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vtkImageSkeleton2D.h
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vtkImageSkeleton2D.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageSkeleton2D.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 vtkImageSkeleton2D
* @brief Skeleton of 2D images.
*
* vtkImageSkeleton2D should leave only single pixel width lines
* of non-zero-valued pixels (values of 1 are not allowed).
* It works by erosion on a 3x3 neighborhood with special rules.
* The number of iterations determines how far the filter can erode.
* There are three pruning levels:
* prune == 0 will leave traces on all angles...
* prune == 1 will not leave traces on 135 degree angles, but will on 90.
* prune == 2 does not leave traces on any angles leaving only closed loops.
* Prune defaults to zero. The output scalar type is the same as the input.
*/
#ifndef vtkImageSkeleton2D_h
#define vtkImageSkeleton2D_h
#include "vtkImageIterateFilter.h"
#include "vtkImagingMorphologicalModule.h" // For export macro
class VTKIMAGINGMORPHOLOGICAL_EXPORT vtkImageSkeleton2D : public vtkImageIterateFilter
{
public:
static vtkImageSkeleton2D* New();
vtkTypeMacro(vtkImageSkeleton2D, vtkImageIterateFilter);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* When prune is on, only closed loops are left unchanged.
*/
vtkSetMacro(Prune, vtkTypeBool);
vtkGetMacro(Prune, vtkTypeBool);
vtkBooleanMacro(Prune, vtkTypeBool);
///@}
/**
* Sets the number of cycles in the erosion.
*/
void SetNumberOfIterations(int num) override;
protected:
vtkImageSkeleton2D();
~vtkImageSkeleton2D() override = default;
vtkTypeBool Prune;
int IterativeRequestUpdateExtent(vtkInformation* in, vtkInformation* out) override;
void ThreadedRequestData(vtkInformation* request, vtkInformationVector** inputVector,
vtkInformationVector* outputVector, vtkImageData*** inDataV, vtkImageData** outDataV,
int outExt[6], int id) override;
private:
vtkImageSkeleton2D(const vtkImageSkeleton2D&) = delete;
void operator=(const vtkImageSkeleton2D&) = delete;
};
#endif