/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImageHybridMedian2D.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 vtkImageHybridMedian2D - Median filter that preserves lines and 
// corners.
// .SECTION Description
// vtkImageHybridMedian2D is a median filter that preserves thin lines and
// corners.  It operates on a 5x5 pixel neighborhood.  It computes two values
// initially: the median of the + neighbors and the median of the x
// neighbors.  It then computes the median of these two values plus the center
// pixel.  This result of this second median is the output pixel value.



#ifndef __vtkImageHybridMedian2D_h
#define __vtkImageHybridMedian2D_h


#include "vtkImageSpatialAlgorithm.h"

class VTK_IMAGING_EXPORT vtkImageHybridMedian2D : public vtkImageSpatialAlgorithm
{
public:
  static vtkImageHybridMedian2D *New();
  vtkTypeRevisionMacro(vtkImageHybridMedian2D,vtkImageSpatialAlgorithm);

protected:
  vtkImageHybridMedian2D();
  ~vtkImageHybridMedian2D() {};

  void ThreadedRequestData(vtkInformation *request,
                           vtkInformationVector **inputVector,
                           vtkInformationVector *outputVector,
                           vtkImageData ***inData, vtkImageData **outData,
                           int outExt[6], int id);
private:
  vtkImageHybridMedian2D(const vtkImageHybridMedian2D&);  // Not implemented.
  void operator=(const vtkImageHybridMedian2D&);  // Not implemented.
};

#endif
