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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkImageVariance3D.h,v $
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 vtkImageVariance3D - Variance in a neighborhood.
// .SECTION Description
// vtkImageVariance3D replaces each pixel with a measurement of
// pixel variance in a elliptical neighborhood centered on that pixel.
// The value computed is not exactly the variance.
// The difference between the neighbor values and center value is computed
// and squared for each neighbor. These values are summed and divided by
// the total number of neighbors to produce the output value.
#ifndef __vtkImageVariance3D_h
#define __vtkImageVariance3D_h
#include "vtkImageSpatialAlgorithm.h"
class vtkImageEllipsoidSource;
class VTK_IMAGING_EXPORT vtkImageVariance3D : public vtkImageSpatialAlgorithm
{
public:
static vtkImageVariance3D *New();
vtkTypeRevisionMacro(vtkImageVariance3D,vtkImageSpatialAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// This method sets the size of the neighborhood. It also sets the default
// middle of the neighborhood and computes the Elliptical foot print.
void SetKernelSize(int size0, int size1, int size2);
protected:
vtkImageVariance3D();
~vtkImageVariance3D();
vtkImageEllipsoidSource *Ellipse;
virtual int RequestInformation (vtkInformation *request,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector);
void ThreadedRequestData(vtkInformation *request,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector,
vtkImageData ***inData, vtkImageData **outData,
int extent[6], int id);
virtual int RequestData(vtkInformation *request,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector);
private:
vtkImageVariance3D(const vtkImageVariance3D&); // Not implemented.
void operator=(const vtkImageVariance3D&); // Not implemented.
};
#endif
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