataInfo set by set_up()

Protected Attributes inherited from stir::ParsingObject
KeyParser	parser

Detailed Description

Class for Parallelproj's back projector.

Member Function Documentation

◆ set_up()

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

overridevirtual

Stores all necessary geometric info.

If necessary, set_up() can be called more than once.

Implements stir::BackProjectorByBin.

References stir::BackProjectorByBin::_density_sptr, stir::BackProjectorByBin::check(), and stir::BackProjectorByBin::set_up().

◆ actual_back_project()

void stir::BackProjectorByBinParallelproj::actual_back_project	(	const RelatedViewgrams< float > &	viewgrams,
		const int	min_axial_pos_num,
		const int	max_axial_pos_num,
		const int	min_tangential_pos_num,
		const int	max_tangential_pos_num
	)

overrideprotectedvirtual

This actually does the back projection. There are two versions of this code to enable backwards compatibility.

This is the newer version (in which the backprojected image is a member variable). In most cases, the new version calls the old version (in which the backprojected image is not a member variable).

If you are developing your own projector, one of these two needs to be overloaded. It doesn't matter which, but it might as well be the new one in case we one day decide to remove the old ones.

Reimplemented from stir::BackProjectorByBin.

References stir::BackProjectorByBin::_proj_data_info_sptr, stir::error(), and stir::RelatedViewgrams< elemT >::get_basic_segment_num().

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

/home/sirfuser/devel/STIRdistrib/STIR/src/include/stir/recon_buildblock/Parallelproj_projector/BackProjectorByBinParallelproj.h
/home/sirfuser/devel/STIRdistrib/STIR/src/recon_buildblock/Parallelproj_projector/BackProjectorByBinParallelproj.cxx
/home/sirfuser/devel/STIRdistrib/STIR/src/recon_buildblock/Parallelproj_projector/ProjectorByBinPairUsingParallelproj.cxx

Public Member Functions

Static Public Attributes

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ set_up()

◆ actual_back_project()