svkImageLinearPhase Class Reference

#include <svkImageLinearPhase.h>

Inheritance diagram for svkImageLinearPhase:

Public Member Functions
	vtkTypeMacro (svkImageLinearPhase, vtkImageFourierFilter)
void	SetShiftWindow (double shiftWindow[3])
void	ExecuteLinearPhase (vtkImageComplex *in, vtkImageComplex *out, int N, vtkImageComplex *phaseArray)
void	CreatePhaseArray (int N, vtkImageComplex *phaseArray)
int	IterativeRequestInformation (vtkInformation *vtkNotUsed(input), vtkInformation *output)

Static Public Member Functions
static svkImageLinearPhase *	New ()

Protected Member Functions
	svkImageLinearPhase ()
	~svkImageLinearPhase ()

Detailed Description

This class will apply a linear phase shift to a vtkImageData object.

NOTES:

• This class will NOT change the origin of your dataset.
• This class is a vtk Algroithm, not svk so it will not update the header. This is because it inherits from a vtk algorithm.

TODO:

• Create an svkMriLinearPhase to wrap this algorithm so that it can produce an svk output dataset.

Constructor & Destructor Documentation

svkImageLinearPhase ( )

protected

~svkImageLinearPhase ( )

protected

Member Function Documentation

void CreatePhaseArray	(	int	N,
		vtkImageComplex *	phaseArray
	)

This method takes an array of N, vtkImageComplex values, where vtkImageComplex is a struct with a double real and double imaginary component representing a single complex value. The function applies a linear phase correction to the values with pivot given by the origin (middle index of array) and linear factor that increments by 2*pi/N. An additional phase shift may be applied (e.g. for voxel shifting origin. On output the vtkImageComplex variable phaseArray contains the phase factors to be applied to each point.

References svkSpecUtils::CreateLinearPhaseShiftArray().

void ExecuteLinearPhase	(	vtkImageComplex *	in,
		vtkImageComplex *	out,
		int	N,
		vtkImageComplex *	phaseArray
	)

Applies a first order phase correction to the in data. The array of phase corrections is calcuated by CreatePhaseArray() method.

int IterativeRequestInformation	(	vtkInformation *	vtkNotUsedinput,
		vtkInformation *	output
	)

static svkImageLinearPhase* New ( )

static

Referenced by svkMriZeroFill::RequestData(), and svkMrsImageFFT::RequestDataSpatial().

void SetShiftWindow

(

double

shiftWindow[3]

)

Set an additional phase shift for example to voxel shift data.

Referenced by svkMriZeroFill::RequestData(), and svkMrsImageFFT::RequestDataSpatial().

vtkTypeMacro	(	svkImageLinearPhase	,
		vtkImageFourierFilter
	)

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

• svkImageLinearPhase.h
• svkImageLinearPhase.cc