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

  Program:   Visualization Toolkit
  Module:    vtkImageCorrelation.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
  Thanks:    Thanks to C. Charles Law who developed this class.

Copyright (c) 1993-2000 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkImageCorrelation - Correlation imageof the two inputs.
// .SECTION Description
// vtkImageCorrelation finds the correlation between two data sets. 
// SetDimensionality determines
// whether the Correlation will be 3D, 2D or 1D.  
// The default is a 2D Correlation.  The Output type will be float.
// The output size will match the size of the first input.
// The second input is considered the correlation kernel.

#ifndef __vtkImageCorrelation_h
#define __vtkImageCorrelation_h



#include "vtkImageTwoInputFilter.h"

class VTK_EXPORT vtkImageCorrelation : public vtkImageTwoInputFilter
{
public:
  static vtkImageCorrelation *New();
  vtkTypeMacro(vtkImageCorrelation,vtkImageTwoInputFilter);
  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:
  vtkImageCorrelation();
  ~vtkImageCorrelation() {};
  vtkImageCorrelation(const vtkImageCorrelation&) {};
  void operator=(const vtkImageCorrelation&) {};

  int Dimensionality;
  void ExecuteInformation(vtkImageData **inDatas, vtkImageData *outData);
  virtual void ComputeInputUpdateExtent(int inExt[6], int outExt[6],
					int whichInput);
  void ExecuteInformation(){this->vtkImageTwoInputFilter::ExecuteInformation();};
  void ThreadedExecute(vtkImageData **inDatas, vtkImageData *outData,
		       int extent[6], int id);
};

#endif



