#include <rtkProjectionsRegionConstIteratorRayBased.h>

Inheritance diagram for rtk::ProjectionsRegionConstIteratorRayBased< TImage >:

Collaboration diagram for rtk::ProjectionsRegionConstIteratorRayBased< TImage >:

Public Types
using	HomogeneousMatrixType = itk::Matrix< double, 4, 4 >

using	IndexValueType = typename Superclass::IndexValueType

using	MatrixType = itk::Matrix< double, 3, 4 >

using	OffsetValueType = typename Superclass::OffsetValueType

using	PointType = typename itk::Vector< double, 3 >

using	RegionType = typename Superclass::RegionType

using	Self = ProjectionsRegionConstIteratorRayBased

using	Superclass = itk::ImageConstIteratorWithIndex< TImage >

Public Member Functions
const PointType	GetDirection ()

void	Next ()

Self &	operator++ ()

	ProjectionsRegionConstIteratorRayBased (const TImage ptr, const RegionType &region, const ThreeDCircularProjectionGeometry geometry, const MatrixType &postMat)


const PointType &	GetSourcePosition ()

const PointType &	GetPixelPosition ()

const PointType &	GetSourceToPixel ()

Static Public Member Functions
static Self *	New (const TImage ptr, const RegionType &region, const ThreeDCircularProjectionGeometry geometry, const MatrixType &postMat)

static Self *	New (const TImage ptr, const RegionType &region, const ThreeDCircularProjectionGeometry geometry, const HomogeneousMatrixType &postMat)

static Self *	New (const TImage ptr, const RegionType &region, const ThreeDCircularProjectionGeometry geometry)

Protected Member Functions
virtual void	NewPixel ()=0

virtual void	NewProjection ()=0

Protected Attributes
ThreeDCircularProjectionGeometry::ConstPointer	m_Geometry

PointType	m_PixelPosition

MatrixType	m_PostMultiplyMatrix

PointType	m_SourcePosition

PointType	m_SourceToPixel

Detailed Description

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

Iterate over a projection stack with corresponding ray information.

Base class for iterating over the pixels of projection images with the and having at the same time the geometry information for the corresponding source to pixel ray, defined by a 3D source position and a 3D pixel position. The iterator provides this information in mm, unless a 3D matrix is provided to convert the mm value of the coordinates of the two points to some other coordinate system. A typical example is the mm to voxel matrix to work in voxel coordinates. The iterator only works with the ThreeDCircularProjectionGeometry is purely virtual because this geometry can handle parallel geometry with flat panels and cone-beam geometries with flat and curved detectors.

Author: Simon Rit

Definition at line 54 of file rtkProjectionsRegionConstIteratorRayBased.h.

Member Typedef Documentation

◆ HomogeneousMatrixType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::HomogeneousMatrixType = itk::Matrix<double, 4, 4>

Definition at line 73 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ IndexValueType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::IndexValueType = typename Superclass::IndexValueType

Definition at line 70 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ MatrixType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::MatrixType = itk::Matrix<double, 3, 4>

Definition at line 72 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ OffsetValueType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::OffsetValueType = typename Superclass::OffsetValueType

Index type alias support While these were already typdef'ed in the superclass they need to be redone here for this subclass to compile properly with gcc.Types inherited from the Superclass

Definition at line 67 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ PointType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::PointType = typename itk::Vector<double, 3>

Definition at line 69 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ RegionType

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::RegionType = typename Superclass::RegionType

Definition at line 68 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ Self

template<typename TImage >

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

Standard class type alias.

Definition at line 58 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ Superclass

template<typename TImage >

using rtk::ProjectionsRegionConstIteratorRayBased< TImage >::Superclass = itk::ImageConstIteratorWithIndex<TImage>

Definition at line 59 of file rtkProjectionsRegionConstIteratorRayBased.h.

Constructor & Destructor Documentation

◆ ProjectionsRegionConstIteratorRayBased()

template<typename TImage >

rtk::ProjectionsRegionConstIteratorRayBased< TImage >::ProjectionsRegionConstIteratorRayBased	(	const TImage *	ptr,
		const RegionType &	region,
		const ThreeDCircularProjectionGeometry *	geometry,
		const MatrixType &	postMat
	)

Constructor establishes an iterator to walk a particular image and a particular region of that image. Set the matrix by which the 3D coordinates of the projection can be multiplied. A typical example is the conversion from 3D physical coordinates to voxel indices in an itk Image.

Member Function Documentation

◆ GetDirection()

template<typename TImage >

const PointType rtk::ProjectionsRegionConstIteratorRayBased< TImage >::GetDirection ( )

inline

Computes and returns a unit vector pointing from the source to the current pixel, i.e., GetSourceToPixel()/||GetSourceToPixel()||.

Definition at line 144 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ GetPixelPosition()

template<typename TImage >

const PointType& rtk::ProjectionsRegionConstIteratorRayBased< TImage >::GetPixelPosition ( )

inline

Get ray information. A ray is described by the 3D coordinates of two points, the (current) SourcePosition and the (current) PixelPosition in the projection stack. The difference, SourceToPixel, is also computed and stored for every ray.

Definition at line 130 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ GetSourcePosition()

template<typename TImage >

const PointType& rtk::ProjectionsRegionConstIteratorRayBased< TImage >::GetSourcePosition ( )

inline

Get ray information. A ray is described by the 3D coordinates of two points, the (current) SourcePosition and the (current) PixelPosition in the projection stack. The difference, SourceToPixel, is also computed and stored for every ray.

Definition at line 125 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ GetSourceToPixel()

template<typename TImage >

const PointType& rtk::ProjectionsRegionConstIteratorRayBased< TImage >::GetSourceToPixel ( )

inline

Get ray information. A ray is described by the 3D coordinates of two points, the (current) SourcePosition and the (current) PixelPosition in the projection stack. The difference, SourceToPixel, is also computed and stored for every ray.

Definition at line 135 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ New() [1/3]

template<typename TImage >

static Self* rtk::ProjectionsRegionConstIteratorRayBased< TImage >::New	(	const TImage *	ptr,
		const RegionType &	region,
		const ThreeDCircularProjectionGeometry *	geometry,
		const MatrixType &	postMat
	)

static

◆ New() [2/3]

template<typename TImage >

static Self* rtk::ProjectionsRegionConstIteratorRayBased< TImage >::New	(	const TImage *	ptr,
		const RegionType &	region,
		const ThreeDCircularProjectionGeometry *	geometry,
		const HomogeneousMatrixType &	postMat
	)

static

◆ New() [3/3]

template<typename TImage >

static Self* rtk::ProjectionsRegionConstIteratorRayBased< TImage >::New	(	const TImage *	ptr,
		const RegionType &	region,
		const ThreeDCircularProjectionGeometry *	geometry
	)

static

◆ NewPixel()

template<typename TImage >

virtual void rtk::ProjectionsRegionConstIteratorRayBased< TImage >::NewPixel ( )

protectedpure virtual

Init a new pixel position in a 2D projection, assuming that the NewProjection method has already been called.

Implemented in rtk::ProjectionsRegionConstIteratorRayBasedWithCylindricalPanel< TImage >, rtk::ProjectionsRegionConstIteratorRayBasedParallel< TImage >, and rtk::ProjectionsRegionConstIteratorRayBasedWithFlatPanel< TImage >.

◆ NewProjection()

template<typename TImage >

virtual void rtk::ProjectionsRegionConstIteratorRayBased< TImage >::NewProjection ( )

protectedpure virtual

Init the parameters common to a new 2D projection in the 3D stack.

Implemented in rtk::ProjectionsRegionConstIteratorRayBasedWithCylindricalPanel< TImage >, rtk::ProjectionsRegionConstIteratorRayBasedParallel< TImage >, and rtk::ProjectionsRegionConstIteratorRayBasedWithFlatPanel< TImage >.

◆ Next()

template<typename TImage >

void rtk::ProjectionsRegionConstIteratorRayBased< TImage >::Next ( )

inline

Go to the next pixel by simply calling the ++ operator. Should not be the ++ operator should be. The function is provided for cosmetic reasons, because pointers to these iterators will be used more than the iterator itself.

Definition at line 115 of file rtkProjectionsRegionConstIteratorRayBased.h.

◆ operator++()

template<typename TImage >

Self& rtk::ProjectionsRegionConstIteratorRayBased< TImage >::operator++ ( )

Increment (prefix) the fastest moving dimension of the iterator's index. This operator will constrain the iterator within the region (i.e. the iterator will automatically wrap from the end of the row of the region to the beginning of the next row of the region) up until the iterator tries to moves past the last pixel of the region. Here, the iterator will be set to be one pixel past the end of the region.