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95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSubPixelPositionEdgels.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 vtkSubPixelPositionEdgels
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* @brief adjust edgel locations based on gradients.
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*
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* vtkSubPixelPositionEdgels is a filter that takes a series of linked
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* edgels (digital curves) and gradient maps as input. It then adjusts
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* the edgel locations based on the gradient data. Specifically, the
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* algorithm first determines the neighboring gradient magnitudes of
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* an edgel using simple interpolation of its neighbors. It then fits
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* the following three data points: negative gradient direction
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* gradient magnitude, edgel gradient magnitude and positive gradient
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* direction gradient magnitude to a quadratic function. It then
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* solves this quadratic to find the maximum gradient location along
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* the gradient orientation. It then modifies the edgels location
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* along the gradient orientation to the calculated maximum
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* location. This algorithm does not adjust an edgel in the direction
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* orthogonal to its gradient vector.
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*
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* @sa
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* vtkImageData vtkImageGradient vtkLinkEdgels
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*/
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#ifndef vtkSubPixelPositionEdgels_h
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#define vtkSubPixelPositionEdgels_h
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#include "vtkFiltersGeneralModule.h" // For export macro
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#include "vtkPolyDataAlgorithm.h"
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class vtkStructuredPoints;
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class vtkDataArray;
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class VTKFILTERSGENERAL_EXPORT vtkSubPixelPositionEdgels : public vtkPolyDataAlgorithm
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{
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public:
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static vtkSubPixelPositionEdgels* New();
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vtkTypeMacro(vtkSubPixelPositionEdgels, vtkPolyDataAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Set/Get the gradient data for doing the position adjustments.
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*/
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void SetGradMapsData(vtkStructuredPoints* gm);
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vtkStructuredPoints* GetGradMaps();
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//@}
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//@{
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/**
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* These methods can make the positioning look for a target scalar value
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* instead of looking for a maximum.
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*/
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vtkSetMacro(TargetFlag, vtkTypeBool);
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vtkGetMacro(TargetFlag, vtkTypeBool);
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vtkBooleanMacro(TargetFlag, vtkTypeBool);
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vtkSetMacro(TargetValue, double);
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vtkGetMacro(TargetValue, double);
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//@}
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protected:
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vtkSubPixelPositionEdgels();
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~vtkSubPixelPositionEdgels() override;
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// Usual data generation method
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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int FillInputPortInformation(int port, vtkInformation* info) override;
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void Move(int xdim, int ydim, int zdim, int x, int y, float* img, vtkDataArray* inVecs,
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double* result, int z, double* aspect, double* resultNormal);
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void Move(int xdim, int ydim, int zdim, int x, int y, double* img, vtkDataArray* inVecs,
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double* result, int z, double* aspect, double* resultNormal);
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// extension for target instead of maximum
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vtkTypeBool TargetFlag;
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double TargetValue;
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private:
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vtkSubPixelPositionEdgels(const vtkSubPixelPositionEdgels&) = delete;
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void operator=(const vtkSubPixelPositionEdgels&) = delete;
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};
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#endif
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