parent class to compute wavelet decomposition / reconstruction For the moment just a fast Haar wavelet is available. Fast in the sense that the downsampling and upsampling are directly integrated in the computations and that no unnecessary coefficients are computed that are removed by the subsampling More...

#include <Wavelet.h>

Inheritance diagram for stira::wavelet::Wavelet:

Public Member Functions
	Wavelet ()
	constructor

virtual	~Wavelet ()
	destructor

virtual bool	Decompose (ArrayGrid< double > *pSourceGrid, int nrScales)=0
	decomposition More...

Pyramid< double > *	GetPyramid ()
	Gets the pyramid with all the subbands.

virtual bool	Reconstruct (double threshold=0.0)=0
	reconstructs the decomposed image More...

ArrayGrid< double > *	GetCopyOfReconstructedGrid ()
	gets a copy of the grid after wavelket reconstruction Caller gets responsability to delete it after usage

int	GetNumberOfOrientations ()
	gets the number of orientations

int	GetNumberOfScales ()
	gets the number of scales

Protected Member Functions
void	Initialize (ArrayGrid< double > *pSourceGrid, int nrScales, int nrOrientations=3, bool createBands=false, bool isSubsampled=true, bool isLowestScaleSubsampled=true)
	Initializes data structures and variables for decomposition. More...

Protected Attributes
int	mNrOrientations
	Number of orientations; default 3 with classical wavelets (LH, HL and HH)

int	mNrScales
	Number of scales.

Pyramid< double > *	mpPyramid
	data structure for decomposed bands with wavelet coefficients

ArrayGrid< double > *	mpDecomposeReconstructGrid
	grid after deompose/reconstruct

int	mCurrentScale
	number of the scale being computed

WaveletFilterSet	mSet
	the wavelet filter taps

ArrayGrid< double > *	mpSourceGrid
	pointer to source data before decomposition

Detailed Description

parent class to compute wavelet decomposition / reconstruction For the moment just a fast Haar wavelet is available. Fast in the sense that the downsampling and upsampling are directly integrated in the computations and that no unnecessary coefficients are computed that are removed by the subsampling

Member Function Documentation

virtual bool stira::wavelet::Wavelet::Decompose	(	ArrayGrid< double > *	pSourceGrid,
		int	nrScales
	)

pure virtual

decomposition

Parameters

pSourceGrid	grid to be deomposed
nrScales	nr of scales in the decomposition

Returns: true if all went well

Implemented in stira::wavelet::NonSubsampledTransform, stira::wavelet::CriticallySubsampledTransform, and stira::wavelet::SubsampledTransform.

void stira::wavelet::Wavelet::Initialize	(	ArrayGrid< double > *	pSourceGrid,
		int	nrScales,
		int	nrOrientations = `3`,
		bool	createBands = `false`,
		bool	isSubsampled = `true`,
		bool	isLowestScaleSubsampled = `true`
	)

protected

Initializes data structures and variables for decomposition.

Parameters

pSourceGrid	input grid to be decomposed
nrScales	the number of scales
nrOrientations	the number of orientations
createBands	flag whether we need to allocate the bands upon initialization
isSubsampled	flag whether the deomposition is subsampled
isLowestScaleSubsampled	flag whether the finest deomposed scale is subsampled (only used if isSubsampled is true)

References stira::imagedata::Pyramid< T >::CreateBands().

Referenced by stira::wavelet::CriticallySubsampledTransform::Decompose(), and stira::wavelet::NonSubsampledTransform::Decompose().

virtual bool stira::wavelet::Wavelet::Reconstruct ( double threshold = 0.0 )

pure virtual

reconstructs the decomposed image

Parameters

threshold hard threshold for bandpass images, just for demo purposes

Implemented in stira::wavelet::NonSubsampledTransform, stira::wavelet::CriticallySubsampledTransform, and stira::wavelet::SubsampledTransform.

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

wavelet/wavelet/Wavelet.h
wavelet/wavelet/Wavelet.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation