vtkImageAnisotropicDiffusion2D Class Reference

#include <vtkImageAnisotropicDiffusion2D.h>

Inheritance diagram for vtkImageAnisotropicDiffusion2D:

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Collaboration diagram for vtkImageAnisotropicDiffusion2D:

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List of all members.

Detailed Description

edge preserving smoothing.

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 47 of file vtkImageAnisotropicDiffusion2D.h.


Public Types
typedef vtkImageSpatialAlgorithm	Superclass
Public Member Functions
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 (double)
virtual double	GetDiffusionThreshold ()

virtual void	SetDiffusionFactor (double)
virtual double	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 Member Functions
static vtkImageAnisotropicDiffusion2D *	New ()
static int	IsTypeOf (const char *type)
static vtkImageAnisotropicDiffusion2D *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkImageAnisotropicDiffusion2D ()
	~vtkImageAnisotropicDiffusion2D ()
void	ThreadedRequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector, vtkImageData *inData, vtkImageData outData, int extent[6], int id)
void	Iterate (vtkImageData in, vtkImageData out, double ar0, double ar1, int *coreExtent, int count)
Protected Attributes
int	NumberOfIterations
double	DiffusionThreshold
double	DiffusionFactor
int	Faces
int	Edges
int	Corners
int	GradientMagnitudeThreshold

Member Typedef Documentation

typedef vtkImageSpatialAlgorithm vtkImageAnisotropicDiffusion2D::Superclass

Reimplemented from vtkImageSpatialAlgorithm.

Definition at line 51 of file vtkImageAnisotropicDiffusion2D.h.

Constructor & Destructor Documentation

vtkImageAnisotropicDiffusion2D::vtkImageAnisotropicDiffusion2D ( ) [protected]

vtkImageAnisotropicDiffusion2D::~vtkImageAnisotropicDiffusion2D ( ) [inline, protected]

Definition at line 108 of file vtkImageAnisotropicDiffusion2D.h.

Member Function Documentation

static vtkImageAnisotropicDiffusion2D* vtkImageAnisotropicDiffusion2D::New ( ) [static]

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

Reimplemented from vtkImageSpatialAlgorithm.

virtual const char* vtkImageAnisotropicDiffusion2D::GetClassName ( ) [virtual]

Reimplemented from vtkImageSpatialAlgorithm.

static int vtkImageAnisotropicDiffusion2D::IsTypeOf ( const char * name ) [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkImageSpatialAlgorithm.

virtual int vtkImageAnisotropicDiffusion2D::IsA ( const char * name ) [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkImageSpatialAlgorithm.

static vtkImageAnisotropicDiffusion2D* vtkImageAnisotropicDiffusion2D::SafeDownCast ( vtkObject * o ) [static]

Reimplemented from vtkImageSpatialAlgorithm.

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 vtkImageSpatialAlgorithm.

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 ( double ) [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 double 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 ( double ) [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 double 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]