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vtkImageFFT Class Reference

Fast Fourier Transform. More...

#include <vtkImageFFT.h>

Inheritance diagram for vtkImageFFT:

[legend]Collaboration diagram for vtkImageFFT:

[legend]List of all members.

Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
int	SplitExtent (int splitExt[6], int startExt[6], int num, int total)
Static Public Methods
vtkImageFFT *	New ()
int	IsTypeOf (const char *type)
vtkImageFFT *	SafeDownCast (vtkObject *o)
Protected Methods
	vtkImageFFT ()
	~vtkImageFFT ()
	vtkImageFFT (const vtkImageFFT &)
void	operator= (const vtkImageFFT &)
void	ExecuteInformation (vtkImageData *inData, vtkImageData *outData)
void	ComputeInputUpdateExtent (int inExt[6], int outExt[6])
void	ExecuteInformation ()
void	ThreadedExecute (vtkImageData *inData, vtkImageData *outData, int outExt[6], int threadId)

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Detailed Description

Fast Fourier Transform.

Date:

2000/12/10 20:09:06

Revision:

1.24

Thanks:

Thanks to C. Charles Law who developed this class.

vtkImageFFT implements a fast Fourier transform. The input can have real or imaginary data in any components and data types, but the output is always float with real values in component0, and imaginary values in component1. The filter is fastest for images that have power of two sizes. Multi dimensional FFT's are decomposed so that each axis executes in series.

Examples:

vtkImageFFT (examples)

Definition at line 64 of file vtkImageFFT.h.

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Constructor & Destructor Documentation

vtkImageFFT::vtkImageFFT (    )  [inline, protected]

Definition at line 81 of file vtkImageFFT.h.

vtkImageFFT::~vtkImageFFT (    )  [inline, protected]

Definition at line 82 of file vtkImageFFT.h.

vtkImageFFT::vtkImageFFT (  const vtkImageFFT &    )  [inline, protected]

Definition at line 83 of file vtkImageFFT.h.

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Member Function Documentation

vtkImageFFT* vtkImageFFT::New (    )  [static]

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3. Reimplemented from vtkImageFourierFilter.

virtual const char* vtkImageFFT::GetClassName (    )  [virtual]

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkImageFourierFilter.

int vtkImageFFT::IsTypeOf (  const char *    type )  [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkImageFourierFilter.

virtual int vtkImageFFT::IsA (  const char *    type )  [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkImageFourierFilter.

vtkImageFFT* vtkImageFFT::SafeDownCast (  vtkObject *    o )  [static]

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h. Reimplemented from vtkImageFourierFilter.

int vtkImageFFT::SplitExtent (  int    splitExt[6], int    startExt[6], int    num, int    total )  [virtual]

Used internally for streaming and threads. Splits output update extent into num pieces. This method needs to be called num times. Results must not overlap for consistent starting extent. Subclass can override this method. This method returns the number of pieces resulting from a successful split. This can be from 1 to "total". If 1 is returned, the extent cannot be split. Reimplemented from vtkImageToImageFilter.

void vtkImageFFT::operator= (  const vtkImageFFT &    )  [inline, protected]

Definition at line 84 of file vtkImageFFT.h.

void vtkImageFFT::ExecuteInformation (  vtkImageData *    inData, vtkImageData *    outData )  [protected, virtual]

Reimplemented from vtkImageIterateFilter.

void vtkImageFFT::ComputeInputUpdateExtent (  int    inExt[6], int    outExt[6] )  [protected, virtual]

Reimplemented from vtkImageIterateFilter.

void vtkImageFFT::ExecuteInformation (    )  [inline, protected, virtual]

Reimplemented from vtkImageIterateFilter. Definition at line 88 of file vtkImageFFT.h.

void vtkImageFFT::ThreadedExecute (  vtkImageData *    inData, vtkImageData *    outData, int    outExt[6], int    threadId )  [protected, virtual]

If the subclass does not define an Execute method, then the task will be broken up, multiple threads will be spawned, and each thread will call this method. It is public so that the thread functions can call this method. Reimplemented from vtkImageToImageFilter.

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

• imaging/vtkImageFFT.h

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