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vtkImageGradient.h
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vtkImageGradient.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageGradient.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 vtkImageGradient
* @brief Computes the gradient vector.
*
* vtkImageGradient computes the gradient vector of an image. The
* vector results are stored as scalar components. The Dimensionality
* determines whether to perform a 2d or 3d gradient. The default is
* two dimensional XY gradient. OutputScalarType is always
* double. Gradient is computed using central differences.
*/
#ifndef vtkImageGradient_h
#define vtkImageGradient_h
#include "vtkImagingGeneralModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"
class VTKIMAGINGGENERAL_EXPORT vtkImageGradient : public vtkThreadedImageAlgorithm
{
public:
static vtkImageGradient* New();
vtkTypeMacro(vtkImageGradient, vtkThreadedImageAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Determines how the input is interpreted (set of 2d slices ...)
*/
vtkSetClampMacro(Dimensionality, int, 2, 3);
vtkGetMacro(Dimensionality, int);
///@}
///@{
/**
* Get/Set whether to handle boundaries. If enabled, boundary
* pixels are treated as duplicated so that central differencing
* works for the boundary pixels. If disabled, the output whole
* extent of the image is reduced by one pixel.
*/
vtkSetMacro(HandleBoundaries, vtkTypeBool);
vtkGetMacro(HandleBoundaries, vtkTypeBool);
vtkBooleanMacro(HandleBoundaries, vtkTypeBool);
///@}
protected:
vtkImageGradient();
~vtkImageGradient() override = default;
vtkTypeBool HandleBoundaries;
int Dimensionality;
int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
void ThreadedRequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*,
vtkImageData*** inData, vtkImageData** outData, int outExt[6], int threadId) override;
private:
vtkImageGradient(const vtkImageGradient&) = delete;
void operator=(const vtkImageGradient&) = delete;
};
#endif