#include <itkMultiResolutionPyramidImageFilter.h>

Inheritance diagram for itk::MultiResolutionPyramidImageFilter< TInputImage, TOutputImage >:

Collaboration diagram for itk::MultiResolutionPyramidImageFilter< TInputImage, TOutputImage >:

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef Superclass::InputImageConstPointer	InputImageConstPointer
typedef Superclass::InputImagePointer	InputImagePointer
typedef Superclass::InputImageType	InputImageType
typedef Superclass::OutputImagePointer	OutputImagePointer
typedef Superclass::OutputImageType	OutputImageType
typedef SmartPointer< Self >	Pointer
typedef Array2D< unsigned int >	ScheduleType
typedef MultiResolutionPyramidImageFilter	Self
typedef ImageToImageFilter < TInputImage, TOutputImage >	Superclass
Public Member Functions
virtual ::itk::LightObject::Pointer	CreateAnother (void) const
virtual void	GenerateInputRequestedRegion ()
virtual void	GenerateOutputInformation ()
virtual const double &	GetMaximumError ()
virtual const char *	GetNameOfClass () const
virtual unsigned int	GetNumberOfLevels () const
virtual const ScheduleType &	GetSchedule ()
const unsigned int *	GetStartingShrinkFactors () const
virtual bool	GetUseShrinkImageFilter () const
virtual void	SetMaximumError (double _arg)
virtual void	SetNumberOfLevels (unsigned int num)
virtual void	SetSchedule (const ScheduleType &schedule)
virtual void	SetStartingShrinkFactors (unsigned int factor)
virtual void	SetStartingShrinkFactors (unsigned int *factors)
virtual void	SetUseShrinkImageFilter (bool _arg)
	typedef (Concept::SameDimension< ImageDimension, OutputImageDimension >) SameDimensionCheck
	typedef (Concept::HasNumericTraits< typename TOutputImage::PixelType >) OutputHasNumericTraitsCheck
virtual void	UseShrinkImageFilterOff ()
virtual void	UseShrinkImageFilterOn ()

virtual void	GenerateOutputRequestedRegion (DataObject *output)
Static Public Member Functions
static bool	IsScheduleDownwardDivisible (const ScheduleType &schedule)
static Pointer	New ()
Static Public Attributes

static const unsigned int	ImageDimension = TInputImage::ImageDimension
static const unsigned int	OutputImageDimension = TOutputImage::ImageDimension
Protected Member Functions
void	GenerateData ()

	MultiResolutionPyramidImageFilter ()
	~MultiResolutionPyramidImageFilter ()
void	PrintSelf (std::ostream &os, Indent indent) const
Protected Attributes
double	m_MaximumError
unsigned int	m_NumberOfLevels
ScheduleType	m_Schedule
bool	m_UseShrinkImageFilter
Private Member Functions
	MultiResolutionPyramidImageFilter (const Self &)
void	operator= (const Self &)

Detailed Description

template<class TInputImage, class TOutputImage>
class itk::MultiResolutionPyramidImageFilter< TInputImage, TOutputImage >

Framework for creating images in a multi-resolution pyramid.

MultiResolutionPyramidImageFilter provides a generic framework to to create a image pryamid according to a user defined multi-resolution schedule.

The multi-resolution schedule is specified in terms for shrink factors at each multi-resolution level for each dimension.

A user can either use the default schedules or specify each factor in the schedules directly.

The schedule is stored as an unsigned int matrix. An element of the table can be access via the double bracket notation: table[resLevel][dimension]

For example: 8 4 4 4 4 2

is a schedule for two computation level. In the first (coarest) level the image is reduce by a factor of 8 in the column dimension, factor of 4 in the row dimension and factor of 4 in the slice dimension. In the second level, the image is reduce by a factor of 4 in the column dimension, 4 is the row dimension and 2 in the slice dimension.

The method SetNumberOfLevels() set the number of computation levels in the pyramid. This method will allocate memory for the multi-resolution schedule table. This method generates defaults tables with the starting shrink factor for all dimension set to 2^(NumberOfLevel - 1). All factors are halved for all subsequent levels. For example if the number of levels was set to 4, the default table is:

8 8 8 4 4 4 2 2 2 1 1 1

The user can get a copy of the schedule via GetSchedule() They may make alteration and reset it using SetSchedule().

A user can create a default table by specifying the starting shrink factors via methods SetStartingShrinkFactors() The factors for subsequent level is generated by halving the factor or setting to one, depending on which is larger.

For example, for 4 levels and starting factors of 8,8,4 the default table would be:

8 8 4 4 4 2 2 2 1 1 1 1

When this filter is updated, NumberOfLevels outputs are produced. The N'th output correspond to the N'th level of the pyramid.

To generate each output image, Gaussian smoothing is first performed using a DiscreteGaussianImageFilter with variance (shrink factor / 2)^2. The smoothed image is then downsampled using a ResampleImageFilter.

Note that even if the shrink factors are all equal to one, a smoothing will still be applied. The output at the finest level of the pyramid will thus typically be a smoothed version of the input.

This class is templated over the input image type and the output image type.

This filter uses multithreaded filters to perform the smoothing and downsampling.

This filter supports streaming.

See also:: DiscreteGaussianImageFilter; ShrinkImageFilter

Definition at line 112 of file itkMultiResolutionPyramidImageFilter.h.