You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
4.8 KiB
C++
139 lines
4.8 KiB
C++
/*=========================================================================
|
|
|
|
Program: Visualization Toolkit
|
|
Module: vtkImageAnisotropicDiffusion3D.h
|
|
|
|
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
|
|
All rights reserved.
|
|
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
|
|
|
|
This software is distributed WITHOUT ANY WARRANTY; without even
|
|
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
PURPOSE. See the above copyright notice for more information.
|
|
|
|
=========================================================================*/
|
|
/**
|
|
* @class vtkImageAnisotropicDiffusion3D
|
|
* @brief edge preserving smoothing.
|
|
*
|
|
*
|
|
* vtkImageAnisotropicDiffusion3D diffuses an volume iteratively.
|
|
* The neighborhood of the diffusion is determined by the instance
|
|
* flags. if "Faces" is on, the 6 voxels adjoined by faces are included
|
|
* in the neighborhood. If "Edges" is on the 12 edge connected voxels
|
|
* are included, and if "Corners" is on, the 8 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.
|
|
*
|
|
* @sa
|
|
* vtkImageAnisotropicDiffusion2D
|
|
*/
|
|
|
|
#ifndef vtkImageAnisotropicDiffusion3D_h
|
|
#define vtkImageAnisotropicDiffusion3D_h
|
|
|
|
#include "vtkImageSpatialAlgorithm.h"
|
|
#include "vtkImagingGeneralModule.h" // For export macro
|
|
|
|
class VTKIMAGINGGENERAL_EXPORT vtkImageAnisotropicDiffusion3D : public vtkImageSpatialAlgorithm
|
|
{
|
|
public:
|
|
static vtkImageAnisotropicDiffusion3D* New();
|
|
vtkTypeMacro(vtkImageAnisotropicDiffusion3D, vtkImageSpatialAlgorithm);
|
|
void PrintSelf(ostream& os, vtkIndent indent) override;
|
|
|
|
/**
|
|
* This method sets the number of iterations 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 relevant
|
|
* when you are trying to stream or are requesting a sub extent of the "wholeExtent".
|
|
*/
|
|
void SetNumberOfIterations(int num);
|
|
|
|
//@{
|
|
/**
|
|
* Get the number of iterations.
|
|
*/
|
|
vtkGetMacro(NumberOfIterations, int);
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* 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.
|
|
*/
|
|
vtkSetMacro(DiffusionThreshold, double);
|
|
vtkGetMacro(DiffusionThreshold, double);
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* Set/Get the difference factor
|
|
*/
|
|
vtkSetMacro(DiffusionFactor, double);
|
|
vtkGetMacro(DiffusionFactor, double);
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* Choose neighbors to diffuse (6 faces, 12 edges, 8 corners).
|
|
*/
|
|
vtkSetMacro(Faces, vtkTypeBool);
|
|
vtkGetMacro(Faces, vtkTypeBool);
|
|
vtkBooleanMacro(Faces, vtkTypeBool);
|
|
vtkSetMacro(Edges, vtkTypeBool);
|
|
vtkGetMacro(Edges, vtkTypeBool);
|
|
vtkBooleanMacro(Edges, vtkTypeBool);
|
|
vtkSetMacro(Corners, vtkTypeBool);
|
|
vtkGetMacro(Corners, vtkTypeBool);
|
|
vtkBooleanMacro(Corners, vtkTypeBool);
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* Switch between gradient magnitude threshold and pixel gradient threshold.
|
|
*/
|
|
vtkSetMacro(GradientMagnitudeThreshold, vtkTypeBool);
|
|
vtkGetMacro(GradientMagnitudeThreshold, vtkTypeBool);
|
|
vtkBooleanMacro(GradientMagnitudeThreshold, vtkTypeBool);
|
|
//@}
|
|
|
|
protected:
|
|
vtkImageAnisotropicDiffusion3D();
|
|
~vtkImageAnisotropicDiffusion3D() override {}
|
|
|
|
int NumberOfIterations;
|
|
double DiffusionThreshold;
|
|
double DiffusionFactor;
|
|
// to determine which neighbors to diffuse
|
|
vtkTypeBool Faces;
|
|
vtkTypeBool Edges;
|
|
vtkTypeBool Corners;
|
|
// What threshold to use
|
|
vtkTypeBool GradientMagnitudeThreshold;
|
|
|
|
void ThreadedRequestData(vtkInformation* request, vtkInformationVector** inputVector,
|
|
vtkInformationVector* outputVector, vtkImageData*** inData, vtkImageData** outData,
|
|
int extent[6], int id) override;
|
|
void Iterate(vtkImageData* in, vtkImageData* out, double ar0, double ar1, double ar3,
|
|
int* coreExtent, int count);
|
|
|
|
private:
|
|
vtkImageAnisotropicDiffusion3D(const vtkImageAnisotropicDiffusion3D&) = delete;
|
|
void operator=(const vtkImageAnisotropicDiffusion3D&) = delete;
|
|
};
|
|
|
|
#endif
|