text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkImageLaplacian.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.
  
  =========================================================================*/
  // .NAME vtkImageLaplacian - Computes divergence of gradient.
  // .SECTION Description
  // vtkImageLaplacian computes the Laplacian (like a second derivative)
  // of a scalar image.  The operation is the same as taking the
  // divergence after a gradient.  Boundaries are handled, so the input
  // is the same as the output.
  // Dimensionality determines how the input regions are interpreted.
  // (images, or volumes). The Dimensionality defaults to two.
  
  
  
  #ifndef __vtkImageLaplacian_h
  #define __vtkImageLaplacian_h
  
  
  #include "vtkImagingGeneralModule.h" // For export macro
  #include "vtkThreadedImageAlgorithm.h"
  
  class VTKIMAGINGGENERAL_EXPORT vtkImageLaplacian : public vtkThreadedImageAlgorithm
  {
  public:
    static vtkImageLaplacian *New();
    vtkTypeMacro(vtkImageLaplacian,vtkThreadedImageAlgorithm);
    void PrintSelf(ostream& os, vtkIndent indent);
  
    // Description:
    // Determines how the input is interpreted (set of 2d slices ...)
    vtkSetClampMacro(Dimensionality,int,2,3);
    vtkGetMacro(Dimensionality,int);
  
  protected:
    vtkImageLaplacian();
    ~vtkImageLaplacian() {};
  
    int Dimensionality;
  
    virtual int RequestUpdateExtent (vtkInformation *, vtkInformationVector **,
      vtkInformationVector *);
    void ThreadedRequestData(vtkInformation *request,
                             vtkInformationVector **inputVector,
                             vtkInformationVector *outputVector,
                             vtkImageData ***inData, vtkImageData **outData,
                             int outExt[6], int id);
  
  private:
    vtkImageLaplacian(const vtkImageLaplacian&);  // Not implemented.
    void operator=(const vtkImageLaplacian&);  // Not implemented.
  };
  
  #endif
  
  
  
  