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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCountImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2006/03/29 14:53:40 $
  Version:   $Revision: 1.5 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.

=========================================================================*/
#ifndef __itkLocalDistanceMapImageFilter_h
#define __itkLocalDistanceMapImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImage.h"
#include "itkNumericTraits.h"

namespace itk
{
/** \class LocalDistanceMapImageFilter
 * \brief computes a Hausdorff based Local Distance Map  
 *
 * Computes an image where a given pixel is the Hausdorff distance of the
 * the corresponding pixels in an input edge image.
 *
 * \ingroup IntensityImageFilters 
 */
template <class TDistance1,class TDistance2, class TOutputImage>
class ITK_EXPORT LocalDistanceMapImageFilter : 
public ImageToImageFilter<TDistance1, TOutputImage>
{
public:

  /** Extract dimension from input and output image. */
  itkStaticConstMacro(Distance1Dimension, unsigned int,
                      TDistance1::ImageDimension);
  itkStaticConstMacro(Distance2Dimension, unsigned int,
                      TDistance2::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  /** Convenient typedefs for simplifying declarations. */
  typedef TDistance1 Distance1Type;
  typedef TDistance2 Distance2Type;
  typedef TOutputImage OutputImageType;

  /** Standard class typedefs. */
  typedef LocalDistanceMapImageFilter Self;
  typedef ImageToImageFilter< Distance1Type, OutputImageType> Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** Run-time type information (and related methods). */
  itkTypeMacro(CountImageFilter, ImageToImageFilter);
  

  /** Image typedef support. */
  typedef typename Distance1Type::PixelType Distance1PixelType;
  typedef typename Distance2Type::PixelType Distance2PixelType;

  typedef typename OutputImageType::PixelType OutputPixelType;
  
  typedef typename Distance1Type::RegionType Distance1RegionType;
  typedef typename Distance2Type::RegionType Distance2RegionType;

  typedef typename OutputImageType::RegionType OutputImageRegionType;


/** Set the input files */
  void SetInput1(const TDistance1 * distance1);
  void SetInput2(const TDistance2 * distance2);
  
  const Distance1Type * GetInput1(void);
  const Distance2Type * GetInput2(void);

 

protected:
  LocalDistanceMapImageFilter();
  virtual ~LocalDistanceMapImageFilter() {}
  void PrintSelf(std::ostream& os, Indent indent) const;

  /** LocalDistanceMapImageFilter can be implemented as a multithreaded filter.
   * Therefore, this implementation provides a ThreadedGenerateData()
   * routine which is called for each processing thread. The output
   * image data is allocated automatically by the superclass prior to
   * calling ThreadedGenerateData().  ThreadedGenerateData can only
   * write to the portion of the output image specified by the
   * parameter "outputRegionForThread"
   *
   */
  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
                            int threadId );

private:
  LocalDistanceMapImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

};
  
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLocalDistanceMapImageFilter.txx"
#endif

#endif