79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImageGradient.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkImageGradient
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* @brief Computes the gradient vector.
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*
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* vtkImageGradient computes the gradient vector of an image. The
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* vector results are stored as scalar components. The Dimensionality
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* determines whether to perform a 2d or 3d gradient. The default is
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* two dimensional XY gradient. OutputScalarType is always
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* double. Gradient is computed using central differences.
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*/
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#ifndef vtkImageGradient_h
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#define vtkImageGradient_h
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#include "vtkImagingGeneralModule.h" // For export macro
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#include "vtkThreadedImageAlgorithm.h"
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class VTKIMAGINGGENERAL_EXPORT vtkImageGradient : public vtkThreadedImageAlgorithm
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{
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public:
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static vtkImageGradient* New();
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vtkTypeMacro(vtkImageGradient, vtkThreadedImageAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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///@{
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/**
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* Determines how the input is interpreted (set of 2d slices ...)
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*/
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vtkSetClampMacro(Dimensionality, int, 2, 3);
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vtkGetMacro(Dimensionality, int);
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///@}
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///@{
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/**
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* Get/Set whether to handle boundaries. If enabled, boundary
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* pixels are treated as duplicated so that central differencing
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* works for the boundary pixels. If disabled, the output whole
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* extent of the image is reduced by one pixel.
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*/
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vtkSetMacro(HandleBoundaries, vtkTypeBool);
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vtkGetMacro(HandleBoundaries, vtkTypeBool);
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vtkBooleanMacro(HandleBoundaries, vtkTypeBool);
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///@}
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protected:
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vtkImageGradient();
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~vtkImageGradient() override = default;
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vtkTypeBool HandleBoundaries;
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int Dimensionality;
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int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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int RequestUpdateExtent(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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void ThreadedRequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*,
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vtkImageData*** inData, vtkImageData** outData, int outExt[6], int threadId) override;
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private:
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vtkImageGradient(const vtkImageGradient&) = delete;
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void operator=(const vtkImageGradient&) = delete;
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};
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#endif
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