vtkImageFFT Class Reference

#include <vtkImageFFT.h>

Inheritance diagram for vtkImageFFT:

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Collaboration diagram for vtkImageFFT:

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List of all members.


Detailed Description

Fast Fourier Transform.

vtkImageFFT implements a fast Fourier transform. The input can have real or complex data in any components and data types, but the output is always complex doubles with real values in component0, and imaginary values in component1. The filter is fastest for images that have power of two sizes. The filter uses a butterfly fitlers for each prime factor of the dimension. This makes images with prime number dimensions (i.e. 17x17) much slower to compute. Multi dimensional (i.e volumes) FFT's are decomposed so that each axis executes in series.

Tests:
vtkImageFFT (Tests)

Definition at line 37 of file vtkImageFFT.h.


Public Types

typedef vtkImageFourierFilter Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
int SplitExtent (int splitExt[6], int startExt[6], int num, int total)

Static Public Member Functions

static vtkImageFFTNew ()
static int IsTypeOf (const char *type)
static vtkImageFFTSafeDownCast (vtkObject *o)

Protected Member Functions

 vtkImageFFT ()
 ~vtkImageFFT ()
virtual int IterativeRequestInformation (vtkInformation *in, vtkInformation *out)
virtual int IterativeRequestUpdateExtent (vtkInformation *in, vtkInformation *out)
void ThreadedExecute (vtkImageData *inData, vtkImageData *outData, int outExt[6], int threadId)

Member Typedef Documentation

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3.

Reimplemented from vtkImageFourierFilter.

Definition at line 41 of file vtkImageFFT.h.


Constructor & Destructor Documentation

vtkImageFFT::vtkImageFFT (  )  [inline, protected]

Definition at line 56 of file vtkImageFFT.h.

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

Definition at line 57 of file vtkImageFFT.h.


Member Function Documentation

static vtkImageFFT* vtkImageFFT::New (  )  [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkAlgorithm.

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

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3.

Reimplemented from vtkImageFourierFilter.

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

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3.

Reimplemented from vtkImageFourierFilter.

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

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3.

Reimplemented from vtkImageFourierFilter.

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

Construct an instance of vtkImageDecomposeFilter filter with default dimensionality 3.

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 vtkThreadedImageAlgorithm.

virtual int vtkImageFFT::IterativeRequestInformation ( vtkInformation in,
vtkInformation out 
) [protected, virtual]

Reimplemented from vtkImageIterateFilter.

virtual int vtkImageFFT::IterativeRequestUpdateExtent ( vtkInformation in,
vtkInformation out 
) [protected, virtual]

Reimplemented from vtkImageIterateFilter.

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

Reimplemented from vtkThreadedImageAlgorithm.


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

Generated on Sat Dec 27 13:29:42 2008 for VTK by  doxygen 1.5.6