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vtkImageAnisotropicDiffusion2D Class Reference

edge preserving smoothing. More...

#include <vtkImageAnisotropicDiffusion2D.h>

Inheritance diagram for vtkImageAnisotropicDiffusion2D:

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Collaboration diagram for vtkImageAnisotropicDiffusion2D:

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List of all members.

Public Methods

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
void SetNumberOfIterations (int num)
virtual int GetNumberOfIterations ()
virtual void SetDiffusionThreshold (float)
virtual float GetDiffusionThreshold ()
virtual void SetDiffusionFactor (float)
virtual float GetDiffusionFactor ()
virtual void SetFaces (int)
virtual int GetFaces ()
virtual void FacesOn ()
virtual void FacesOff ()
virtual void SetEdges (int)
virtual int GetEdges ()
virtual void EdgesOn ()
virtual void EdgesOff ()
virtual void SetCorners (int)
virtual int GetCorners ()
virtual void CornersOn ()
virtual void CornersOff ()
virtual void SetGradientMagnitudeThreshold (int)
virtual int GetGradientMagnitudeThreshold ()
virtual void GradientMagnitudeThresholdOn ()
virtual void GradientMagnitudeThresholdOff ()

Static Public Methods

vtkImageAnisotropicDiffusion2D * New ()
int IsTypeOf (const char *type)
vtkImageAnisotropicDiffusion2D * SafeDownCast (vtkObject *o)

Protected Methods

 vtkImageAnisotropicDiffusion2D ()
 ~vtkImageAnisotropicDiffusion2D ()
void ThreadedExecute (vtkImageData *inData, vtkImageData *outData, int extent[6], int id)
void Iterate (vtkImageData *in, vtkImageData *out, float ar0, float ar1, int *coreExtent, int count)

Protected Attributes

int NumberOfIterations
float DiffusionThreshold
float DiffusionFactor
int Faces
int Edges
int Corners
int GradientMagnitudeThreshold

Detailed Description

edge preserving smoothing.

Date:
2001/12/07 14:02:27
Revision:
1.29
Thanks:
Thanks to C. Charles Law who developed this class.
vtkImageAnisotropicDiffusion2D diffuses a 2d image iteratively. The neighborhood of the diffusion is determined by the instance flags. If "Edges" is on the 4 edge connected voxels are included, and if "Corners" is on, the 4 corner connected voxels are included. "DiffusionFactor" determines how far a pixel value moves toward its neighbors, and is insensitive to the number of neighbors chosen. The diffusion is anisotropic because it only occurs when a gradient measure is below "GradientThreshold". Two gradient measures exist and are toggled by the "GradientMagnitudeThreshold" flag. When "GradientMagnitudeThreshold" is on, the magnitude of the gradient, computed by central differences, above "DiffusionThreshold" a voxel is not modified. The alternative measure examines each neighbor independently. The gradient between the voxel and the neighbor must be below the "DiffusionThreshold" for diffusion to occur with THAT neighbor.

See also:
vtkImageAnisotropicDiffusion3D
Tests:
vtkImageAnisotropicDiffusion2D (Tests)

Definition at line 76 of file vtkImageAnisotropicDiffusion2D.h.


Constructor & Destructor Documentation

vtkImageAnisotropicDiffusion2D::vtkImageAnisotropicDiffusion2D   [protected]
 

vtkImageAnisotropicDiffusion2D::~vtkImageAnisotropicDiffusion2D   [inline, protected]
 

Definition at line 137 of file vtkImageAnisotropicDiffusion2D.h.


Member Function Documentation

vtkImageAnisotropicDiffusion2D* vtkImageAnisotropicDiffusion2D::New   [static]
 

Instantiate object with no start, end, or progress methods.

Reimplemented from vtkImageSpatialFilter.

virtual const char* vtkImageAnisotropicDiffusion2D::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 vtkImageSpatialFilter.

int vtkImageAnisotropicDiffusion2D::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 vtkImageSpatialFilter.

virtual int vtkImageAnisotropicDiffusion2D::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 vtkImageSpatialFilter.

vtkImageAnisotropicDiffusion2D* vtkImageAnisotropicDiffusion2D::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 vtkImageSpatialFilter.

void vtkImageAnisotropicDiffusion2D::PrintSelf ostream &    os,
vtkIndent    indent
[virtual]
 

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkImageSpatialFilter.

void vtkImageAnisotropicDiffusion2D::SetNumberOfIterations int    num
 

This method sets the number of interations which also affects the input neighborhood needed to compute one output pixel. Each iterations requires an extra pixel layer on the neighborhood. This is only relavent when you are trying to stream or are requesting a sub extent of the "wholeExtent".

virtual int vtkImageAnisotropicDiffusion2D::GetNumberOfIterations   [virtual]
 

Get the number of iterations.

virtual void vtkImageAnisotropicDiffusion2D::SetDiffusionThreshold float    [virtual]
 

Set/Get the difference threshold that stops diffusion. when the difference between two pixel is greater than this threshold, the pixels are not diffused. This causes diffusion to avoid sharp edges. If the GradientMagnitudeThreshold is set, then gradient magnitude is used for comparison instead of pixel differences.

virtual float vtkImageAnisotropicDiffusion2D::GetDiffusionThreshold   [virtual]
 

Set/Get the difference threshold that stops diffusion. when the difference between two pixel is greater than this threshold, the pixels are not diffused. This causes diffusion to avoid sharp edges. If the GradientMagnitudeThreshold is set, then gradient magnitude is used for comparison instead of pixel differences.

virtual void vtkImageAnisotropicDiffusion2D::SetDiffusionFactor float    [virtual]
 

The diffusion factor specifies how much neighboring pixels effect each other. No diffusion occurs with a factor of 0, and a diffusion factor of 1 causes the pixel to become the average of all its neighbors.

virtual float vtkImageAnisotropicDiffusion2D::GetDiffusionFactor   [virtual]
 

The diffusion factor specifies how much neighboring pixels effect each other. No diffusion occurs with a factor of 0, and a diffusion factor of 1 causes the pixel to become the average of all its neighbors.

virtual void vtkImageAnisotropicDiffusion2D::SetFaces int    [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual int vtkImageAnisotropicDiffusion2D::GetFaces   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::FacesOn   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::FacesOff   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::SetEdges int    [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual int vtkImageAnisotropicDiffusion2D::GetEdges   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::EdgesOn   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::EdgesOff   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::SetCorners int    [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual int vtkImageAnisotropicDiffusion2D::GetCorners   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::CornersOn   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::CornersOff   [virtual]
 

Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).

virtual void vtkImageAnisotropicDiffusion2D::SetGradientMagnitudeThreshold int    [virtual]
 

Switch between gradient magnitude threshold and pixel gradient threshold.

virtual int vtkImageAnisotropicDiffusion2D::GetGradientMagnitudeThreshold   [virtual]
 

Switch between gradient magnitude threshold and pixel gradient threshold.

virtual void vtkImageAnisotropicDiffusion2D::GradientMagnitudeThresholdOn   [virtual]
 

Switch between gradient magnitude threshold and pixel gradient threshold.

virtual void vtkImageAnisotropicDiffusion2D::GradientMagnitudeThresholdOff   [virtual]
 

Switch between gradient magnitude threshold and pixel gradient threshold.

void vtkImageAnisotropicDiffusion2D::ThreadedExecute vtkImageData   inData,
vtkImageData   outData,
int    extent[6],
int    id
[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.

void vtkImageAnisotropicDiffusion2D::Iterate vtkImageData   in,
vtkImageData   out,
float    ar0,
float    ar1,
int *    coreExtent,
int    count
[protected]
 


Member Data Documentation

int vtkImageAnisotropicDiffusion2D::NumberOfIterations [protected]
 

Definition at line 139 of file vtkImageAnisotropicDiffusion2D.h.

float vtkImageAnisotropicDiffusion2D::DiffusionThreshold [protected]
 

Definition at line 140 of file vtkImageAnisotropicDiffusion2D.h.

float vtkImageAnisotropicDiffusion2D::DiffusionFactor [protected]
 

Definition at line 141 of file vtkImageAnisotropicDiffusion2D.h.

int vtkImageAnisotropicDiffusion2D::Faces [protected]
 

Definition at line 143 of file vtkImageAnisotropicDiffusion2D.h.

int vtkImageAnisotropicDiffusion2D::Edges [protected]
 

Definition at line 144 of file vtkImageAnisotropicDiffusion2D.h.

int vtkImageAnisotropicDiffusion2D::Corners [protected]
 

Definition at line 145 of file vtkImageAnisotropicDiffusion2D.h.

int vtkImageAnisotropicDiffusion2D::GradientMagnitudeThreshold [protected]
 

Definition at line 147 of file vtkImageAnisotropicDiffusion2D.h.


The documentation for this class was generated from the following file:
Generated on Thu Mar 28 14:30:00 2002 for VTK by doxygen1.2.11.1 written by Dimitri van Heesch, © 1997-2001